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Microanalysis on the Hydrogen Ion Irradiated 50 wt pct TiC-C Films 被引量:1
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作者 Hui JIANG Yaoguang LIU Ningkang HUANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2007年第1期127-130,共4页
The 50 wt pct TiC-C films were prepared on stainless steel substrates by using a technique of ion beam mixing. These films were irradiated by hydrogen ion beam with a dose of 1×10^18 ions/cm^2 and an energy of 5 ... The 50 wt pct TiC-C films were prepared on stainless steel substrates by using a technique of ion beam mixing. These films were irradiated by hydrogen ion beam with a dose of 1×10^18 ions/cm^2 and an energy of 5 keV. Microanalysis of X-ray photoelectron spectroscopy (XPS) and secondary ion mass spectroscopy (SIMS) were used to analyze the films before and after hydrogen ion irradiation and to study the mechanism of hydrogen resistance. 展开更多
关键词 Titanium carbide hydrogen ion irradiation MICROANALYSIS
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Influence of magnetic filter field on the radio-frequency negative hydrogen ion source of neutral beam injector for China Fusion Engineering Test Reactor 被引量:1
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作者 Yingjie WANG Jiawei HUANG +2 位作者 Yuru ZHANG Fei GAO Younian WANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2021年第11期185-192,共8页
In the design of negative hydrogen ion sources,a magnetic filter field of tens of Gauss at the expansion region is essential to reduce the electron temperature,which usually results in a magnetic field of around 10 Ga... In the design of negative hydrogen ion sources,a magnetic filter field of tens of Gauss at the expansion region is essential to reduce the electron temperature,which usually results in a magnetic field of around 10 Gauss in the driver region,destabilizing the discharge.The magnetic shield technique is proposed in this work to reduce the magnetic field in the driver region and improve the discharge characteristics.In this paper,a three-dimensional fluid model is developed within COMSOL to study the influence of the magnetic shield on the generation and transport of plasmas in the negative hydrogen ion source.It is found that when the magnetic shield material is applied at the interface of the expansion region and the driver region,the electron density can be effectively increased.For instance,the maximum of the electron density is 6.7×10^(17)m^(-3)in the case without the magnetic shield,and the value increases to 9.4×10^(17)m^(-3)when the magnetic shield is introduced. 展开更多
关键词 radio-frequency negative hydrogen ion sources three-dimensional fluid model neutral beam injection
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Transient Behavior of Negative Hydrogen Ion Extraction from Plasma
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作者 蓝朝晖Institute of Fluid Physics China Academy of Engineering Physics +2 位作者 彭宇飞 杨振 龙继东 《Plasma Science and Technology》 SCIE EI CAS CSCD 2013年第9期945-949,共5页
For plasma source, the extraction of negative ions is quite different from that of positive ions. To understand the effect of extraction field on plasma, the time-dependent behavior of negative hydrogen ion extraction... For plasma source, the extraction of negative ions is quite different from that of positive ions. To understand the effect of extraction field on plasma, the time-dependent behavior of negative hydrogen ion extraction from a negative ion source has been studied by particle-in-cell simulation in the collisionless limit. The simulations have shown that, due to the difference in dynamics between electrons and ions, the imbalance of the numbers of charged particles occurs in the source, results in the broadening of plasma sheath and the great increase of plasma potential. The resultant high sheath field and the ambipolar electric field in plasma make the negatively charged particles congregate inside the sheath and move toward the extraction outlet. The emission area of negative ions is much smaller than that of the extraction aperture, which is in sharp contrast to the case of positive ion extraction. 展开更多
关键词 negative hydrogen ion particle-in-cell simulation ion source ion extraction
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Electron Spectroscopy Studies on SiC Films before and after Hydrogen Ion Irradiation
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作者 黄宁康 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第2期1-4,共4页
The ion beam mixing prepared SiC films on stainless steel substrates were irradiated by hydrogen ion beam with an energy of 5 keV to a dose of 1 x 10(18) ions/cm(2). AES and XPS were used for the characterization of c... The ion beam mixing prepared SiC films on stainless steel substrates were irradiated by hydrogen ion beam with an energy of 5 keV to a dose of 1 x 10(18) ions/cm(2). AES and XPS were used for the characterization of chemical bonding states of C and Si elements in SiC films as well as contamination oxygen before and after hydrogen ion irradiation in order to study the effect of hydrogen ion irradiation on SiC films and to understand oxygen behaviors in the SiC films prepared with ion beam mixing. The results shou, that contamination oxygen can react with silicon to form silicon oxides, and more oxygen entered into the films during hydrogen ion irradiation. In addition, oxygen also reacts with carbon related hydrogen to form species including carbon, hydrogen and oxygen. 展开更多
关键词 SiC films hydrogen ion inadiation microanalyses
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Numerical investigation of radio-frequency negative hydrogen ion sources by a three-dimensional fluid model
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作者 Ying-Jie Wang Jia-Wei Huang +3 位作者 Quan-Zhi Zhang Yu-Ru Zhang Fei Gao You-Nian Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第9期335-345,共11页
A three-dimensional fluid model is developed to investigate the radio-frequency inductively coupled H2 plasma in a reactor with a rectangular expansion chamber and a cylindrical driver chamber,for neutral beam injecti... A three-dimensional fluid model is developed to investigate the radio-frequency inductively coupled H2 plasma in a reactor with a rectangular expansion chamber and a cylindrical driver chamber,for neutral beam injection system in CFETR.In this model,the electron effective collision frequency and the ion mobility at high E-fields are employed,for accurate simulation of discharges at low pressures(0.3 Pa-2 Pa)and high powers(40 kW-100 kW).The results indicate that when the high E-field ion mobility is taken into account,the electron density is about four times higher than the value in the low E-field case.In addition,the influences of the magnetic field,pressure and power on the electron density and electron temperature are demonstrated.It is found that the electron density and electron temperature in the xz-plane along permanent magnet side become much more asymmetric when magnetic field enhances.However,the plasma parameters in the yz-plane without permanent magnet side are symmetric no matter the magnetic field is applied or not.Besides,the maximum of the electron density first increases and then decreases with magnetic field,while the electron temperature at the bottom of the expansion region first decreases and then almost keeps constant.As the pressure increases from 0.3 Pa to 2 Pa,the electron density becomes higher,with the maximum moving upwards to the driver region,and the symmetry of the electron temperature in the xz-plane becomes much better.As power increases,the electron density rises,whereas the spatial distribution is similar.It can be summarized that the magnetic field and gas pressure have great influence on the symmetry of the plasma parameters,while the power only has little effect. 展开更多
关键词 negative hydrogen ion source inductively coupled plasma three-dimensional fluid model magnetic field effect
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3D fluid model analysis on the generation of negative hydrogen ions for negative ion source of NBI
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作者 邢思雨 高飞 +3 位作者 张钰如 王英杰 雷光玖 王友年 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第10期105-116,共12页
A radio-frequency(RF) inductively coupled negative hydrogen ion source(NHIS) has been adopted in the China Fusion Engineering Test Reactor(CFETR) to generate negative hydrogen ions.By incorporating the level-lumping m... A radio-frequency(RF) inductively coupled negative hydrogen ion source(NHIS) has been adopted in the China Fusion Engineering Test Reactor(CFETR) to generate negative hydrogen ions.By incorporating the level-lumping method into a three-dimensional fluid model,the volume production and transportation of H^(-) in the NHIS,which consists of a cylindrical driver region and a rectangular expansion chamber,are investigated self-consistently at a large input power(40 k W) and different pressures(0.3–2.0 Pa).The results indicate that with the increase of pressure,the H^(-) density at the bottom of the expansion region first increases and then decreases.In addition,the effect of the magnetic filter is examined.It is noteworthy that a significant increase in the H^(-) density is observed when the magnetic filter is introduced.As the permanent magnets move towards the driver region,the H^(-) density decreases monotonically and the asymmetry is enhanced.This study contributes to the understanding of H-distribution under various conditions and facilitates the optimization of volume production of negative hydrogen ions in the NHIS. 展开更多
关键词 negative hydrogen ion sources China Fusion Engineering Test Reactor three-dimensional fluid model(Some figures may appear in colour only in the online journal)
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Impact of Hydrogen Ion Concentration on Amino Acids Composition of Macadamia Protein: Approached Using Cation-Exchange Chromatography
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作者 Jianzhi Ye Zhiping Han Wei Tan 《Journal of Biosciences and Medicines》 2016年第10期6-14,共9页
In the present context, the objective of this study was to synthesize and analyze the content of AA of macadamia protein and the impact of hydrogen ion concentration (pH) on AA composition. The determination of AA mai... In the present context, the objective of this study was to synthesize and analyze the content of AA of macadamia protein and the impact of hydrogen ion concentration (pH) on AA composition. The determination of AA mainly by cation-exchange chromatography was also investigated. Reproducible and reliable techniques for quantification and identification of AA usually require derivatization. However, techniques such as AA analyzer are composed of cation-exchange chromatography and other components can sideline the derivatization with significant accuracy. The present analysis revealed a higher concentration of essential amino acids especially acidic AA, Glu and Asp and basic AA, Arg than other AA in macadamia protein. The study constitutes first report of use of bubble chart for evaluation of AA and explaination of AAS. The results may elaborate that the degradation of AA of macadamia protein for extraction of pH 11 is caused by the impact of pH. Moreover, the nutritional values of AA present in macadamia protein could change for the better by adjusting pH of extraction. 展开更多
关键词 Amino Acids hydrogen ion Concentration Macadamia Protein Cation-Exchange Chromatography
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The characterization of low energy molecular hydrogen ion-induced defects in synthetic diamond by optical absorption
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作者 MaZhong-Quan AokiY 《Nuclear Science and Techniques》 SCIE CAS CSCD 1998年第2期102-108,共7页
The results of optical absorption analysis of the synthetic diamonds(type Ib) which were implanted with 40 keV molecular hydrogen ions at doses of 10^15-10^17H/cm^2(at 100K),showed that the increase of optical density... The results of optical absorption analysis of the synthetic diamonds(type Ib) which were implanted with 40 keV molecular hydrogen ions at doses of 10^15-10^17H/cm^2(at 100K),showed that the increase of optical density(OD) of modified layer(-140nm) in UV-VIS region was dependent upon the damage level caused by ion implantation process.The range of relative optical band gap(Er.opt) around 2.0eV suggested that an amorphous carbon network structure like a-C film,which probably contains some localized subtetrabedral-coordinated clusters embedded in the fourflod(sp^3) sites.was tentatively found in this layer,basing on the optical gap of carbon materials.The evolution of Er,opt with ion fluence indicated that no more hydrogenated carbon compositions were produced in as -implanted samples,while the increase of Er,opt with annealing temperature was very similar to that of hydrogen content dependence of Eopt in hydrogenately amorphous carbon(a-C:H):In addition the optical inhomogeneity of type Ib diamond has been revealed by a 2-dimension topograph in transmission mode at λ=430nm。 展开更多
关键词 金刚石 光吸收 氢离子移植
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Anomalous Phenomena in E<18 keV Hydrogen Ion Beam Implantation Experiments on Pd and Ti
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作者 Wang Tieshan~(1) Piao Yubo~(2) Hao Jifang~(1) Wang Xuezhi~(2) Jin Genming~(1) Niu Zhanqi~(2) (1)Institute of Modern Physics,the Chinese Academy of Sciences,Lanzhou 730000 (2)Department of Modern Physics of Lanzhou University,Lanzhou 730000 《Chinese journal of nuclear physics》 1997年第4期244-249,共6页
Implantation experiments of low energy(1 keV【E【18 keV)hydrogen ion beamson hydrogen loaded metals are performed with high beam density(J<sub>max</sub>1.2 mA/cm<sup>2</sup>)and lowbeam densi... Implantation experiments of low energy(1 keV【E【18 keV)hydrogen ion beamson hydrogen loaded metals are performed with high beam density(J<sub>max</sub>1.2 mA/cm<sup>2</sup>)and lowbeam density(J<sub>min</sub>0.02 mA/cm<sup>2</sup>).Palladium and titanium foils(plates)are bombarded withproton and deuteron beams in order to compare the atomic and nuclear interactions between dif-ferent ion beams.X-ray and charged particles are measured,and neutron and gamma doses arealso monitored during the implantation experiments.An anomalous peak in X-spectra,whoseenergy is about four times the beam energy,is observed during the high beam density experi-ment.The peak moves from about 40 keV to 62 keV and FWHM reduces rapidly,while thebeam energy and intensity increase.Another wide peak with over twice the beam energy is mea-sured in experiment with low beam density.It is located between 16 keV and 30 keV,and itspeak energy increases with the increase of implantation dose(implantation time).Some anoma-lous intensities of neutrons correlated with a charged particle peak(2.93,3.85 MeV)are alsoobserved in the deuteron-palladium experiment.The highest neutron intensity reaches about8×10<sup>4</sup> n/s,while the beam energy and intensity are about 15 keV and 1.0 mA,respectively. 展开更多
关键词 hydrogen ion beam Low energy IMPLANTATion PALLADIUM and TITANIUM FOILS
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Curative effect of hydrogen peroxide combined with silver ion disinfection on pelvic floor dysfunction
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作者 Wei Zhou Hua Guo 《World Journal of Clinical Cases》 SCIE 2024年第21期4508-4517,共10页
BACKGROUND Pelvic floor dysfunction(PFD)is related to muscle fiber tearing during childbirth,negatively impacting postpartum quality of life of parturient.Appropriate and effective intervention is necessary to promote... BACKGROUND Pelvic floor dysfunction(PFD)is related to muscle fiber tearing during childbirth,negatively impacting postpartum quality of life of parturient.Appropriate and effective intervention is necessary to promote PFD recovery.AIM To analyze the use of hydrogen peroxide and silver ion disinfection for vaginal electrodes in conjunction with comprehensive rehabilitation therapy for postpartum women with PFD.METHODS A total of 59 women with PFD who were admitted to the hospital from May 2019 to July 2022 were divided into two groups:Control group(n=27)received comprehensive rehabilitation therapy and observation group(n=32)received intervention with pelvic floor biostimulation feedback instrument in addition to comprehensive rehabilitation therapy.The vaginal electrodes were disinfected with hydrogen peroxide and silver ion before treatment.Intervention for both groups was started 6 weeks postpartum,and rehabilitation lasted for 3 months.Pelvic floor muscle voltage,pelvic floor muscle strength,vaginal muscle voltage,vaginal muscle tone,pelvic floor function,quality of life,and incidence of postpartum PFD were compared between the two groups.RESULTS Before comprehensive rehabilitation treatment,basic data and pelvic floor function were not significantly different between the two groups.After treatment,the observation group showed significant improvements in the maximum voltage and average voltage of pelvic floor muscles,contraction time of type I and type II fibers,pelvic floor muscle strength,vaginal muscle tone,vaginal muscle voltage,and quality of life(GQOLI-74 reports),compared with the control group.The observation group had lower scores on the pelvic floor distress inventory(PFDI-20)and a lower incidence of postpartum PFD,indicating the effectiveness of the pelvic floor biostimulation feedback instrument in promoting the recovery of maternal pelvic floor function.CONCLUSION The combination of the pelvic floor biostimulation feedback instrument and comprehensive rehabilitation nursing can improve pelvic floor muscle strength,promote the recovery of vaginal muscle tone,and improve pelvic floor function and quality of life.The use of hydrogen peroxide and silver ion disinfectant demonstrated favorable antibacterial efficacy and is worthy of clinical application. 展开更多
关键词 Pelvic floor biostimulation feedback instrument Comprehensive rehabilitation therapy Postpartum pelvic floor dysfunction Vaginal electrode Disinfection with hydrogen peroxide and silver ion Nanocolloidal silver
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The missing hydrogen ion,part-1:Historical precedents vs.fundamental concepts 被引量:2
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作者 Robert Robergs Bridgette O'Malley +1 位作者 Sam Torrens Jason Siegler 《Sports Medicine and Health Science》 2023年第4期336-343,共8页
The purpose of this review and commentary was to provide an historical and evidence-based account of organic acids and the biochemical and organic chemistry evidence for why cells do not produce metabolites that are a... The purpose of this review and commentary was to provide an historical and evidence-based account of organic acids and the biochemical and organic chemistry evidence for why cells do not produce metabolites that are acids.The scientific study of acids has a long history dating to the 16th and 17th centuries,and the definition of an acid was proposed in 1884 as a molecule that when in an aqueous solution releases a hydrogen ion(H^(+)).There are three common ionizable functional groups for molecules classified as acids:1)the carboxyl group,2)the phos-phoryl group and 3)the amine group.The propensity by which a cation will associate or dissociate with a negatively charged atom is quantified by the equilibrium constant(K_(eq))of the dissociation constant(K_(d))of the ionization(K_(eq)=K_(d)),which for lactic acid(HLa)vs.lactate(La^(-))is expressed as:K_(eq)=K_(d)=[H^(+)][La^(-)]/[HLa]=4677.3514(ionic strength=0.01 Mol⋅L^(-1),T=25℃).The negative log10 of the dissociation pKd reveals the pH at which half of the molecules are ionized,which for HLa=3.67.Thus,knowing the pKd and the pH of the solution at question will reveal the extent of the ionization vs.acidification of molecules that are classified as acids. 展开更多
关键词 hydrogen ion Acid ACIDOSIS pH Equilibrium constant(K_(eq)) ionIZATion Dissociation constant(K_(d))
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Hydrogen Ion Implantation Induced Cutting Behavior Variation in Plunge Cutting of the Monocrystalline Silicon 被引量:1
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作者 Zejia Zhao E.V.Jelenkovic +2 位作者 Gaobo Xiao Zhuoxuan Zhuang Suet To 《Nanomanufacturing and Metrology》 2021年第4期209-215,共7页
In this study,surface modification of monocrystalline silicon with two doses of hydrogen ion implantation and the plunge cutting process were conducted to explore the influence of hydrogen ions on the cutting behavior... In this study,surface modification of monocrystalline silicon with two doses of hydrogen ion implantation and the plunge cutting process were conducted to explore the influence of hydrogen ions on the cutting behavior of silicon.The results show that ion implantation is capable of deteriorating or improving the machinability of silicon,depending on the implantation dose.More cleavages and a reduction of critical depth of cut(CDoC)were observed for the silicon with a low implantation dose in the cutting direction of<100>in comparison to bare silicon,while no cleavage and an increase of CDoC were achieved after implantation with a high dose in the same cutting direction.Besides,the ductile cutting and thrust forces of the silicon with the low dose are larger than the bare silicon,but the forces are significantly reduced for the silicon after the high dose of implantation.The variation of the cutting forces is due to the different required stresses to overcome ductile and fracture deformation of silicon. 展开更多
关键词 hydrogen ion implantation Plunge cutting SILICON Critical depth of cut Cutting forces
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HYDROGEN ION CONCENTRATION IN RAIN WATER
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作者 J.Rosinski G.Mancini +1 位作者 C.T.Nagamoto F.Prodi 《Acta meteorologica Sinica》 SCIE 1998年第3期382-384,共3页
Continuous measurements of pH precipitation falling from cumulus clouds in semi-arid region (Colorado,USA),and in wet temperate zone(Bologna,Italy)were made.In Colorado the pH was constant at 7.3 for a period of time,... Continuous measurements of pH precipitation falling from cumulus clouds in semi-arid region (Colorado,USA),and in wet temperate zone(Bologna,Italy)were made.In Colorado the pH was constant at 7.3 for a period of time,and later changed to 7.0 and remained constant at this value during the remainder of the storm.In Italy the pH fluctuated continuously between the approximate values of 5.7 and 6.4 during the storm.The changes in hydrogen ion concentration reflect the chemical composition of cloud condensation nuclei and of scavenged aerosol particles and gases presented in the region. 展开更多
关键词 hydrogen ion concentration pH value PRECIPITATion AEROSOLS
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Using short pulses to enhance the production rate of vibrationally excited hydrogen molecules in hydrogen discharge
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作者 孙继忠 李现涛 +1 位作者 白净 王德真 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第5期405-409,共5页
Hydrogen discharges driven by the combined radio-frequency(rf)/short pulse sources are investigated using the particle-in-cell method.The simulation results show that the discharge driven additionally by the short p... Hydrogen discharges driven by the combined radio-frequency(rf)/short pulse sources are investigated using the particle-in-cell method.The simulation results show that the discharge driven additionally by the short pulse can enhance the electron density and modulate the electron energy to provide a better condition for negative hydrogen ion production than the discharge driven by the rf-only source. 展开更多
关键词 hydrogen discharge particle-in-cell simulation negative hydrogen ion
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Effects of destruxins on free calcium and hydrogen ions in insect hemocytes 被引量:3
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作者 Xiu-Run Chen Qiong-Bo Hu +1 位作者 Xiao-Qiang Yu Shun-Xiang Ren 《Insect Science》 SCIE CAS CSCD 2014年第1期31-38,共8页
Destruxins, cyclohexadepsipeptidic mycotoxins isolated from the ento mopathogenic fungus Metarhizium anisopliae, inhibit innate insect immunity. However, their mechanism of action remains unclear. In this study, the e... Destruxins, cyclohexadepsipeptidic mycotoxins isolated from the ento mopathogenic fungus Metarhizium anisopliae, inhibit innate insect immunity. However, their mechanism of action remains unclear. In this study, the effects ofdestruxins on changes in free calcium and hydrogen ions in the hemocytes ofExolontha serrulata, Bombyx mori and the Spodoptera litura SL1 cell line were detected using laser scanning confocal mi croscopy (LSCM). An instant Ca2+ influx of hemocytes induced by destruxins A and B (DA and DB) was recorded. The DA/DBdependent Ca2+ influx was not influenced by the Ca2+ channel inhibitors 2aminoethoxydiphenyl borane (2APB) and U73122. It also had an apparently different LSCM profile from that of the ionomycindependent Ca2+ influx. However, the instant Ca2+ influx was not seen in the SL1 cells; on the contrary, a slow, moderate enhancement of intracellular Ca2+ was observed. Meanwhile, an instant intracellular free H+ decrease aroused by DA and DB was found. DB at 20/zmol/L and DA at 690/zmol/L significantly reduced intracellular free H+ levels. Furthermore, the vacuolar H+ATPase (VATPase) inhibitor bafilomycin A1 had obvious effects on the decreases ofintracellular free H+ in hemocytes. These results suggest that the mechanism of DA/DBdependent Ca2+ influx is perhaps not related to Ca2+ channels and ionophores; rather, the intracellular free H+ decrease might be due to VATPase inhibition. 展开更多
关键词 CALCIUM destruxin HEMOCYTES hydrogen ionS
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Low-order harmonic generation of hydrogen molecular ion in laser field studied by the two-state model 被引量:1
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作者 Ling-Ling Du Guo-Li Wang +1 位作者 Peng-Cheng Li Xiao-Xin Zhou 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第11期459-465,共7页
The low-order harmonic generation of hydrogen molecular ion interacting with a linearly polarized laser field has been investigated theoretically by using a simple two-state model. The validity of the two-state model ... The low-order harmonic generation of hydrogen molecular ion interacting with a linearly polarized laser field has been investigated theoretically by using a simple two-state model. The validity of the two-state model is carefully examined by comparing the harmonic spectra of hydrogen molecular ion obtained from this model with those from the three-dimensional time-dependent Schr¨odinger equation. When combined with the Morlet transform of quantum time-frequency spectrum,the two-state model can be used to study the dynamical origin of the low-order harmonic generation of hydrogen molecular ion driven by low-frequency pulses. In addition, some interesting structures of the time profiles for low order harmonics are obtained. 展开更多
关键词 low order harmonic generation hydrogen molecule ion two state model
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Effects of Hydrogen Ion Implantation on TiC-C Coating of Stainless Steel 被引量:4
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作者 ZHANG Rui-qian LIU Yao-guang HUANG Ning-kang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2008年第4期77-81,共5页
Titanium carbide coatings are widely used as various wear-resistant material. The hydrogen erosion resistance of TiC-C films and the effect of hydrogen participation on TiC-C films were studied. Seventy-five percent T... Titanium carbide coatings are widely used as various wear-resistant material. The hydrogen erosion resistance of TiC-C films and the effect of hydrogen participation on TiC-C films were studied. Seventy-five percent TiC-C films are prepared on stainless steel surface by using ion mixing, where TiC-C films are deposited by rf magnetron sputtering followed by argon ion bombardment. The samples are then submitted to hydrogen ion implantation at 1.2 × 10^-3 Pa. Characterization for the 75% TiC-C films was done with SIMS, XRD, AES, and XPS. Secondary ion mass spectroscopy (SIMS) was used to analyze hydrogen concentration variation with depth, X-Ray diffraction (XRD) was used to identify the phases, and Auger electron spectra (AES) as well as X-ray photoelectron spectra (XPS) were used to check the effects of hydrogen on shifts of chemical bonding states of C and Ti in the TiC-C films. It is found that TiC-C films on stainless steel surface can prevent hydrogen from entering stainless steel. 展开更多
关键词 hydrogen resistance CARBIDE COATING ion implantation
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Hydrogen Isotopic Compositions of Pyroxenes in Nushan Peridotite Xenoliths,SE China 被引量:5
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作者 YUHuimin XIAQunke +1 位作者 E.DELOULE YANGXiaozhi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2005年第3期336-342,共7页
Hydrogen isotopic compositions of pyroxenes in peridotite xenoliths from the Nushan volcano, Anhui Province, SE China have been obtained using an ion probe (Cameca 1270). D/H ratios are constant within a single grain ... Hydrogen isotopic compositions of pyroxenes in peridotite xenoliths from the Nushan volcano, Anhui Province, SE China have been obtained using an ion probe (Cameca 1270). D/H ratios are constant within a single grain and among the different grains from the same sample. The lack of correlation between the D/H ratios and the hydrogen contents indicates that the hydrogen isotopic compositions are inherited from their mantle source. Combining with the δD values of coexisting amphiboles, it is inferred that the Nushan mantle experienced at least a two-stage metasomatic event. One was responsible for formation of amphiboles with extremely variable δD values, and the other was probably responsible for the high δD values (up to ?20‰) of some clinopyroxenes from peridotites, clinopyroxene and mica megacrysts. High δD values point to a subduction-related fluid being involved in one metasomatic event. The primary δD values (?90‰ to ?140‰) of the Nushan pyroxenes, together with data gleaned from the literature, suggest that the D/H ratios of the nominally anhydrous mineral reservoir might have differed from that of the other mantle hydrogen in being relatively depleted in D. 展开更多
关键词 hydrogen isotope PYROXENE PERIDOTITE ion probe mantle composition Nushan ANHUI
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Effect of Hydrogen Reduction of Silver Ions on the Performance and Structure of New Solid Polymer Electrolyte PEI/Pebax2533/AgBF4 Composite Membranes 被引量:1
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作者 WANG Yanbei RE N Jizhong LI Hui DENG Maicun 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2013年第6期683-690,共8页
In this paper, the effect of hydrogen reduction of silver ions on the performance and structure of new solid polymer electrolyte polyetherimide (PEI)/Pebax2533 (Polynylonl2/tetramethylene oxide block copolymer, PA1... In this paper, the effect of hydrogen reduction of silver ions on the performance and structure of new solid polymer electrolyte polyetherimide (PEI)/Pebax2533 (Polynylonl2/tetramethylene oxide block copolymer, PA12-PTMO)/AgBF4 composite membranes is investigated. For PEI/Pebax2533/AgBF4 composite membranesprepared with dillerent AgBF4 concentration, the permeances of propylene and ethylene increase with the increase of AgBF4 concentration due to the carrier-facilitated transport, resulting in a high selectivity. But for propyl- ene/propane mixture, the mixed-gas selectivity is lower than its ideal selectivity. The hydrogen reduction strongly influences the membrane performance, which causes the decrease of propylene permeance and the increase of pro-pane permeance. With the increase of hydrogen reduction time, the membranes show a clearly color change from white to brown, yielding a great selectivity loss. The data of X-ray diffraction and FT-IR prove that silver ions are reduced to Ago after hydrogen reduction, and aggregated on the surface of PEI/Pebax2533/AgBF4 composite mem- branes. 展开更多
关键词 solid polymer electrolyte membrane hydrogen reduction of silver ions facilitated transport olefin/paraffin separation
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Diagnosis of Hydrogen Plasma in a Miniature Penning Ion Source by Double Probes 被引量:2
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作者 金大志 杨中海 +1 位作者 肖坤祥 戴晶怡 《Plasma Science and Technology》 SCIE EI CAS CSCD 2009年第1期48-51,共4页
Parameters of hydrogen plasma in a miniature Penning discharge ion source, including the electron temperature and the electron density, were measured by using double probes. The results indicate that the electron dens... Parameters of hydrogen plasma in a miniature Penning discharge ion source, including the electron temperature and the electron density, were measured by using double probes. The results indicate that the electron density increases and the electron temperature decreases with the increase in gas pressure and the discharge current. The electron temperature is about 5 - 9 eV and the electron density is 6.0× 10^13 ~ 1.2 × 10^14 m^-3 while the discharge current is in a range of 50 - 120 μA. 展开更多
关键词 Penning discharge ion source hydrogen plasma DIAGNOSIS double probes
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