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Effects of Scale Composition on Oxidation Kinetics of Fe-based Superalloy
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作者 王海涛 于化顺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第1期99-103,共5页
By oxidation weight gain method, four groups of Fe-based superalloys with different content of chromium, aluminium and silicon were tested at 1 200 ℃ for 500 hours. According to the oxidation weight gains, the oxidat... By oxidation weight gain method, four groups of Fe-based superalloys with different content of chromium, aluminium and silicon were tested at 1 200 ℃ for 500 hours. According to the oxidation weight gains, the oxidation kinetic curves were plotted, and the equations were regressed by least square method and non-linear curve fitting. The effects of different scale compositions on the morphology and oxidation kinetic law were studied further by analysis of X-ray diffraction (XRD) and scanning electron microscope (SEM). It is found that the compounded scale is composed of Cr2O3, Al2O3, SiO2 and FeCr2O4, with compact structure and fine grains, possessing complete oxidation resistance at 1 200 ℃, and the oxidation kinetic curve follows the power function of y=axb (a0, 0b1). When the compounded scale lacks Al2O3 or SiO2, it becomes weak in oxidation resistance, but the oxidation kinetic curve still follows the power function with bigger parameter b. When Cr2O3 is absent, the kinetic curve shows two parts: the slow adding of oxidation weight gains at the beginning and the ascending line in the end. Such scale loses oxidation resistance completely. 展开更多
关键词 superalloy iron alloy oxide scale oxidation resistance property
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Activity coefficients of NiO and CoO in CaO–Al_2O_3–SiO_2 slag and their application to the recycling of Ni–Co–Fe-based end-of-life superalloys via remelting 被引量:2
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作者 Xin Lu Takahiro Miki Tetsuya Nagasaka 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第1期25-36,共12页
To design optimal pyrometallurgical processes for nickel and cobalt recycling, and more particularly for the end-of-life process of Ni-Co-Fe-based end-of-life(EoL) superalloys, knowledge of their activity coefficien... To design optimal pyrometallurgical processes for nickel and cobalt recycling, and more particularly for the end-of-life process of Ni-Co-Fe-based end-of-life(EoL) superalloys, knowledge of their activity coefficients in slags is essential. In this study, the activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag, a candidate slag used for the EoL superalloy remelting process, were measured using gas/slag/metal equilibrium experiments. These activity coefficients were then used to consider the recycling efficiency of nickel and cobalt by remelting EoL superalloys using CaO-Al_2O_3-SiO_2 slag. The activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag both show a positive deviation from Raoult's law, with values that vary from 1 to 5 depending on the change in basicity. The activity coefficients of NiO and CoO peak in the slag with a composition near B =(%CaO)/(%SiO_2) = 1, where B is the basicity. We observed that controlling the slag composition at approximately B = 1 effectively reduces the cobalt and nickel oxidation losses and promotes the oxidation removal of iron during the remelting process of EoL superalloys. 展开更多
关键词 RECYCLING nickel cobalt END-OF-LIFE superalloyS activity coefficients REMELTING SLAG
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Achieving a superior Na storage performance of Fe-based Prussian blue cathode by coating perylene tetracarboxylic dianhydride amine
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作者 Xin-Yuan Fu Lu-Lu Zhang +6 位作者 Zhao-Yao Chen Yunkai Xu Junxiu Wu Cheng-Cheng Wang Xiao-Kai Ding Xue-Lin Yang Jun Lu 《Carbon Energy》 SCIE EI CAS CSCD 2024年第5期53-64,共12页
Fe-based Prussian blue(Fe-PB)cathode material shows great application potential in sodium(Na)-ion batteries due to its high theoretical capacity,long cycle life,low cost,and simple preparation process.However,the crys... Fe-based Prussian blue(Fe-PB)cathode material shows great application potential in sodium(Na)-ion batteries due to its high theoretical capacity,long cycle life,low cost,and simple preparation process.However,the crystalline water and vacancies of Fe-PB lattice,the low electrical conductivity,and the dissolution of metal ions lead to limited capacity and poor cycling stability.In this work,a perylene tetracarboxylic dianhydride amine(PTCDA)coating layer is successfully fabricated on the surface of Fe-PB by a liquid-phase method.The aminated PTCDA(PTCA)coating not only increases the specific surface area and electronic conductivity but also effectively reduces the crystalline water and vacancies,which avoids the erosion of Fe-PB by electrolyte.Consequently,the PTCA layer reduces the charge transfer resistance,enhances the Na-ion diffusion coefficient,and improves the structure stability.The PTCA-coated Fe-PB exhibits superior Na storage performance with a first discharge capacity of 145.2 mAh g^(−1) at 100 mA g^(−1).Long cycling tests exhibit minimal capacity decay of 0.027%per cycle over 1000 cycles at 1 A g^(−1).Therefore,this PTCA coating strategy has shown promising competence in enhancing the electrochemical performance of Fe-PB,which can potentially serve as a universal electrode coating strategy for Na-ion batteries. 展开更多
关键词 cathode material COATING fe-based Prussian blue Na-ion batteries perylene tetracarboxylic dianhydride amine
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Effect of Rotation Rate on Microstructure and Mechanical Properties of Friction Stir Processed Ni–Fe-Based Superalloy 被引量:1
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作者 Miao Wang Xing-Wei Huang +2 位作者 Peng Xue Chuan-Yong Cui Qing-Chuan Zhang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2021年第10期1407-1420,共14页
In this work, friction stir processing(FSP) was applied to the high-strength and high-melting-point Ni–Fe-based superalloy(HT700) for the first time with negligible wear of the stir tool. Different rotation rates wer... In this work, friction stir processing(FSP) was applied to the high-strength and high-melting-point Ni–Fe-based superalloy(HT700) for the first time with negligible wear of the stir tool. Different rotation rates were chosen to investigate the effect of heat input on microstructure and tensile properties at different temperatures of friction stir processed Ni–Fe-based superalloy. The results showed that with increasing rotation rate, the percentage of high-angle grain boundaries and twin boundaries gradually decreased whereas the grain size initially increased and then remained almost constant;the difference in tensile properties of FSP samples with rotation rates of 500–700 rpm was small attributing to their similar grain size, but the maximum strength was achieved in the FSP sample with a rotation rate of 400 rpm and traverse speed of 50 mm/min due to its finest grain size. More importantly, we found that the yield strength of all FSP samples tensioned at 700 ℃ was enhanced clearly resulting from the reprecipitation of γ′ phase. In addition, the grain refinement mechanism of HT700 alloy during FSP was proved to be continuous dynamic recrystallization and the specific refinement process was given. 展开更多
关键词 superalloy Friction stir processing Grain refinement Processing parameter
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Microstructure and tribological properties of laser cladding Fe-based coating on pure Ti substrate 被引量:19
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作者 陈建敏 郭纯 周健松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第9期2171-2178,共8页
Fe-based coating was produced on pure Ti substrate by the laser cladding technology. The composition and microstructure of the fabricated coating were analyzed by scanning electron microscopy (SEM), X-ray diffracti... Fe-based coating was produced on pure Ti substrate by the laser cladding technology. The composition and microstructure of the fabricated coating were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) technique. The tribological properties were tested through sliding against AISI52100 steel ball at different normal loads and sliding speeds. Besides, the morphologies of the worn surfaces and wear debris were analyzed by scanning electron microscopy (SEM) and three dimensional (3D) non-contact surface mapping. The results show that the prepared Fe-based coating has a high hardness of about 860 HV0.2 and exhibits an average wear rate of (0.70-2.32)×10-6 mm3/(N-m), showing that the Fe-based coating can greatly improve the wear resistance of pure Ti substrate. The wear mechanism of the coating involves moderate adhesive and abrasive wear. 展开更多
关键词 TITANIUM fe-based coating laser cladding WEAR
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Effects of zinc on Fe-based catalysts during the synthesis of light olefins from the Fischer-Tropsch process 被引量:10
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作者 高新华 张建利 +4 位作者 陈宁 马清祥 范素兵 赵天生 椿范立 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第4期510-516,共7页
Fe‐based catalysts for the production of light olefins via the Fischer‐Tropsch synthesis were modi‐fied by adding a Zn promoter using both microwave‐hydrothermal and impregnation methods. The physicochemical prope... Fe‐based catalysts for the production of light olefins via the Fischer‐Tropsch synthesis were modi‐fied by adding a Zn promoter using both microwave‐hydrothermal and impregnation methods. The physicochemical properties of the resulting catalysts were determined by scanning electron mi‐croscopy, the Brunauer‐Emmett‐Teller method, X‐ray diffraction, H2 temperature‐programed re‐duction and X‐ray photoelectron spectroscopy. The results demonstrate that the addition of a Zn promoter improves both the light olefin selectivity over the catalyst and the catalyst stability. The catalysts prepared via the impregnation method, which contain greater quantities of surface ZnO, exhibit severe carbon deposition following activity trials. In contrast, those materials synthesized using the microwave‐hydrothermal approach show improved dispersion of Zn and Fe phases and decreased carbon deposition, and so exhibit better CO conversion and stability. 展开更多
关键词 Zn promoter fe-based catalyst Light olefin Fischer-Tropsch synthesis Microwave-hydrothermal method
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Fabrication, tribological and corrosion behaviors of detonation gun sprayed Fe-based metallic glass coating 被引量:7
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作者 吴宏 兰小东 +5 位作者 刘咏 李飞 张卫东 陈紫瑾 宰雄飞 曾晗 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第6期1629-1637,共9页
A metallic glass coating with the composition of Fe51.33Cr14.9Mo25.67Y3.4C3.44B1.26 (mole fraction, %) on the Q235 stainless steel was developed by the detonation gun (D-gun) spraying process. The microstructure a... A metallic glass coating with the composition of Fe51.33Cr14.9Mo25.67Y3.4C3.44B1.26 (mole fraction, %) on the Q235 stainless steel was developed by the detonation gun (D-gun) spraying process. The microstructure and the phase aggregate were analyzed by scanning electron microscopy and X-ray diffractometry, respectively. Microhardness, wear resistance and corrosion behavior were assessed using a Vickers microhardness tester, a ball-on-disk wear testing machine and the electrochemical measurement method, respectively. Microstructural studies show that the coatings possess a densely layered structure with the porosity less than 2.1%. The tribological behavior of the coatings examined under dry conditions shows that their relative wear resistance is five times higher than that of the substrate material. Both adhesive wear and abrasive wear contribute to the friction, but the former is the dominant wear mechanism of the metallic glass coatings. The coatings exhibit low passive current density and extremely wide passive region in 3.5% NaCl solution, thus indicating excellent corrosion resistance. 展开更多
关键词 fe-based metallic glass coating detonation gun spraying microstructure tribological behavior corrosion behavior
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Corrosion resistance of Fe-based amorphous metallic matrix coating fabricated by HVOF thermal spraying 被引量:19
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作者 王善林 成京昌 +1 位作者 李承勋 柯黎明 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第1期146-151,共6页
The Fe-based amorphous metallic matrix coating (Fe-AMMC) was fabricated with the powder mixtures of Fe-based metallic glass synthesized with industrial raw materials, NiCr alloy and WC particle by high velocity oxy-... The Fe-based amorphous metallic matrix coating (Fe-AMMC) was fabricated with the powder mixtures of Fe-based metallic glass synthesized with industrial raw materials, NiCr alloy and WC particle by high velocity oxy-fuel (HVOF) spraying. The corrosion resistance of Fe-AMMC was investigated by potentiodynamic polarization tests in 1 mol/L HCl, NaCl, H2SO4 and NaOH solutions, respectively. The surface morphologies corroded were observed by SEM. The results indicate that Fe-AMMC exhibits excellent corrosion resistance, higher corrosion resistance than 304L stainless steel in the chloride solutions. The low corrosion current density and passive current density of Fe-AMMC with a wide spontaneous passivation region are about 132.0μA/cm2 and 9.0 mA/cm2 in HCl solution, and about 2.5 μA/cm2 and 2.3 mA/cm2 in NaCl solution. The excellent corrosion resistance demonstrates that Fe-based amorphous metallic matrix powder is a viable engineering material in practical anti-corrosion and anti-wear coating applications. 展开更多
关键词 fe-based metallic glass COATING corrosion resistance HVOF spraying
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Effect of casting vacuum on thermodynamic and corrosion properties of Fe-based glassy alloy 被引量:2
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作者 孙益民 王永刚 +4 位作者 张集滕 李瑞 郭玲玉 徐慧 王伟民 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第3期844-849,共6页
The effect of casting vacuum on thermodynamic and corrosion properties of Fe61Co7Zr8Mo5W2B17 in shape of cylinder of 3 mm in diameter and ribbon of 20?40μm in thickness and 2?3 mm in width were investigated with X-ra... The effect of casting vacuum on thermodynamic and corrosion properties of Fe61Co7Zr8Mo5W2B17 in shape of cylinder of 3 mm in diameter and ribbon of 20?40μm in thickness and 2?3 mm in width were investigated with X-ray diffraction (XRD), differential scanning calorimetry (DSC), dilatometer (DIL), scanning electron microscopy (SEM) and electrochemical station. It is found that high casting vacuum can improve the glass forming ability (GFA), the contraction degree during heating, and the pitting resistance of the glassy alloy, which can be ascribed to the fact that the dissolution of tungsten in the melt is improved under the high casting vacuum. 展开更多
关键词 fe-based alloys casting vacuum DILATION corrosion resistance
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EFFECT OF Nb ON STRENGTHENING OF Fe-BASE SUPERALLOY AT INTERMEDIATE HIGH TEMPERATURES 被引量:1
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作者 CHEN Guosheng WU Bohua ZHOU Lecheng LI Yuqing Research Institute of Daye Steel Works,Huangshi,China Engineer,Research Institute of Daye Steel Works,Huangshi 435001,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1993年第2期81-85,共5页
Because Nb accelerates the uniform distribution of MC phase and the grain refinement,as well as,increases the amount and stability of γ-phase,the tensile strength,ductility,stress rupture life and fatigue limit of Fe... Because Nb accelerates the uniform distribution of MC phase and the grain refinement,as well as,increases the amount and stability of γ-phase,the tensile strength,ductility,stress rupture life and fatigue limit of Fe-30Ni-13Cr-1.2W-1.5Mo-2.5Ti-0.4AI superalloy at 650℃ can be improved with increase of Nb content up to 1.22 wt-%.The precipitation of small Laves phase particles dispersed along grain boundaries may be favourable to combined properties of the superalloy containing 1.22 wt-% Nb.It will be worsened only that the pre- cipitation of Laves phase particles'dispersed along grain boundaries may be favourable for combined properties of the superalloy containing 1.22 wt-% Nb.It will be worsened only that the precipitation of Laves phase is too more because of too high Nb content existhing. 展开更多
关键词 NB fe-base superalloy strengthening
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Surface hardening of Fe-based alloy powders by Nd:YAG laser cladding followed by electrospark deposition with WC-Co cemented carbide 被引量:22
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作者 WANG Jiansheng,MENG Huimin,YU Hongying,FAN Zishuan,and SUN Dongbai School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 《Rare Metals》 SCIE EI CAS CSCD 2010年第4期380-384,共5页
This paper presents the results of a study concerned with the surface hardening of Fe-based alloys and WC-8Co cemented carbide by inte- grating laser cladding and the electrospark deposition processes. Specimens of lo... This paper presents the results of a study concerned with the surface hardening of Fe-based alloys and WC-8Co cemented carbide by inte- grating laser cladding and the electrospark deposition processes. Specimens of low carbon steel were processed firstly by laser cladding with Fe-based alloy powders and then by electrospark deposition with WC-SCo cemented carbide. It is shown that, for these two treatments, the electrospark coating possesses finer microstructure than the laser coating, and the thickness and surface hardness of the electrospark coating can be substantially increased. 展开更多
关键词 laser cladding electrospark deposition surface hardening fe-based alloy cemented carbide
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Formation and corrosion behavior of Fe-based amorphous metallic coatings prepared by detonation gun spraying 被引量:10
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作者 周正 王鲁 +1 位作者 王富耻 柳彦博 《中国有色金属学会会刊:英文版》 CSCD 2009年第S3期634-638,共5页
Amorphous metallic coatings with a composition of Fe48Cr15Mo14C15B6Y2 were prepared by detonation gun spraying process. Microstructural studies show that the coatings present a densely layered structure typical of the... Amorphous metallic coatings with a composition of Fe48Cr15Mo14C15B6Y2 were prepared by detonation gun spraying process. Microstructural studies show that the coatings present a densely layered structure typical of thermally sprayed deposits with the porosity below 2%. Both crystallization and oxidation occurred obviously during spraying process, so that the amorphous fraction of the coatings decreased to 54% compared with fully amorphous alloy ribbons of the same component. Corrosion behavior of the amorphous coatings was investigated by electrochemical measurement. The results show that the coatings exhibit extremely wide passive region and low passive current density in 3.5% NaCl (mass fraction) and 1 mol/L HCl solutions, which illustrates excellent ability to resist localized corrosion. 展开更多
关键词 fe-based AMORPHOUS coating DETONATION GUN microstructure corrosion behavior
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Microstructure of Fe-Based Alloy Hardfacing Coating Reinforced by TiC-VC Particles 被引量:7
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作者 WANG Xin-hong ZOU Zeng-da QU Shi-yao 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第4期51-55,共5页
Mierostrueture of the Fe-based alloy hardfaeing coating reinforced by TiC-VC particles was investigated by means of SEM, TEM, XRD and EPMA. The thermodynamics and effect of elements on the carbides were discussed. The... Mierostrueture of the Fe-based alloy hardfaeing coating reinforced by TiC-VC particles was investigated by means of SEM, TEM, XRD and EPMA. The thermodynamics and effect of elements on the carbides were discussed. The result shows that TiC-VC carbides can be formed during arc welding. Carbides with particle size of 2 ~4μm are uniformly dispersed in the matrix. Evidently the covering components and their amount affect the microstrueture and hardness of the coatings. An excellent microstructure and hardness of hardfacing coating were obtained, while the amount of graphite, FeTi and FeV was controlled within the range of 8%- 10%, 15%- 18% and 8%- 12%, respectively. 展开更多
关键词 TiC-VC particle arc welding fe-based hardfacing coating MICROSTRUCTURE
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Wear and corrosion resistance of laser-cladded Fe-based composite coatings on AISI 4130 steel 被引量:9
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作者 Li Fan Hai-yan Chen +2 位作者 Yao-hua Dong Li-hua Dong Yan-sheng Yin 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第6期716-728,共13页
The wear and corrosion resistance of Fe_(72.2)Cr_(16.8)Ni_(7.3)Mo_(1.6)Mn_(0.7)C_(0.2)Si_(1.2) and Fe_(77.3)Cr_(15.8)Ni_(3.9)Mo_(1.1)Mn_(0.5)C_(0.2)Si_(1.2) coatings laser-cladded on AISI 4... The wear and corrosion resistance of Fe_(72.2)Cr_(16.8)Ni_(7.3)Mo_(1.6)Mn_(0.7)C_(0.2)Si_(1.2) and Fe_(77.3)Cr_(15.8)Ni_(3.9)Mo_(1.1)Mn_(0.5)C_(0.2)Si_(1.2) coatings laser-cladded on AISI 4130 steel were studied.The coatings possess excellent wear and corrosion resistance despite the absence of expensive yttrium,tungsten,and cobalt and very little molybdenum.The microstructure mainly consists of dendrites and eutectic phases,such as duplex(γ+α)-Fe and the Fe–Cr(Ni)solid solution,confirmed via energy dispersive spectrometry and X-ray diffraction.The cladded Fe-based coatings have lower coefficients of friction,and narrower and shallower wear tracks than the substrate without the cladding,and the main wear mechanism is mild abrasive wear.Electrochemical test results suggest that the soft Fe_(72.2)Cr_(16.8)Ni_(7.3)Mo_(1.6)Mn_(0.7)C_(0.2)Si_(1.2) coating with high Cr and Ni concentrations has high passivation resistance,low corrosion current,and positive corrosion potential,providing a better protective barrier layer to the AISI 4130 steel against corrosion. 展开更多
关键词 fe-based coating laser cladding AISI 4130 steel wear resistance corrosion resistance
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Effect of heat treatment on the microstructure and hardness of C-Cr-W-Mo-V-RE Fe-based hardfacing layer 被引量:7
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作者 常立民 刘建华 缑慧阳 《China Welding》 EI CAS 2006年第1期43-48,共6页
After different heat treatment processes, the metal compound, the microstructure and the hardness of the C-Cr-W- Mo-V-RE Fe-based hardfacing layers are investigated by means of metallographic microscope, X-ray diffrac... After different heat treatment processes, the metal compound, the microstructure and the hardness of the C-Cr-W- Mo-V-RE Fe-based hardfacing layers are investigated by means of metallographic microscope, X-ray diffraction ( XRD ), energy dispersive spectrum( EDS ), transmission electron microscope(TEM) and hardness tester. The results show that the hardfacing layers have higher tempering stability and secondary hardening property. After quenching at 820 ℃ ,the hardness value( HRC37 ) and the microstructure of the layers are similar to that normalized at 820 - 1 000 ℃. The tempering stability and the hardness increases with increasing quench temperature, which is attributed to the amount of the alloy element in the matrix. These results are very helpful for improving the mechanical properties of the hardfacing layers. 展开更多
关键词 C-Cr-W-Mo-V-RE fe-based hardfacing layer heat treatment MICROSTRUCTURE HARDNESS
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EFFECTS OF AGING TEMPERATURE AND TIME ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AN Fe-BASE SUPERALLOY 被引量:1
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作者 GUO Shouren LU Dezhong GUO Jianting Institute of Metal Research,Academia,Shenyang,ChinaWU Xi Fushun Steel Works,Fushun,China Associate Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1991年第1期25-32,共8页
The mechanical properties and microstructure of an Fe-base superalloy GH35A have been examined after aging at 650—750℃ for 100—10000 h.The tensile strength of the alloy changes no more with aging temperature and th... The mechanical properties and microstructure of an Fe-base superalloy GH35A have been examined after aging at 650—750℃ for 100—10000 h.The tensile strength of the alloy changes no more with aging temperature and the time at room temperature,but the ductility and impact toughness at room temperature,as well as the stress-rupture life up to 700℃ de- crease slowly during aging up to 10000 h The initiation time to worsen its properties becomes shorter as the aging temperature rises.The variation of the mechanical properties of the alloy was found mainly depending on the formation,morphology,distribution and characteristic of the σ-phase precipitation. 展开更多
关键词 superalloy AGING mechanical property σ-phase γ-phase
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Ternary System of Fe-based Ionic Liquid,Ethanol and Water for Wet Flue Gas Desulfurization 被引量:5
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作者 解美莹 李沛沛 +2 位作者 郭惠锋 高丽霞 余江 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第1期140-145,共6页
Fe-based ionic liquid (Fe-IL) was synthesized by mixing FeCl3·6H2O and 1-butyl-3-methylimidazolium chloride [Bmim]C1 in this paper. The phase diagram of a ternary Fe-IL, ethanol and water system was investigate... Fe-based ionic liquid (Fe-IL) was synthesized by mixing FeCl3·6H2O and 1-butyl-3-methylimidazolium chloride [Bmim]C1 in this paper. The phase diagram of a ternary Fe-IL, ethanol and water system was investigated to construct a ternary desulfurization solution for wet flue gas desulfurization. The effects of flow rate and concentration of SO2, reaction temperature, pH and Fe-IL fraction in aqueous desulfurization solution on the desulfiariza- tion efficiency were investigated. The results shows that the best composition of ternary desulfurization solution of Fe-IL, ethanol and water is 1 : 1.5 : 3 by volume ratio, and pH should be controlled at 2.0. Under such conditions, a desulfurization rate greater than 90% could be obtained. The product of sulfuric acid had inhibition effect on the wet desulfurization process. With applying this new ternary desulfurization solution, not only the catalyst Fe-IL can be recycled and reused, but also the product sulfuric acid can be separated directly from the ternary desulfurization system. 展开更多
关键词 fe-based ionic liquid ternary phase diagram sulfide dioxide wet flue gas desulfurization
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FACILE HYDROTHERMAL SYNTHESIS AND GROWTH KINETICS OF Fe-BASED MAGNETIC NANOPARTICLES 被引量:2
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作者 C.X. You J.C. Zhang Y. Shen Z.W. Song 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2007年第6期434-440,共7页
The facile hydrothennal method was used to synthesize Fe3O4 nanoparticles with an average diameter of 1 1nm. The pure body-centered cubic (bcc)-Fe nanoparticles were prepared by reduction of Fe3O4 nanoparticles powd... The facile hydrothennal method was used to synthesize Fe3O4 nanoparticles with an average diameter of 1 1nm. The pure body-centered cubic (bcc)-Fe nanoparticles were prepared by reduction of Fe3O4 nanoparticles powder in H2 atmosphere. The structure, morphology and magnetic'properties of the products were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis-differential scanning calorimetry (TGA-DSC) and vibrating sample magnetometer (VSM). The results showed that the as-prepared Fe3O4 nanoparticles had a relatively homogeneous size. The particle diameters became bigger with the increase of reaction time. The growth kinetics of the Fe3O4 nanoparticles was also briefly discussed. The products exhibited superparamagnetic properties at room temperature and the specific saturation magnetization was dependent on the particle sizes. 展开更多
关键词 fe-based nanoparticle hvdrothermal specific saturation magnetization KINETICS
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Glass formation and magnetic properties of Fe-based metallic glasses fabricated by low-purity industrial materials 被引量:2
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作者 Man ZHU Yang FA +5 位作者 Zeng-yun JIAN Li-juan YAO Chang-qing JIN Jun-feng XU Rui-hua NAN Fang-e CHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第4期857-862,共6页
Fe-based metallic glasses of(Fe74Nb6B20)100?xCrx(x=1,3,5)with high glass forming ability(GFA)and good magneticproperties were prepared using low-purity raw materials.Increasing Cr content does not significantly change... Fe-based metallic glasses of(Fe74Nb6B20)100?xCrx(x=1,3,5)with high glass forming ability(GFA)and good magneticproperties were prepared using low-purity raw materials.Increasing Cr content does not significantly change glass transitiontemperature and onset crystallization temperature,while it enhances liquidus temperature.The addition of Cr improves the GFA ofthe(Fe74Nb6B20)100?xCrx glassy alloys compared to that in Cr-free Fe?Nb?B alloys,in which the supercooled liquid region(ΔTx),Trgandγare found to be50?54K,0.526?0.538,and0.367?0.371,respectively.The(Fe74Nb6B20)100?xCrx glassy alloys exhibit excellentsoft magnetic properties with high saturation magnetization of139?161A·m2/kg and low coercivity of30.24?58.9A/m.PresentFe?Nb?B?Cr glassy alloys exhibiting high GFA as well as excellent magnetic properties and low manufacturing cost make themsuitable for magnetic components for engineering application. 展开更多
关键词 fe-based metallic glasses CR glass forming ability magnetic property
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Microstructure and Properties of Fe-Based Coating on Column Surface Formed by High Frequency Induction Cladding 被引量:4
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作者 Huilong Yang Yufu Sun +4 位作者 Jingjie Shen Sumeng Hu Qing Zhao Xiangcai Jia Jingchao Zhang 《Journal of Surface Engineered Materials and Advanced Technology》 2012年第1期40-43,共4页
The Fe-based coating was produced on the surface of the column substrate with a Al2O3 cylindrical sleeve by high frequency induction cladding, microstructure of the coating was investigated with scanning electron micr... The Fe-based coating was produced on the surface of the column substrate with a Al2O3 cylindrical sleeve by high frequency induction cladding, microstructure of the coating was investigated with scanning electron microscope (SEM), the crystal structure was characterized by X-ray diffractometer (XRD), the microhardness and wear resisitance of the coating were evaluated. The results show that a metallurgical bond between coating and substrate was obtained during the rapid solidification, the phases of the coating were composed of austenite and the eutectic of γ-Fe + (Cr, Fe)7(C, B)3. Compared with the substrate, the microhardness and wear resistance of the coating improved apparently, solid-solution strengthening and second-phase particle hardening led to these results. 展开更多
关键词 High Frequency INDUCTION CLADDING fe-based Coating Microstructure Wear Resisitance
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