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38CrMoAlA钢离子氮化层的相关分析
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作者 陈鑫 梁德冬 +1 位作者 曲国君 孙强 《中国科技期刊数据库 工业A》 2017年第4期313-313,共1页
本文在对38CrMoAlA钢离子氮化层相关性分析研究中,采取硝酸酒精实验处理方法,对38CrMoAlA钢进行全面分析理解,希望能够增加对38CrMoAlA钢离子氮化层了解程度。
关键词 38CrMoAlA 钢离子 氮化层
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Mo离子注入钢退火过程中的相变研究 被引量:2
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作者 张通和 吴瑜光 +2 位作者 刘安东 张旭 崔平 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第4期491-495,共5页
着重研究了金属离子注入合成表面优化复合层的机理和纳米相镶嵌结构形成 ,探索了注入和退火过程中纳米结构和相变过程 ,讨论相变机制 .实验中发现用较低束流密度的Mo离子注入钢明显地改变了钢表面的结构 ,可使钢表面晶粒细化 ,使阻止位... 着重研究了金属离子注入合成表面优化复合层的机理和纳米相镶嵌结构形成 ,探索了注入和退火过程中纳米结构和相变过程 ,讨论相变机制 .实验中发现用较低束流密度的Mo离子注入钢明显地改变了钢表面的结构 ,可使钢表面晶粒细化 ,使阻止位错移动的晶界数量增多 ;可在钢表面形成Mo原子超饱和固溶体 ;随所用的束流密度的增加 ,注入时表面温度升高 ,注入的Mo原子将与钢中的铁原子和碳原子化合而形成纳米尺寸的析出相 .这些弥散的析出相在钢表面形成了弥散强化 .用低束流密度注入后经过退火 ,在钢表面也形成了纳米尺寸的析出相 ,从而增加了表面弥散强化的效果 .随退火温度的增高 ,纳米析出相将会聚成大一些的纳米颗粒 ,颗粒之间互相连接而形成网状结构 。 展开更多
关键词 Mo离子注入 退火过程 纳米结构 表面优化层 相变过程 相变机制 材料表面处理
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乳化液膜法分离铜离子的研究
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作者 刘红晶 贺高红 +1 位作者 李祥村 陈国华 《化工进展》 EI CAS CSCD 北大核心 2003年第z1期155-158,共4页
本文利用乳化液膜体系来去除废水中的铜离子,乳液膜体系的表面活性剂为Span-80,载体为Lix-63,油相为煤油,实验研究了影响分离效果的一些因素,如外水相中缓冲溶液的PH值,载体浓度,内水相盐酸浓度,乳水比等.从而得知外水相缓冲溶液的PH值... 本文利用乳化液膜体系来去除废水中的铜离子,乳液膜体系的表面活性剂为Span-80,载体为Lix-63,油相为煤油,实验研究了影响分离效果的一些因素,如外水相中缓冲溶液的PH值,载体浓度,内水相盐酸浓度,乳水比等.从而得知外水相缓冲溶液的PH值选取是否得当,决定着乳液是否能够进行,同时乳液膜对钢离子的富集浓度越大,反渗透作用越明显,会对分离产生不良的影响. 展开更多
关键词 乳化液膜 分离 钢离子
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电解铜离子法防止海水生物附着
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作者 滨田外治 王敏厚 《远洋科技》 1993年第1期77-84,共8页
关键词 电解钢离子 海水生物附着 船舶
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Effect of Strain and Chloride Concentration on Pitting Susceptibility for Type 304 Austenitic Stainless Steel 被引量:11
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作者 吕国诚 程海东 +1 位作者 许淳淳 何宗虎 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第2期314-319,共6页
The effects of strain and chloride concentration on pitting susceptibility for type 304 stainless steel were studied in situ using the electrochemical technology under constant strain. The impact factor fc was brought... The effects of strain and chloride concentration on pitting susceptibility for type 304 stainless steel were studied in situ using the electrochemical technology under constant strain. The impact factor fc was brought forward to value the effect of strain on pitting. The pitting behaviors of type 304 stainless steel in various chloride concentrations under the strain levels 0%, 10%, and 30% were investigated. Potentiostatic polarization technology was used to study how the chloride concentration affected corrosion current density. The results indicated that fc increased substantially and pitting potential varied remarkably when chloride concentration was over 90 mg.L . Under the three levels of strain mentioned above, when chloride concentration was below 463 mg.L^-1,121 mg.L^-1, and 98 mg.L^-1 respectively, the pitting potential shifted towards positivity and, the passive film became more stable. When the strain was below 10%, the pitting susceptibility of type 304 stainless steel varied greatly as strain increased, whereas the susceptibility only changed a little when the strain was over 10%. 展开更多
关键词 304 stainless steel STRAIN pitting corrosion chloride concentration
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Corrosion behavior and electrochemical property of Q235A steel in treated water containing halide ions(F^-, Cl^-) from nonferrous industry 被引量:3
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作者 WANG Yun-yan LUO Yong-jian +1 位作者 XU Hui XIAO Hai-juan 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第4期1224-1234,共11页
The corrosion behaviors and electrochemical properties of Q235 A steel in the treated water containing corrosive halide anions(F-, Cl-) have been investigated with corrosion tests of static coupon and dynamic coupon t... The corrosion behaviors and electrochemical properties of Q235 A steel in the treated water containing corrosive halide anions(F-, Cl-) have been investigated with corrosion tests of static coupon and dynamic coupon testing, electrochemical measurement of open-circuit potential and linear sweep voltammetry. The results reveal that the existence of F-and Cl-ions in the simulated treated water accelerate the corrosion rate of Q235 A steel. The corrosion rate reaches maximum with F-concentration of 50 mg/L, Cl-concentration of 200 mg/L, respectively. However, Q235 A steel would passivate when an applied potential is added to the system. Meanwhile, the initiating passive potential becomes positive with F-, Cl-concentration increasing. There is a little influence of F-, Cl-concentration on the initiating passivation current density. Therefore, it is necessary to control F-, Cl-concentration in the treated water when it is recycled by the pipelines made of Q235 A steel. 展开更多
关键词 simulated water halide anions (F- Cl-) Q235A steel corrosion behavior electrochemical property
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Effect of anions on stress corrosion cracking behaviors of ultra-high strength steel 23Co14Ni12Cr3Mo 被引量:1
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作者 刘建华 文陈 +2 位作者 于美 李松梅 王兵 《Journal of Central South University》 SCIE EI CAS 2014年第6期2117-2124,共8页
The effects of chloride,sulfate and carbonate anions on stress corrosion behaviors of ultra-high strength steel 23Co14Ni12Cr3Mo were studied by stress corrosion cracking(SCC)test method using double cantilever beam(DC... The effects of chloride,sulfate and carbonate anions on stress corrosion behaviors of ultra-high strength steel 23Co14Ni12Cr3Mo were studied by stress corrosion cracking(SCC)test method using double cantilever beam(DCB)specimens.The SCC morphology was observed by using scanning electron microscopy(SEM)and the composition of corrosion products was analyzed by using energy dispersive spectrometer(EDS).The results show that the crack propagates to bifurcation in NaCl and Na2SO4 solution,while the crack in Na2CO3 solution propagates along the load direction.The SCC rate in NaCl solution is the highest,while lower in Na2SO4 solution and little in Na2CO3 solution.From the SEM morphologies,quasi-cleavage fracture was observed in NaCl and Na2SO4 solutions,but intergranular features in Na2CO3 solution.The mechanism of anion effect on SCC of steel 23Co14Ni12Cr3Mo was studied by using full immersion test and electrochemical measurements. 展开更多
关键词 23Co14Ni12Cr3Mo ultra-high strength steel CHLORIDE SULFATE CARBONATE stress corrosion cracking
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Surface wear resistance properties of Ta+N implanted W_(18)Cr_4V high speed steel 被引量:1
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作者 CAO Wei LI Bing-wen +2 位作者 GUO Chu'wen MAO Xin-yuan MA Qin-qin 《Mining Science and Technology》 EI CAS 2009年第1期133-136,共4页
High-speed steel W18Cr4V is commonly used in industries such as blade and mould manufacturers because of its high level of hardness and toughness, M-hardness and resistance, Ion implantation is an effective method to ... High-speed steel W18Cr4V is commonly used in industries such as blade and mould manufacturers because of its high level of hardness and toughness, M-hardness and resistance, Ion implantation is an effective method to improve the wear resistance of W18Cr4V. In our investigation, Ta and Ta+N ion implantation was performed on W18Cr4V high-speed steel. The surface properties after implantation were evaluated by measuring friction coefficients while the cabonyl phase of the surface was analyzed by X-ray diffraction analysis. It was found that the friction coefficients of the treated samples were much lower. Samples implanted with Ta+N had a lower friction coefficients than samples implanted only with Ta. This can be attributed to the formation of a new chemical compound, Fe7Ta3, on both surfaces. An even harder chemical compound, FerN, was formed on both surfaces of Ta+N implanted samples. 展开更多
关键词 ion implantation high speed steel friction coefficient X-ray diffraction
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CO_2 laser-micro plasma arc hybrid welding for galvanized steel sheets 被引量:6
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作者 C.H.KIM Y.N.AHN J.H.KIM 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第A01期47-53,共7页
A laser lap welding process for zinc-coated steel has a well-known unsolved problem-porosity formation. The boiling temperature of coated zinc is lower than the melting temperature of the base metal, which is steel. I... A laser lap welding process for zinc-coated steel has a well-known unsolved problem-porosity formation. The boiling temperature of coated zinc is lower than the melting temperature of the base metal, which is steel. In the autogenous laser welding, the zinc vapor generates from the lapped surfaces expels the molten pool and the expulsion causes numerous weld defects, such as spatters and blow holes on the weld surface and porosity inside the welds. The laser-arc hybrid welding was suggested as an alternative method for the laser lap welding because the arc can preheat or post-beat the weldment according to the arrangement of the laser beam and the arc. CO2 laser-micro plasma hybrid welding was applied to the lap welding of zinc-coated steel with zero-gap. The relationships among the weld quality and process parameters of the laser-arc arrangement, and the laser-arc interspacing distance and arc current were investigated using a full-factorial experimental design. The effect of laser-arc arrangement is dominant because the leading plasma arc partially melts the upper steel sheets and vaporizes or oxidizes the coated zinc on the lapped surfaces. Compared with the result from the laser-TIG hybrid welding, the heat input from arc can be reduced by 40%. 展开更多
关键词 galvanized steel CO2 laser micro plasma hybrid welding
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Durability related environmental zonation and design methodology for marine RC structures 被引量:1
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作者 Wu Hairong Lü Qingfang Jin Weiliang 《Journal of Southeast University(English Edition)》 EI CAS 2018年第1期78-86,共9页
A reliability-based quantitative durability design methodology is presented for reinforced concrete(RC)structures in the marine environment on the basis of natural exposure data derived from four berths(1.5,1.5,4 and ... A reliability-based quantitative durability design methodology is presented for reinforced concrete(RC)structures in the marine environment on the basis of natural exposure data derived from four berths(1.5,1.5,4 and 15 years)of a concrete port.More than 200 chloride profiles are obtained and analyzed.The relationship between nominal surface chloride ion concentration and altitude is discussed.Subsequently,the formula of the apparent chloride diffusion coefficient is proposed with consideration of the surrounding temperature,sodium chloride solution concentration,age factor and altitude.Then,the reliability-based method to predict the durability of RC structures is developed according to Fick s second law.Relationships between the predicted penetration depth of the chloride ion,the ratio of the wetting time per-period and the corresponding altitude are discussed.Subsequently,the environmental zonation methodology is established for concrete structures under a marine chloride environment by considering the ratio of the wetting time per-period of concrete as the zoning index.Finally,the corres-ponding durability design method for each zone level is established,which contains the durability design regulations of the specimen,and correction coefficients for different water/binder ratios,ages,temperatures and chloride ion concentrations. 展开更多
关键词 reinforced concrete structure MARINE chloride ion ENVIRONMENT ZONATION durability design
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Surface treatment of 0Cr19Ni9 stainless steel SMAW joint by plasma melting
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作者 罗伟 栾景飞 严密 《Journal of Zhejiang University Science》 CSCD 2002年第3期272-277,共6页
Micro plasma arc surface melting of 0Cr19Ni9 shielded metal arc welding joint with a micro plasma arc welder produced a thin surface melted layer with a refined microstructure. The surface treatment changed the anod... Micro plasma arc surface melting of 0Cr19Ni9 shielded metal arc welding joint with a micro plasma arc welder produced a thin surface melted layer with a refined microstructure. The surface treatment changed the anodic polarization behavior in 0.5 mol/L H 2SO 4 solution. The polarization tests showed that for the as welded joint both the heat affected zone and the weld metal decreased in resistance to corrosion compared with the as received parent material while for the micro plasma arc surface melted joint the corrosion resistance increased significantly. This increase in corrosion resistance is attributed to the rapid solidification of the melted layer. Rapid solidification of the melted layer refines its microstructure, decreases its microsegregation, and inhibits the precipitation of chromium carbides at the grain boundaries. 展开更多
关键词 Surface melting Stainless steels Plasma arc Welding joint
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Porous ceramic coating formed on 316L by laser cladding combined plasma electrolytic oxidation for biomedical application
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作者 Guo-long WU Shuo ZHANG +4 位作者 Ye WANG Min SUN Qun-li ZHANG Volodymyr KOVALENKO Jian-hua YAO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第9期2993-3004,共12页
In order to improve the bioactivity of 316L stainless steel,a titanium layer was prepared on the surface of 316L by laser cladding(LC),followed by plasma electrolytic oxidation(PEO)to form a porous ceramic coating on ... In order to improve the bioactivity of 316L stainless steel,a titanium layer was prepared on the surface of 316L by laser cladding(LC),followed by plasma electrolytic oxidation(PEO)to form a porous ceramic coating on titanium layer.The morphologies,microstructure and compositions of the coated samples were characterized by 3D surface profiler,SEM,EDS,XRD and XPS.The corrosion resistance and bioactivity of the coatings were evaluated by potentiodynamic polarization and immersion test in simulated body fluid(SBF),respectively.The results showed that the porous ceramic coating mainly consisted of anatase and rutile,and highly crystalline HA was also detected.The main elements of the PEO coating are Ca,P,Ti and O.The LC+PEO composite bio-coating has more excellent corrosion resistance than the 316L substrate in simulated body fluid.Furthermore,the composite coating could effectively improve the bioactivity of 316L stainless steel. 展开更多
关键词 316L stainless steel laser cladding TITANIUM plasma electrolytic oxidation bioactivity
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Study of the Protective Capacity of Cements Regarding Corrosion of Reinforcements under Joint Action of CO2 and Chloride Ions
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作者 Eliana Cristina Barreto Monteiro Victor Correia de Oliveira Pereira 《Journal of Civil Engineering and Architecture》 2015年第9期1017-1024,共8页
To examine the protection against reinforcement corrosion due to the combined action of CO2 and chlorides, experimental results of the evaluation of a study with three types of cement are presented. The study was perf... To examine the protection against reinforcement corrosion due to the combined action of CO2 and chlorides, experimental results of the evaluation of a study with three types of cement are presented. The study was performed observing the behavior of reinforcements which were put in samples submitted to accelerated carbonatation tests and accelerated tests under the effect of chlorides. For the evaluation, intensity corrosion measurements were used using the Pr (polarization resistance) technique, employing these measures as a deterioration indicator. Three types of cement available in the national market were used. The obtained results enabled the classification of the used cements, comparing their profile behaviors in the conditions of the proposed tests. 展开更多
关键词 CARBONATION chlorides CORROSION reinforced concrete polarization resistance.
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Investigation on Relationship between Lubricating Performance and Stability of Emulsion for Cold Strip Rolling 被引量:3
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作者 Sun Jianlin Wang Yizhu +1 位作者 La Rui Wang Bing (School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第3期54-58,共5页
The influence of the ratio and content of emulsifiers on the stability of anion emulsions for cold strip rolling was investigated in this paper. The present study also investigated the effects of HLB (hydrophile-lipo... The influence of the ratio and content of emulsifiers on the stability of anion emulsions for cold strip rolling was investigated in this paper. The present study also investigated the effects of HLB (hydrophile-lipophile balance) value and emulsifier content on the stability of no-ionic emulsions. Based on the effects of different stabilities and different concentrations of emulsions on the adsorptivity and friction coefficients, good lubricating performance was obtained when the amount of the separated oil and soap (SOS) accounted for 2.5%. The wearing scar of the steel balls also indicated the improvements in tribological properties after using the emulsion. Thus, the preparation of emulsion should be regulated according to different rolling conditions. 展开更多
关键词 LUBRICATION oil-water emulsion STABILITY lubricating performance
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Action of Runaway Electron Preionized Diffuse Discharges on Steel: Composition, Structure, and Properties
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作者 Mikhail Shulepov Mikhail Erofeev +2 位作者 Yuri Ivanov Konstantin Oskomov Victor Tarasenko 《Journal of Physical Science and Application》 2015年第1期33-37,共5页
In the work, we studied the effect of the plasma of a runaway electron preionized (REP) diffuse discharge (DD) on the composition, structure, and properties of ST3PS steel surface layers. Voltage pulses with an in... In the work, we studied the effect of the plasma of a runaway electron preionized (REP) diffuse discharge (DD) on the composition, structure, and properties of ST3PS steel surface layers. Voltage pulses with an incident wave amplitude of up to 30 kV, FWHM of around 4 ns, and rise time of around 2.5 ns were applied to the gap in an inhomogeneous electric field. The ST3PS steel specimens exposed to this type of discharge revealed changes in their defect subsystem, suggesting that the runaway electron preionized diffuse discharge provides surface hardening of the steel. 展开更多
关键词 Runway electron preionized diffuse discharge defect substructure hardening of ST3PS steel.
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Tribological Properties of Functionalized Ionic Liquids Containing Ester-group as Lubricants for Steel-Steel System
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作者 Zhu Liye Chen Ligong +2 位作者 Xiang Shuo Chen Guoxu Yang Xin 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2012年第2期60-65,共6页
A series of functionalized ionic liquids (ILs) containing ester-group were synthesized and their tribological prop- erties as lubricants for steel-steel contact were studied and compared with a non-functionalized io... A series of functionalized ionic liquids (ILs) containing ester-group were synthesized and their tribological prop- erties as lubricants for steel-steel contact were studied and compared with a non-functionalized ionic liquid and perfluo- ropolyethers (PFPE). The morphology and chemical composition of the worn scars were analyzed by scanning electron mi- croscopy and X-ray photoelectron spectroscopy, respectively, and the possible lubrication mechanism of ILs was discussed. As a result, all ILs demonstrated a better lubricity and a much higher load-carrying capacity than PFPE used as lubricants for the steel-steel tribomates system. The functionalized ILs with ester-group showed slightly worse friction reducing abil- ity than their nonfunctionalized counterparts at relatively lower loads owing to their higher viscosity, but then exhibited better antiwear ability because the ester group they contained had not only physical but also strong chemical reactions with the freshly exposed steel surface and formed chemical adsorption boundary films on the worn surface during friction pro- cess. Under high loads, some triboehemical reactions took place between the active elements, such as fluorine which were released from the ILs, and fresh metal surfaces of rubbing pairs to form the admixture reaction films, which were mainly composed of ferric fluoride mixed with ferric oxide, leading to lower friction coefficients and good wear resistance. 展开更多
关键词 functionalized ionic liquid 1-ethoxycarbonylmethyl-3-methyl bis(trifluoromethylsulfonyl)imide tribological behavior LUBRICANT
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Netrin-1对肺泡上皮细胞钠离子通道α亚基的调控及其机制
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作者 何婧 王导新 《中国生物制品学杂志》 CAS CSCD 2013年第6期817-821,共5页
目的研究Netrin-1对肺泡上皮细胞钠离子通道α亚基(epithelial sodium channelα-subunit,α-ENaC)表达的调控及其可能的机制,并探讨其在急性肺损伤(acute lung injury,ALI)及急性呼吸窘迫综合征(acute respiratory distresssyndrome,AR... 目的研究Netrin-1对肺泡上皮细胞钠离子通道α亚基(epithelial sodium channelα-subunit,α-ENaC)表达的调控及其可能的机制,并探讨其在急性肺损伤(acute lung injury,ALI)及急性呼吸窘迫综合征(acute respiratory distresssyndrome,ARDS)中的作用。方法取对数生长期的A549细胞,用相同浓度的Netrin-1(500μg/L),分别作用0、3、6、12、24和48 h,用不同浓度的Netrin-1(0、0.5、5、50和500μg/L),作用12 h。将A549细胞分为药物组(500μg/LNetrin-1)、抑制组(1μmol/L PSB1115+500μg/L Netrin-1)和对照组(仅加RPMI1640培养基),培养12 h。RT-PCR法分别检测各组α-ENaC基因mRNA的转录水平;Western blot法检测各组α-ENaC蛋白的表达水平。结果相同浓度下,Netrin-1作用A549细胞6 h后,α-ENaC基因mRNA相对转录水平及蛋白相对表达量显著高于对照组(P<0.05),作用12 h时达最高;相同时间内,Netrin-1浓度大于5μg/L时,α-ENaC基因mRNA相对转录水平及蛋白的相对表达量均明显高于对照组(P<0.05),且呈剂量依赖性,浓度为500μg/L时达最高;药物组α-ENaC基因mRNA相对转录水平及蛋白相对表达量均明显高于对照组及抑制组(P<0.05),PSB1115可明显抑制α-ENaC基因mRNA的转录和蛋白表达。结论 Netrin-1可通过腺苷A2b受体途径,从基因水平上调α-ENaC的表达,有益于ALI及ARDS的预后。 展开更多
关键词 神经轴突生长导向因子 腺苷A2b受体 上皮细胞钢离子通道α亚基 呼吸窘迫综合征 急性肺损伤
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Exotic Beam for Direct Measurement of the 22^Mg+a
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作者 Nguyen Ngoc Duy Shiregu Kubono +9 位作者 Hidetoshi Yamaguchi David Kahl Takashi Hashimoto Shinsuke Ota Yasuo Wakabayashi Takashi Teranishi Yoong Hee Kim Joeng Soeg Song L.H. Khiem Jun Hu 《Journal of Physical Science and Application》 2013年第2期83-86,共4页
The scattering and resonance reactions of ^22Mg+p and ^22Mg+α play crucial roles for studying deeply not only in the structure of proton-rich nuclei of ^23A1 and ^26Si but also for the interest of astrophysics. It ... The scattering and resonance reactions of ^22Mg+p and ^22Mg+α play crucial roles for studying deeply not only in the structure of proton-rich nuclei of ^23A1 and ^26Si but also for the interest of astrophysics. It is believed that ^22Mg nucleus is a waiting point in the αp-process of nucleosynthesis in novae. We supposed to perform direct measurement the ^22Mg+α system in invert kinematics using radioactive ion (RI) beam. The ^22Mg beam of 3.73 MeV/u was produced at CRIB facility of the University of Tokyo located at RIKEN, Japan in 2011. In this paper, we report the results the scattering and resonance reactions with the alpha target. of the ^22Mg beam production used for the direct measurement of 展开更多
关键词 Radioactive ions stellar reaction CRIB nuclear astrophysics.
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Durability of calcium sulfoaluminate cement concrete 被引量:3
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作者 Bowen TAN Monday UOKORONKWO +1 位作者 Aditya KUMAR Hongyan MA 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2020年第2期118-128,共11页
Calcium sulfoaluminate cement(CSAC),first developed in China in the 1970 s,has received significant attention because of its expansive(or shrinkage-compensating)and rapid-hardening characteristics,low energy-intensity... Calcium sulfoaluminate cement(CSAC),first developed in China in the 1970 s,has received significant attention because of its expansive(or shrinkage-compensating)and rapid-hardening characteristics,low energy-intensity,and low carbon emissions.The production and hydration of CSAC(containing ye’elimite,belite,calcium sulfate,and minors)have been extensively studied,but aspects of its durability are not well understood.Due to its composition and intrinsic characteristics,CSAC concrete is expected to have better performance than Portland cement(PC)concrete in several aspects,including shrinkage and cracking due to restrained shrinkage,freeze-thaw damage,alkali-silica reaction,and sulfate attack.However,there is a lack of consensus among researchers regarding transport properties,resistance to carbonation,and steel corrosion protectiveness of CSAC concrete,all of which are expected to be tied to the chemical composition of CSAC and attributes of the service environments.For example,CASC concrete has poorer resistance to carbonation and chloride penetration compared with its PC counterpart,yet some studies have suggested that it protects steel rebar well from corrosion when exposed to a marine tidal zone,because of a strong self-desiccation effect.This paper presents a succinct review of studies of the durability of CSAC concrete.We suggest that more such studies should be conducted to examine the long-term performance of the material in different service environments.Special emphasis should be given to carbonation and steel rebar corrosion,so as to reveal the underlying deterioration mechanisms and establish means to improve the performance of CSAC concrete against such degradation processes. 展开更多
关键词 Calcium sulfoaluminate cement(CSAC) DURABILITY CARBONATION CHLORIDE Steel corrosion
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Microstructure change in deuterium implanted CLAM steel induced by electron irradiation
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作者 HUANG YiNa WAN FaRong +2 位作者 XIAO Xin OHNUKI Somei HASHIMOTO Naoyuki 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第1期111-114,共4页
As Reduced Activation Ferritic/Martensitic (RAFM) steel is considered the primary candidate for use as a structural material in fusion power reactors,many countries are developing different kinds of RAFM.China is deve... As Reduced Activation Ferritic/Martensitic (RAFM) steel is considered the primary candidate for use as a structural material in fusion power reactors,many countries are developing different kinds of RAFM.China is developing new CLAM (China Low Activation Martensitic) steel.The study investigates microstructural changes in CLAM steel implanted with deuterium ions induced by 1250 keV electron irradiation from R.T.to 873 K,and observes both the growth and shrinkage of the defect clusters produced by deuterium ion implantation under the electron irradiation. 展开更多
关键词 low activation steel DEUTERIUM irradiation damage dislocation loop VOID
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