检索结果-南通市图书馆

PREPARATION　OF　AMORPHOUS　Mo_5Si_3　BY　MECHANICAL　ALLOYING　AND　THE　CRYSTALliZATION

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1995年第4期5卷 118-121页

作者： li, Mingwei Tang, Renzheng li, wenxian Central South Univ of Technology Changsha China

ＰＲＥＰＡＲＡＴＩＯＮＯＦＡＭＯＲＰＨＯＵＳＭｏ_５Ｓｉ_３ＢＹＭＥＣＨＡＮＩＣＡＬＡＬＬＯＹＩＮＧＡＮＤＴＨＥＣＲＹＳＴＡＬＬＩＺＡＴＩＯＮＬｉＭｉｎｇｗｅｉ；ＴａｎｇＲｅｎｚｈｅｎｇ；ＬｉＷｅｎｘｉａｎ（Ｄｅｐａｒ... 详细信息

ＰＲＥＰＡＲＡＴＩＯＮＯＦＡＭＯＲＰＨＯＵＳＭｏ_５Ｓｉ_３ＢＹＭＥＣＨＡＮＩＣＡＬＡＬＬＯＹＩＮＧＡＮＤＴＨＥＣＲＹＳＴＡＬＬＩＺＡＴＩＯＮＬｉＭｉｎｇｗｅｉ；ＴａｎｇＲｅｎｚｈｅｎｇ；ＬｉＷｅｎｘｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳ...

关键词： amorphous alloy mechanical alloying Mo5Si3 crystallization

MICROSTRUCTURES AND MECHANICAL PROPERTIES OF RAPIDLY SOliDIFIED Al-Fe-Cr-Zr-V-Si ALLOY AND THEIR THERMAL STABIliTY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第3期8卷 122-125页

作者： Xiao, Yude li, Songrui li, wenxian Wang, Richu Central South Univ of Technology Changsha China

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍｅｃｈａｎｉｃａｌｐｒｏｐｅｒｔｉｅｓｏｆｔｈｅｃｏｎｖｅｎｔｉｏｎａｌａｅｒｏｎａｕｔｉｃａｌｈｉｇｈｓｔｒｅｎｇｔｈａｌｕｍｉｎｉｕｍａｌｌｏｙｓｄｅｇｅｎｅｒａｔｅｒａｐ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍｅｃｈａｎｉｃａｌｐｒｏｐｅｒｔｉｅｓｏｆｔｈｅｃｏｎｖｅｎｔｉｏｎａｌａｅｒｏｎａｕｔｉｃａｌｈｉｇｈｓｔｒｅｎｇｔｈａｌｕｍｉｎｉｕｍａｌｌｏｙｓｄｅｇｅｎｅｒａｔｅｒａｐｉｄｌｙｗｈｅｎｔｈｅｔｅｍｐｅｒ...

关键词： rapid solidification powder metallurgy heat resistant aluminium alloy Al Fe Cr Zr V Si

Research Progress of Electromagnetic Properties of MgB2 Induced by Carbon-Containing Materials Addition and Process Techniques

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2020年第4期33卷 471-489页

作者： Jiancheng li Haobo liu Ying li Chuanbing Cai Shixue Dou wenxian li Institute of Materials Laboratory for MicrostructuresSchool of Materials Science and EngineeringShanghai University149 Yanchang RoadShanghai 200072China Institute for Sustainable Energy Shanghai University99 Shangda RoadShanghai 200444China Institute for Superconducting and Electronic Materials University of WollongongWollongongNSW 2522Australia Shanghai Key Laboratory of High Temperature Superconductors 99 Shangda RoadShanghai 200444China

For the high transition temperature(Tc) and low cost taking both raw materials and fabrication process into account,MgB2 has been a competitive candidate to replace the conventional NiTi superconductor for high-temperature application in fault current limiters,transformers,motors,magnetic resonance imaging,adiabatic demagnetization refrigerators,generators,*** carbon-containing materials addition induced high critical current density(Jc) is reviewed based on their influences on the upper critical field(Hc2),flux pinning force,and *** doping effects were compared in the overview focusing on SiC,organic dopants,and graphene-related *** doping is featured for the high-field critical current density,which is caused by the increased Hc2 attributed to the substitution of carbon on boron site and the strong flux pinning force offered by the nanosized secondary phases in the MgB2 *** dopants have the advantage over SiC dopant for their relatively homogeneous distribution in the MgB2 matrix based on wet mixing of the organics and the raw boron *** doping level of two-dimensional materials can improve the superconducting properties in all measured fields because of the combined advantages of carbon substitution effect and grain ***2 fabricated with carbon-encapsulated boron also introduces strong flux pinning centers in MgB2,which show weak destruction of the connectivity of the MgB2 grains as reflected by the low-magnetic-supercurrent ***-pressure treatment and diffusion method can fabricate highdensity MgB2 superconductors with better connectivity and increase the Jc compared with the in situ and ex situ methods.

关键词： Critical current density(J_c) Flux pinning Doping 2D flux pinning centers

HARDENING　OF　RAPID　SOliDIFICATION　Al－Fe－V－Si　ALLOY　EXPOSED　AT　ELEVATED　TEMPERATURE

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1996年第4期6卷 130-132页

作者： Xu, Yiheng Long, Chunguang li, Songrui li, wenxian Yang, Shibao Central South Univ of Technology Changsha China

ＨＡＲＤＥＮＩＮＧＯＦＲＡＰＩＤＳＯＬＩＤＩＦＩＣＡＴＩＯＮＡｌ－Ｆｅ－Ｖ－ＳｉＡＬＬＯＹＥＸＰＯＳＥＤＡＴＥＬＥＶＡＴＥＤＴＥＭＰＥＲＡＴＵＲＥ￥ＸｕＹｉｈｅｎｇ；ＬｏｎｇＣｈｕｎｇｕａｎｇ；ＬｉＳｏｎｇｒｕｉ；Ｌ... 详细信息

ＨＡＲＤＥＮＩＮＧＯＦＲＡＰＩＤＳＯＬＩＤＩＦＩＣＡＴＩＯＮＡｌ－Ｆｅ－Ｖ－ＳｉＡＬＬＯＹＥＸＰＯＳＥＤＡＴＥＬＥＶＡＴＥＤＴＥＭＰＥＲＡＴＵＲＥ￥ＸｕＹｉｈｅｎｇ；ＬｏｎｇＣｈｕｎｇｕａｎｇ；ＬｉＳｏｎｇｒｕｉ；ＬｉＷｅｎｘｉａｎ；ＹａｎｇＳｈｉｂ...

关键词： rapid solidification cluster Al alloy for elevated temperature applications

MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPUN PIPE BLANKS OF RS AlFeX ALLOY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第1期8卷 103-107页

作者： Xiao, Yude li, wenxian li, Songrui Wang, Ricu Luo, Qingying Central South Univ of Technology Changsha China

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＡＮＤＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＯＦＳＰＵＮＰＩＰＥＢＬＡＮＫＳＯＦＲＳＡｌＦｅＸＡＬＬＯＹ①ＸｉａｏＹｕｄｅ，ＬｉＷｅｎｘｉａｎ，ＬｉＳｏｎｇｒｕｉａｎｄＷａｎｇＲｉｃｕ... 详细信息

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＡＮＤＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＯＦＳＰＵＮＰＩＰＥＢＬＡＮＫＳＯＦＲＳＡｌＦｅＸＡＬＬＯＹ①ＸｉａｏＹｕｄｅ，ＬｉＷｅｎｘｉａｎ，ＬｉＳｏｎｇｒｕｉａｎｄＷａｎｇＲｉｃｕＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒ...

关键词： aluminum alloy extrusion rapid solidification spray deposition

Effect of trace Sc and Zr on aging behavior and tensile properties of 2618 alloy

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第3期9卷 593-598页

作者： Yu Kun(余琨) li Songrui(李松瑞) li wenxian(黎文献) Xiao Yude(肖于德) Cent S Univ Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

The aging behavior of 2618 (Al Cu Mg Fe Ni) alloy added trace Sc and Zr was studied by Vicker’s hardness measurement at 200 and 300 ℃, and the tensile properties(yield strength, ultimate tensile strength and elongation) of alloys were measured at 20, 200, 250 and 300 ℃. The microstructures were observed by using optical microscope, SEM and TEM. It was found that the addition of Sc and Zr to 2618 alloy resulted in a uniform distribution of fine coherent Al 3(Sc,Zr) precipitates which had obvious aging hardening effect and made the S’ phase precipitate more homogeneously. The strength of alloy increased at ambient and elevated temperature without a decrease of ductility because of the precipitation strengthening and thermal stability of Al 3(Sc,Zr) particles. The ductile fracture of alloy occurred by microviod nucleation, growth and coalescence, so the microvoid coalescence was the dominant fracture mechanism. Al 3(Sc,Zr) particles could inhabit the recrystallization process of alloy 2618.

关键词： scandium zirconium addition 2618 alloy tensile property

Discovery of orthorhombic perovskite oxides with low thermal conductivity by first-principles calculations

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2022年第10期11卷 1596-1603页

作者： Yuchen liU Kaili CHU Yu ZHOU Yiran li wenxian li Bin liU Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China School of Materials Science and Engineering University of New South WalesSydney 2052Australia

Orthorhombic perovskite oxides are studied by high-throughput first-principles calculations to explore new thermal barrier coating(TBC)materials with low thermal *** mechanical and thermal properties are predicted for 160 orthorhombic perovskite *** average atomic volume is identified as a possible predictor of the thermal conductivity for the perovskite oxides,as it has a good correlation with the thermal *** compounds,i.e.,LaTmO_(3),LaErO_(3),LaHoO_(3),SrCeO_(3),and SrPrO_(3),having thermal conductivities under 1 W·m^(-1)·K^(-1) and good damage tolerance,are proposed as novel TBC *** obtained data are expected to inspire the design of perovskite oxide-based TBC materials and also support their future functionality investigations.

关键词： first-principles calculations perovskite oxide thermal conductivity mechanical property

Rare earth doping effects on superconducting properties of MgB_2:A review

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2019年第2期37卷 124-133页

作者： wenxian li Jixiang Kang Siwei Fu Yemin Hu Pengfei Hu Mingyuan Zhu Ying li Institute of Materials & Laboratory for Microstructures School of Materials Science and Engineering Shanghai University Institute for Sustainable Energy Shanghai University Shanghai Key Laboratory of High Temperature Superconductors Physics Department Shanghai University

Rare earth(RE) elements and their compounds have been doped into MgB_2 since the discovery of the superconductivity of MgB_2. The doping effects of RE elements and RE compounds are summarized in terms of different doping methods and the accompanying variations in the superconducting transition temperature, upper critical field, irreversibility field, and critical current density(Jc). Conclusions are drawn on the doping mechanisms to demonstrate the possibility of improvement of Jcin the future. REBy phase inclusions are observed in MgB_2 as nano-pinning centers with significant enhancement of Jcin MgB_2 doped with Y, La, Dy, Ho, Nd, etc. Furthermore, some REs with larger magnetic moments will provide more efficient flux pinning centers with larger pinning forces, which is different with the doping effects and mechanism of ferromagnetic transition metals in MgB_2. The co-doping effects of RE with other dopants are also reviewed due to the multiple advantages of different doping mechanisms.

关键词： Rare earth Critical current density(Jc) Flux pinning Doping

The component-activity interrelationship of cobalt-based bifunctional electrocatalysts for overall water splitting:Strategies and performance

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第4期91卷 453-474页

作者： Mingjie Sun Riyue Ge Sean li liming Dai Yiran li Bin liu wenxian li School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong SAR 999077China School of Materials Science and Engineering University of New South WalesSydneyNew South Wales 2052Australia UNSW Materials&Manufacturing Futures Institute UNSW SydneyNew South Wales 2052Australia School of Chemical Engineering University of New South WalesSydneyNew South Wales 2052Australia

Cobalt-based electrocatalysts take advantage of potentially harmonizable microstructure and flexible coupling effects compared to commercial noble metal-based catalytic ***,conventional water electrolysis systems based on cobalt-based monofunctional hydrogen evolution reaction(HER)or oxygen evolution reaction(OER)catalysts have certain shortcomings in terms of resource utilization and *** contrast,cobalt-based bifunctional catalysts(CBCs)have attracted much attention in recent years for overall water splitting systems because of their practicality and reduced preparation cost of *** review aims to address the latest development in CBCs for total *** main modification strategies of CBCs are systematically classified in water electrolysis to provide an overview of how to regulate their morphology and electronic ***,the catalytic performance of CBCs in total-hydrolysis is summarized according to the types of cobalt-based phosphides,sulfides and oxides,and the mechanism of strengthened electrocatalytic ability is emphasized through combining experiments and theoretical *** efforts are finally suggested to focus on exploring the dynamic conversion of reaction intermediates and building near-industrial CBCs,designing advanced CBC materials through micro-modulation,and addressing commercial applications.

关键词： Cobalt Bifunctional electrocatalysis Water splitting Modification strategies Electrocatalytic performances