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| 1 | Influence of Microstructure Refinement on Strain Strengthening Effect of Cu-Ag Alloy in situ Filamentary Composites显示文摘The Cu-10Ag and Cu-10Ag-RE (RE=Ce, Y) alloys in situ filamentary composites were prepared. The relationships of the ultimate tensile strengths (UTS) and microstructure changes of the composites were studied. With increasing of the true strain η, the sizes of the Ag filaments in the composites reduce according to a negative exponential function of η:d=d0·exp(-0.228η), and the UTS of the composites increase also according to a exponential function of η, σ Cu/Ag=σ 0(Cu)+[k Cu/Agd0 -1/2]exp(η/3), here d0 is a coefficient related to the original size of Ag phase. The strain strengthening follows a two-stage strengthening effect. The strengthening mechanisms are related to changes of microstructure in the deformation process. At the low true strain stage, the strengthening is mainly caused by the working hardening controlled by dislocation increasing; at the high true strain stage, the strengthening is mainly caused by the super-fine Ag filaments and the large coherent interfaces between the Ag filaments and Cu matrix. The trace RE additions and the rapid solidification obviously refine scales of the Ag filament of the composites, and therefore obviously increased the strain strengthening rate. The microstructure refinement of the composites, especially the refinement of Ag filament, is the main reason of the high strain strengthening effect in Cu-Ag alloy in situ filamentary composites. | Ning Yuantao, Zhang Xiaohui, Wu Yuejun(Kunming Institute of Precious Metals, Kunming 650221, Yunnan, China) | 2007 | 工程科学(英文版)2007，5，1： | 5 |
| 2 | METASTABLE EXTENSION OF SOLID SOLUBILITY OF RARE-EARTH ELEMENTS IN Al显示文摘The splat folis of Al-RE(RE=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Er and Yb)binary alloys of 0.04—0.06 mm thickness were made by are-melting and hammer-anviltechnique,the.cooling rate is in 106 K/s order of magnitude.The metastable extendedsolid solubilities of these RE elements have been evaluated by measurements of the latticespacings of the rapidly solidified(RS)Al-RE alloys,they are 0.4,0.15,0.21,0.21,0.3,0.5,0.1,0.6,0.65,0.7,0.75,0.2 at.-% for above individual RE clements,respectively.Thesecondary phase in RS Al-RE alloys were identified to be Al4RE for alloys containinglight RE and Eu elements and Al3 RE for alloys containing heavy RE and Y elements.Some factors influencing the extension of solid solubility of Al-RE alloy were discussed. | NING Yuantao ZHOU Xinming DAI Hong Institute of Precious Metals,Kunming,Yunnan,China | 1992 | Acta Metallurgica Sinica(English Letters)1992，5，11： | 2 |
| 3 | Alloying and strengthening of gold via rare earth metal additions显示文摘 | Yuantao Ning | 2001 | Gold Bulletin2001，34，3： | 1 |
| 4 | A new electrical contact alloy with high Reliability based on gold显示文摘 | Ning Yuantao Peng Ying Dai Hong | 2002 | Gold Bulletin2002，35，2： | 1 |
| 5 | Properties and applications of some gold alloys modified by rare earth additions显示文摘 | Ning Yuantao | 2005 | Gold Bulletin2005，38，1： | 1 |
| 6 | XRD STUDY OF RECOVERY PROCESS OF COLD DEFORMED Ag AND Ag-Ce ALLOY显示文摘XRDSTUDYOFRECOVERYPROCESSOFCOLDDEFORMEDAgANDAg-CeALLOYNINGYuantao;WENFei(KunmingInstituteofPreciousMetalsKunming650221.China)... | NING Yuantao WENFei(Kunming Institute of Precious Metals Kunming 650221.China) | 1996 | Acta Metallurgica Sinica(English Letters)1996，9，1： | 1 |
| 7 | A New Ehctricl Acontact Alloy with High Reliability Based on Gold显示文摘 | Peng Ying Dai Hong | 2002 | Cold Bulletin2002，35，2： | 1 |
| 8 | Pmpeaies and Application of Some Cold Alloys Modiifed by Rare Earth Additions显示文摘 | | 2005 | Gold Bulletin2005，38，1： | 1 |
| 9 | A new electrical contact alloy with high reliability based on gold显示文摘 | Ning Yuantao | 2002 | Gold Bulletin2002，35，2： | 1 |
| 10 | Platinum recovery by palladium alloy catchment gauzes in nitric acid plant显示文摘 | Ning Yuantao Yang Zhengfen Zhou Huaizhi | 1996 | Platinum Metals Rev1996，40，2： | 1 |
| 11 | Plati- num recovery by palladium alloy catchment gauzes in nitric acid plants显示文摘 | NING Yuantao YANG Zhengfen ZHAO Huaizhi | 1996 | Platinum Met Rev1996，40，2： | 1 |
| 12 | Structure reconstruction in palladium alloy catchment gauzes显示文摘 | NING Yuantao | 1995 | Platinum Met Rev1995，39，1： | 1 |
| 13 | Chan- ges of composition and surface state of palladium - nickel alloy gauzes used in ammonia oxidation apparatus 显示文摘 | YANG Zhengfen NING Yuantao ZHAO Huaizhi | 1995 | J Alloys and Compounds1995，218，： | 1 |
| 14 | Platinum loss from alloy catalyst gauzes in nitric acid plants 显示文摘 | Ning Yuantao Yang Zhengfen | 1999 | Platinum Metals Rev1999，43，2： | 1 |
| 15 | Research on surface structure of catalyst and catchment used in nitric acid industry 显示文摘 | Ning Yuantao | 1998 | Science Foundation in China1998，6，1： | 1 |
| 16 | Changes ofcomposition and surface state of palladium-nickel alloygauzes used in ammonia oxidation apparatus 显示文摘 | Yang Zhenfen Ning Yuantao Zhao Huaizhi | 1995 | Journal ofalloys and compounds1995，218，： | 1 |
| 17 | Platinum recovery by palladium alloy catchment gauzes in nitric acid plant显示文摘 | Ning Yuantao Yang Zhengfen Zhou Huaizhi | 1996 | Platinum Metals Rev1996，40，2： | 1 |
| 18 | Strengthening platinum-palladium-rhodium alloys by ruthenium and cerium additions显示文摘 | Ning Yuantao Hu Xin | 2003 | Platinum Metal Rev2003，47，3： | 1 |
| 19 | A new electrical contact materials with high reliability based on gold 显示文摘 | Ning Yuantao Ping Ying Dai Hong | 2002 | Gold Bulletin2002，35，3： | 1 |
| 20 | Influence of Gd addtion on the structure and propertiesof Au - Ni and Au - Ni - Cr alloys 显示文摘 | Ning Yuantao | 2006 | Gold Bulletin2006，39，4： | 1 |
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