Synthesis and characterization of nanocrystalline Ni produced by cryomilling in liquid nitrogen

查看全文 作　　者：YANG [1,2]Bin;FAN [3]Jianzhong;HAO [1]Bin;TIAN [3]Xiaofeng;CHENG [1]Junsheng;ZHANG [1]Jishan

机构地区：[1]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;[2]International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China;[3]National Engineering and Technology Research Center for Nonferrous Metals Composites, General Research Institute for Nonferrous Metals, Beijing 100088, China

出　　处：《Rare Metals》索引2007年第26卷第2期,共5页

基　　金：This project was financially supported by the High Technical Research and Development Programme of China (No. 2002AA302502). 摘　　要：Nanocrystalline Ni powders were successfully fabricated by mechanically milling at cryogenic temperature (cryomilling)with 1 wt.%Y2O3 particles. The experimental results have shown that the Ni grain size is reduced to 25 nm after 2 h of cryomilling in the presence of the Y2O3 particles. The cryomilled Ni/Y2O3 powders can maintain their nanocrystalline structure up to 900°C, or 62% of the melting point of Ni. A bulk nanocrystalline Ni/Y2O3 material with a thermally stable grain size of approximately 100 nm was produced by cryomilling, cold isostatic pressing, followed by hot isostatic pressing. The microhardness of bulk nanocrystalline Ni/1wt.%Y2O3 is 315 DPH, which is two times as high as that of conventional Ni. 关键词：纳米晶镍粉末合成特性低温研磨液氮

相关文献

参考文献（14）
引证文献（2）
耦合文献（0）

参考文献(14)

引证文献(2)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Synthesis and characterization of nanocrystalline Ni produced by cryomilling in liquid nitrogen

参考文献(14)

引证文献(2)

用户提示