Al-Cu-Cr系准晶及其类似相的形成规律The formation regulation of quasicrystals and approximants in Al-Cu-Cr
齐育红,张占平,刘德良,马永庆,黑祖昆,杜学鹏
摘要(Abstract):
本文为了探明Al-Cu-Cr系准晶及其类似相的形成规律,以指导Al-Cu-Cr系准晶合金设计。通过分析研究用热压法制备的Al-Cu-Cr准晶与纯铝的复合材料中不同条件下形成的各个Al-Cu-Cr相的成分和结构,绘制了Al-Cu-Cr三元成份-结构相图,结果表明相图中存在两条等电子浓度线,一条是二十面体准晶及其类似相的等电子浓度线,电子浓度e/a=1.86;另一条是十次准晶及其类似相的等电子浓度线,电子浓度e/a=2.09。这充分证实了准晶及其类似相是电子相,服从Hume-Rothery规则。
关键词(KeyWords): Al-Cu-Cr合金;准晶;类似相;成份-结构相图;等电子浓度线
基金项目(Foundation):
作者(Author): 齐育红,张占平,刘德良,马永庆,黑祖昆,杜学鹏
参考文献(References):
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- [2]Dong C,Hume-Rothery phase with constant e/a volue and their related electronic properties in Al-Cu-Fe-(Cr) quasicrystalline systems,Mater.Sci.Forum,1994 150-151:403.
- [3]Mayou D,Cyrot-lackmann F,Trambly de Lassardiere G and Klein T,Electronic properties and the role old states in stable quasicrystals,J.Non-Cryst.Solids, 1993,153-154:412-415
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