金属学报  1995, Vol. 31 Issue (1): 1-6

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Al-Cu-Co-Ge十边形准晶单晶的定向生长

陈立凡;陈熙琛

中国科学院物理研究所

Al-Cu-Co-Ge SINGLE DECAGONAL QUASICRYSTALS GROWTH BY DIRECTIONAL SOLIDIFICATION

CHEN Lifan;CHEN Xichen;(Institute of physics;Chinese A cademy of Sciences;Beijing 100080)(Manuscript received 94-07-05)

陈立凡;陈熙琛. Al-Cu-Co-Ge十边形准晶单晶的定向生长[J]. 金属学报, 1995, 31(1): 1-6.
, . Al-Cu-Co-Ge SINGLE DECAGONAL QUASICRYSTALS GROWTH BY DIRECTIONAL SOLIDIFICATION[J]. Acta Metall Sin, 1995, 31(1): 1-6.

摘要 参考文献 相关文章 Metrics 全文: PDF(501 KB)   摘要: 利用控制凝固过程的定向凝固技术生长出了直径０．８长１０ｍｍ的Ａｌ－Ｃｕ－Ｃｏ－Ｇｅ十边形准晶单晶．在准晶生长过程中，所有准晶单晶形成了单一取向的择优生长结构，其棱柱的中心轴为十次旋转对称轴．在温度梯度为９５℃／ｃｍ的条件下，随着定向凝固速度的增大，生长界面出现的成分过冷越来越大，从而导致生长界面的扰动也逐渐加剧并使成分偏析，界面形态由平面向胞状和树枝状转化，出现大量非准晶相，最后无法生长出所需要的高质量准晶单晶． 关键词 ： 十边形准晶单晶,  定向生长,  Ａｌ－Ｃｕ－Ｃｏ一Ｇｅ合金     Abstract：The large single decagonal quasicrystals of 0.8 mm in diameter and 10 mm in length in Al-Cu-Co-Ge alloy have been obtained by controlled unidirectional solidification.In the process of growth, all of the single quasicrystals grew preferentially along uni-orientation of solidification.The centre axis of quasicrystalline prisms is the tenfold rotational symmetry axis. Under the condition of temperature gradient about 95℃/ cm,the segregation will be occurred and the growing interface will be changed from planar structure into cellular and/ or dendritic one with increasing directional solidification rate.and a large number of crystalline phases will be produced. Thus,it seems to be no means of growing required single quasicrystals of high quality.Correspondent:CHEN Lifan, Institute of physics,Chinese Academy of Science, Beijing 100080 Key words： single decagonal quasicrystal    directional solidification    Al-Cu-Co-Ge alloy 收稿日期: 1995-01-18      基金资助:国家自然科学基金;;中国科学院青年基金 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈立凡 陈熙琛 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1995/V31/I1/1 1DubostB,LangJM,TanakaM,SainfortP,AudierM．Nature,1986;324(6092):482LangJM,AudierM,DubostB,SainfortP,AudierM．J CrystGrowth,1987;83:4563TsaiAP,InoueA,MasumotoT．JpnAppl,phys1987;26:L15054IshimasaT,MoriM．PhilosMagLett,1990;62:3575HeLX,WuYK,MengXM,KuoKH．PhilosMagLett,1990;61:156YokoyamaY,TsaiAP,InoueA,MasumotoT．MaterTransJIM,1991;32:10897陈立凡．中国科学院物理研究所博士学位论文,1992z No related articles found! Viewed Full text Abstract Cited   Shared      Discussed