金属学报  1987, Vol. 23 Issue (4): 341-343

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Al-Si共晶合金变质机理的探讨(Ⅲ)——模拟系Zn-Ge共晶变质的研究

刘淑祺;张启运;陈云林

北京大学化学系;北京大学化学系;北京大学化学系

THE MODIFICATION OF Si PHASE IN Al-Si EUTECTIC ALLOYS (III)——A Comparative Study on Modification of Model System Zn-Ge

by LIU Shuqi; ZHANG Qiyun; CHEN Yunlin (Department of Chemistry; Peking University) (Manuscript received 30 December; 1985; revised manuscript 22 September; 1986)

刘淑祺;张启运;陈云林. Al-Si共晶合金变质机理的探讨(Ⅲ)——模拟系Zn-Ge共晶变质的研究[J]. 金属学报, 1987, 23(4): 341-343.
, , . THE MODIFICATION OF Si PHASE IN Al-Si EUTECTIC ALLOYS (III)——A Comparative Study on Modification of Model System Zn-Ge[J]. Acta Metall Sin, 1987, 23(4): 341-343.

摘要 参考文献 相关文章 Metrics 全文: PDF(651 KB)   摘要: <正> 用金相及扫描电镜方法对比A1-Si系研究了Zn-Ge系的显微结构,发现慢冷条件下出现八面体顶角相联的链状Ge共晶结构,这与凝固时液态Zn粘度很大有关.在研究了一系列变质剂的 Abstract：A comparative study of Zn-Ge eutectic with Al-Si system has been made by metallography and SEM. It is found that the chain Ge crystals connected each other with top corner of octahedrons formed in this system at lower cooling-rate solidification. This is believed to be effect of high viscosity in molten Zn matrix. Meanwhile, the effects of microamount Li, Na, Mg, Ca, Sr, Ba and La on microstructures of Zn-Ge eutectic were also scanned, Modified structures obtained only with additions of Na, Sr, La and Ba. Among those modifiers, Sr is the strongest, and the weakest is Ba. Modified structure of eutectic Ge were also in the form of chain crystals something like that in the mentioned blank system but smaller in the size. The appearance of modified Ge is quite different from that modified Si in Al-Si system. To these more equilibrium eutectic crystals, it is deduced that modifiers denucleated the melt, and eutectic Ge was solidified under a supercooling condition. Compared to the facts in system Zn-Ge, the modification of Al-Si eutectic was discussed as a multiple effects. 收稿日期: 1987-04-18      基金资助:中国科学院科学基金资助的课题 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 刘淑祺 张启运 陈云林 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I4/341 1 张启运,郑朝贵,韩万书.金属学报,1981;17:130 2 张启运,刘淑祺,樊晓红.金属学报,1982;18:581 3 张启运,刘淑祺,胡佳.金属学报,1984;20:A138 4 郑朝贵,姚连克,张启运.金属学报,1982;18:661 5 Sahoo M, Smith R W.J Mater Sci, 1976; 11: 1125 6 Smithells C J. Metals Reference Book, 5th ed, London: Butterworths, 1976:944, 946 7 朱培钺,陈熙琛,贾均,张宝书,刘贤功.哈尔滨工业大学学报,1981;(1) :1 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed