ELECTRON-MICROPROBE INVESTIGATION OF LOWER MELTING REGIONS IN THE AS-CAST STRUCTURE OF DS200 + HF SINGLE-CRYSTAL

被引：9
|
作者：
BALDAN, A
机构：
[1] Division of Materials Science and Technology, CSIR, Pretoria, 0001
来源：
JOURNAL OF MATERIALS SCIENCE | 1990年 / 25卷 / 10期
关键词：
D O I：
10.1007/BF00581093
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The elemental characteristics of incipient melting (or lower melting) regions in as-cast DS200 + Hf single crystal were investigated in detail. In addition to the Ni5Hf phase, the Ni7Hf2-type compound was observed to exist in the incipient melting regions. Ni7Hf2 and Ni5Hf showed considerable solubilities for chromium, cobalt and aluminium. Chromium and cobalt replace nickel in the INi7Hf2 phase. A large variability of composition was observed in the incipient melting regions. For example, nickel and hafnium contents varied between 27.35 and 59.94wt% and 14.47 and 54.87 wt%, respectively. © 1990 Chapman and Hall Ltd.
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页码：4341 / 4348
页数：8
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