The phase diagram of the Ca-Si system

被引：97

作者：

Manfrinetti, P ^{[1
]}

Fornasini, ML ^{[1
]}

Palenzona, A ^{[1
]}

机构：

[1] Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy

来源：

INTERMETALLICS | 2000年 / 8卷 / 03期

关键词：

silicides; various; crystallography; phase diagram;

D O I：

10.1016/S0966-9795(99)00112-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase diagram of the Ca-Si system has been investigated across almost the whole composition range (0 to 70 at% Si) using differential thermal analysis, metallographic analysis, X-ray diffraction and electron microscopy. Six intermediate phases have been found: CaSi2 (CaSi2-type), Ca14Si19 (Ca14Si19-type), Ca3Si4 (Ca3Si4-type), CaSi (CrB-type), Ca5Si3 (Cr5B3-type) and Ca2Si (anti-PbCl2-type). Ca3Si4, not previously known, is a Zintl phase representative of a new structural type: hexagonal hP42, a = 854.1, c = 1490.6 pm, space group P6(3)/m. Three eutectics occur in this system: at about 3.5 at% Si and 795 degrees C, 42.5 at% Si and 1230 degrees C, 72.0 at% Si and 1020 degrees C. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：223 / 228

页数：6

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