The Ho-Sn (holmium-tin) system

被引：9

作者：

Bulanova, MV ^{[1
]}

Eremenko, VN ^{[1
]}

Petjukh, VM ^{[1
]}

Sidorko, VR ^{[1
]}

机构：

[1] IN Frantsevich Inst Problems Mat Sci, UA-252180 Kiev, Ukraine

来源：

JOURNAL OF PHASE EQUILIBRIA | 1998年 / 19卷 / 02期

关键词：

D O I：

10.1361/105497198770342599

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 Ho-Sn phase diagram was established by means of differential thermal, x-ray, and microscopic analyses of 23 as-cast alloys. Seven intermetallics were found to form in the system. Ho5Sn3 melts congruently at 1915 degrees C. The intermetallics Ho5Sn4, Ho11Sn10, Ho4Sn5 HoSn2, Ho2Sn5, HoSn3 form in peritectic reactions at 1720 +/- 13, 1592 +/- 11, 1114 +/- 11, 1114 +/- 15, 509 +/- 12, and 420 degrees C, respectively. Compounds Ho5Sn4 and Ho4Sn5 were observed for the first time. The Ho-rich eutectic crystallizes at 1252 +/- 11 degrees C and contains similar to 13 at. % tin. The solid solubility of Sn in Ho is about 2.5 at. % and that of Ho in Sn is negligible, The enthalpy of mixing of liquid Ho-Sn alloys was studied by calorimetric method, The limit enthalpy of dissolution of Ho in Sn was calculated to be -78.4 kJ/mol.

引用

页码：136 / 141

页数：6

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