Phase equilibria of the La-Y system: A metastable samarium-type LaY intermetallic compound

被引：0

作者：

Wang, Haibo ^{[1
,2
]}

Chen, Huiming ^{[3
]}

Ma, Yue ^{[4
]}

Wang, Hang ^{[3
]}

机构：

[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China

[2] East China Jiaotong Univ, Inst Technol, Nanchang 330100, Jiangxi, Peoples R China

[3] Jiangxi Univ Sci & Technol, Inst Engn Res, Ganzhou 341000, Peoples R China

[4] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

THERMOCHIMICA ACTA | 2018年 / 661卷

关键词：

La-Y; Phase equilibria; Intermetallic compounds; Crystal structure; Metastable; YTTRIUM; ALLOYS;

D O I：

10.1016/j.tca.2018.01.013

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Rare earth elements are recently attracting more and more interests due to their dramatic effect as alloying elements. However the study regarding the phase equilibria between rare earth elements are still rare. The thermodynamically stable phases within the similar to 50 at.%Y region have been investigated for the La-Y binary system using differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy in the present work. The samarium-type delta-LaY has been found to be unstable while a pure Y phase with fcc crystal structure has been observed. A new invariant reaction has been determined to be bcc-(La,Y) + fcc-Y -> dhcp-(La,Y) at 717 +/- 3 degrees C.

引用

页码：41 / 50

页数：10

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