Structure and phase transformation of melt-spun Gd5Si2Ge2

IMR OpenIR

	Structure and phase transformation of melt-spun Gd5Si2Ge2
	H. Fu; X. T. Zu; T. D. Shen
	2006
发表期刊	Thermochimica Acta
ISSN	0040-6031
卷号	445 期号:1 页码:53-56
摘要	Gd5Si2Ge2 materials were prepared by rapid solidification at different wheel speeds. The crystal phase and phase transformation of the rapidly solidified materials have been investigated by powder X-ray diffraction (XRD), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The materials contained mainly a Gd5Si2Ge2-type single phase at a wheel speed of 20 m/s; a Gd5Si4-type major phase and a Gd5Si2Ge2-type minor phase at 30 m/s; a Gd5Si4-type single phase at 40 m/s; and Gd5Si4-type and Gd5Si2Ge2-type double phase at 50 m/s. A first-order phase transformation occurred at approximately 273 K in the materials prepared at a wheel speed of 20 m/s whereas a second-order phase transformation appeared at approximately 290 K in the materials prepared at other wheel speeds. Furthermore, we observed some exothermic peaks located at similar to 250-300 degrees C in the DSC curves for all the melt-spun samples. These exothermic reactions can be attributed to the crystallization of a small amount of glassy phase. The presence of glassy phase has been confirmed by both the electron diffraction pattern observed in the TEM observation and the glass transition found in the DSC scan. (c) 2006 Published by Elsevier B.V.
部门归属	univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. los alamos natl lab, div mat sci & technol, los alamos, nm 87545 usa.;zu, xt (reprint author), univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china;xiaotaozu@yahoo.com
关键词	Magnetocaloric Materials Gd5si2ge2 Alloy X-ray Powder Diffraction Differential Scanning Calorimetry Gd5si4-gd5ge4 Transition System
URL	查看原文
WOS记录号	WOS:000238518900010
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34202
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Fu,X. T. Zu,T. D. Shen. Structure and phase transformation of melt-spun Gd5Si2Ge2[J]. Thermochimica Acta,2006,445(1):53-56.
APA	H. Fu,X. T. Zu,&T. D. Shen.(2006).Structure and phase transformation of melt-spun Gd5Si2Ge2.Thermochimica Acta,445(1),53-56.
MLA	H. Fu,et al."Structure and phase transformation of melt-spun Gd5Si2Ge2".Thermochimica Acta 445.1(2006):53-56.