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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Thermal analysis of hydrogen-induced amorphization in C15 Laves Rfe_2 compounds
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Thermal analysis of hydrogen-induced amorphization in C15 Laves Rfe_2 compounds

机译：氢诱导C15 Laves Rfe_2化合物非晶化的热分析

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摘要

Structural changes of C15 Laves Rfe_2 (R=Y, Ce, Sm Gd, Tb, Dy, Ho and Er) compounds during thermal analysis in an H_2 atmosphere were investigated by scanning differential calorimetry (DSC), powder X-ray diffraction (XRD) and hydrogen analysis. Hydrogen absorption, hydrogen-induced amorphization (HIA), precipitation of RH_2 and crystallization of an amorphous phase occurred with increasing temperature for R=Y, Sm Gd, Tb, Dy and Ho. Hydrogen absorption and HIA occurred simultaneously for R=Ce, while HIA and precipitation of ErH_2 occurred simultaneously for R=Er. The enthalpy change #DELTA# H and the activation energy #DELTA# E for thermal reactions of Rfe_2 during heating in a hydrogen atmosphere were evaluated by DSC.
机译：通过扫描差示热分析（DSC），粉末X射线衍射（XRD）研究了H15气氛中热分析期间C15 Laves Rfe_2（R = Y，Ce，Sm Gd，Tb，Dy，Ho和Er）化合物的结构变化和氢分析。随着温度的升高，R = Y，Sm Gd，Tb，Dy和Ho发生氢吸收，氢致非晶化（HIA），RH_2沉淀和非晶相结晶。 R = Ce同时发生氢吸收和HIA，R = Er同时发生HIA和ErH_2沉淀。通过DSC评价Rfe_2在氢气氛中加热期间的热反应的焓变＃DELTA＃H和活化能＃DELTA＃E。

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