C15 Laves RFe_2化合物氢诱导非晶化转变的热分析

• 作 者: 地里夏提·买买提 玉素甫艾力 青木清
• 机 构: 新疆大学资源与环境科学学院,新疆石油学院机械系,新疆大学资源与环境科学学院,日本北见工业大学工学部 新疆乌鲁木齐830046亚生江,乌鲁木齐830046,新疆乌鲁木齐830046
• 出 处: 新疆大学学报(自然科学版)
• 发表日期: 2005年04期
• 关键词: 非晶化 C15Laves相 非晶质 反应能 差示热分析 化合物 稀有金属 吸氢 晶化过程 非晶相

在氢气氛中对C 15 L aves RF e2(R=Y,C e,Sm,G d,T b,D y,Ho,E r)化合物利用差示热分析(DSC)法、X—ray衍射(XRD)法进行了热力学分析及氢分析.发现RF e2相(R=Y,C e,Sm,G d,T b,D y)随温度的升高出现吸氢、氢诱导非晶化(H IA)、RH2的沉淀析出及非晶相的晶化过程.当R=C e时,吸氢及非晶化(H IA)是同时进行的;当R=E r时,非晶化(H IA)及E rH2的沉淀析出是同时进行的.同时对RF e2在氢气氛加热过程中的焓变(ΔH)及反应能(ΔE)的变化通过差示热分析(DSC)进行评价.

The compounds of C 15 L aves RF e2 (R═Y, C e, Sm, G d, T b, Dy, Ho, E r) were characterized by differential thermal analysis (DSC), X-ray diffraction (XRD) method was used to conduct thermodynamic analysis and hydrogen analysis. It was found that hydrogen absorption and hydrogen induced amorphization (R = Y, Ce, Sm, Gd, Tb, Dy) H IA), precipitation of RH2 and crystallization of amorphous phase.When R = C e, hydrogen absorption and amorphization (H IA) are simultaneously carried out. When R = E r, amorphization H IA) and E rH2 were precipitated simultaneously, and the change of enthalpy change (ΔH) and reaction energy (ΔE) of RF e2 during the hydrogen atmosphere heating was evaluated by differential thermal analysis (DSC).