Mg-50wt.%Ti_(1-x)C(x=0.1,0.2,0.3,0.4)合金的贮氢性能研究

Research on hydrogen storage properties of Mg-50wt.%Ti_(1-x)C_x(x=0.1,0.2,0.3,0.4)alloys

采用机械合金化方法制备Mg-50wt.%Ti1-xCx(x=0.1,0.2,0.3,0.4)贮氢合金。X-射线衍射(XRD)分析结果表明,合金主要由Mg、Ti、C以及二元合金相Ti2C0.06和Mg2C3组成,随着球磨时间增加,合金的非晶化程度提高。压强-成分-温度(PCT)测试结果显示,Mg-50wt.%Ti1-xCx(x=0.1,0.2,0.3,0.4)合金的贮氢量分别为2.96、2.95、2.76、2.6wt.%;随着碳含量的增加,样品吸氢量逐渐减少,放氢温度和平台压也随之下降;适当增加球磨时间可降低吸放氢温度。

Mg-50wt.%Ti1-xC（x=0.1,0.2,0.3,0.4） hydrogen storage alloys were prepared by using mechanical alloying. X-ray diffraction （XRD） results show that the alloy is mainly composed of Mg, Ti, C and binary alloy phase Ti/Co.06 and Mg2C3. The amorphous degree of alloys increases with the milling time. The pressure-composition-temperature （PCT） testing results show that the hy- drogen absorption capacity of the Mg-50wt.%Ti1-xC（x=0.1,0.2,0.3,0.4） alloys reaches to 2. 96,2.95,2.76 and 2.6wt. % respectively. All the hydrogen storage, the temperature of hydrogen decomposition and the plateau pressure decrease with C content. In addition, it was found that the temperature of hydrogen absorption and decomposition decreased somewhat with the milling time.