研究了(Ti-Cr)10V55Zr5储氢合金在真空热处理(1473 K下保温2 h和6 h)改性前后的相结构及储氢性能.XRD及SEM分析表明,(Ti-Cr)40V55Zr5铸态合金由BCC结构的固溶体主相和ZrCr2基第二相组成;经过热处理后,合金的BCC主相的晶胞体积有所增大,除了BCC主相和ZrCr2基第二相外,还出现微量的富Ti第三相.储氢性能测试表明,热处理后(Ti-Cr)40V55Zr5合金的动力学性能和活化性能均得到改善,室温最大吸氢量略微降低,但P-C-T曲线放氢压力平台倾斜度降低,平台宽度稍有增大,80℃有效放氢量增大.研究表明,在1473 K下经2 h热处理改性的(Ti-Cr)40V55Zr5合金具有较好的综合性能,首次吸氢即可活化,室温吸氢量为401 ml·g-1,80℃有效放氢量达到240 ml·g-1.
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