采用电弧熔炼法合成LaNi3.5合金,在950 ℃、真空条件下对合金退火6和12 h.用XRD、SEM、In-situ XRD、P-C Isotherm表征合金的形貌结构和储氢性能.结果表明,铸态LaNi3.5合金中除了存在Ce2Ni7相之外,还有一定量的其他相.热处理后合金更加均匀,Ce2Ni7相含量增加.60 ℃和3 MPa条件下,LaNi3.5合金的吸氢量～0.35H/M,在第一次吸氢过程中,并未出现明显的两相平台.原位衍射测试结果表明,LaNi3.5合金吸氢后呈现明显的各相异性膨胀.
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