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研究了机械球磨La1.8Ca0.2Mg14Ni3+x%Ti(质量分数,下同)(x=0,5,10)合金的微结构和储氢性能.气态吸放氢研究表明,加入钛粉球磨能有效提高合金的活化性能、储氢容量和吸放氢速率.铸态合金经过6次活化后,在613K时放氢量为4.12%(质量分数,下同).加Ti球磨改性10 h后,随着x增加,合金经过2次~3次循环基本完全活化,吸放氢性能也相应提高.Ti含量在.x=0,5,10时合金在613 K的放氢量分别为4.69%,4.80%,4.83%;当x=10时合金在373 K的吸氢量达到3%以上,在600 K经过2 min就能达到4.81%(为最大吸氢量的97%).微结构分析表明,具有表面催化活性的Ti粉与合金基体表面进行复合,并使合金发生部分非晶转变,能有效改善La1.8Ca0.2Mg14Ni3合金的储氢性能.

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