通过添加少量LaNi5对V以及V0.9Cr0.1合金进行有控制的机械合金化处理,改善了材料的活化性能.吸、放氢循环测试表明,吸、放氢循环超过100次并脱氢后,V和V0.9Cr0.1合金仍然保持单一bcc结构.随着吸、放氢循环的进行,V的吸、放氢平台压力不断增加,相同压力下吸氢量减小,且吸氢动力学有所下降.这与吸、放氢过程中晶格应变的降低和晶胞体积的减小有关.SEM观察表明,随着吸、放氢循环次数的增加,材料表面和内部形成大量的深裂纹,这对提高放氢平台压力和改善放氢动力学有促进作用.吸、放氢循环过程中,V比V0.9Cr0.1合金放氢容量衰减更快的原因是:吸、放氢循环前、后V的晶格应变降低和晶胞体积下降程度均比V0.9Cr0.1合金的要大,导致吸、放氢循环后V的吸氢量下降更大.
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