对NdFeB合金的选择氢爆进行了研究. 研究表明, 在较低的环境温度和氢气压力下, 通过事先对合金中富Nd相的吸氢量进行理论计算并对放入容器内的NdFeB合金量进行定量控制, NdFeB合金在吸氢过程中完全可以实现良好的选择氢爆. SEM观察表明, 选择氢爆时其碎裂的方式均为沿晶断裂, 爆裂后粉末中的主相晶粒均是单晶粒子, Nd2Fe14B主相晶粒内均无裂纹形成. 与完全氢爆相比, 选择氢爆后的晶粒较粗大, 且较均匀, 但细小晶粒较少.
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