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将混合粉末Ni和Ti覆盖于纯Mg锭表面制备Mg基复合材料。此方法有利于吸/放氢相Mg_2Ni和催化相Ni Ti规则地生成与分布。纯Mg锭位于中心位置,而粉末Ni和Ti包覆于纯Mg锭表面。首先确定生成Mg_2Ni和Ni Ti的温度范围为600℃左右;根据此温度范围,计算在650℃和850℃Mg_2Ni和Ni Ti的晶粒尺寸,从而确定最优化的烧结温度;建立晶体结构模型,确定Mg_2Ni合金相主要分布在烧结体表面;最终实现了5 min放氢量为4wt%,实现了短时间内大放氢量的目的。
The mixed powder Ni and Ti coated pure Mg ingot surface preparation Mg-based composite material. This method is conducive to the absorption / desorption phase Mg_2Ni and Ni Ni catalytic phase regularly generated and distributed. The pure Mg ingot is located at the center, while the powders Ni and Ti are coated on the surface of the pure Mg ingot. Firstly, the temperature range of Mg_2Ni and NiTi was determined to be about 600 ℃. According to the temperature range, the grain size of Mg_2Ni and Ni_i at 650 ℃ and 850 ℃ was calculated to determine the optimal sintering temperature. The crystal structure model was established to determine The phase of Mg_2Ni alloy mainly distributes on the surface of the sintered body. Finally, the amount of discharged hydrogen is 4wt% in 5 min, which realizes the purpose of releasing large amount of hydrogen in a short period of time.