Mg_2Ni纳米晶储氢材料的机械合金化制备工艺研究  

Investigation of the Preparation of Mg_2Ni Nanocrystalline Hydrogen-storage Materials by Mechanical Alloying

作　　者：张玲[1] 彭述明[1] 晏洪波[1] 罗顺忠[1] 龙兴贵[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《材料科学与工程学报》2004年第4期534-538,共5页Journal of Materials Science and Engineering

基　　金：中国工程物理研究院双百人才工程基金资助项目 ;国家自然科学基金重点资助项目 (50 1 2 1 0 50 )

摘　　要：利用机械合金化方法制备了Mg2 Ni纳米晶粉末 ,根据不同球磨参数下样品的X射线衍射结果 ,分析了球磨过程中相组成、粉末晶粒度等的变化 ,研究了球磨时间、球磨转速、过程控制剂等工艺条件对粉末晶粒度、机械合金化程度的影响。结果表明 :在较高的转速下进行循环变速运行并加入合适的过程控制剂可以使生成Mg2 Ni的时间提前 ,完全合金化的过程缩短 ,得到的Mg2 Ni晶粒度为 10nm左右。对Mg2 Ni纳米晶粉末进行了初步的贮氢性能研究 ,结果表明 :机械合金化制备的样品在室温下即可吸氢 ,贮氢性能较之传统材料有较大改善。Mg 2Ni nanocrystalline powder has been synthesized by mechanical alloying. X-ray diffraction results for samples of various milling parameters have been used to analysis the change of phase and particle size and so on during the milling process. The effect of milling time, speed and process control agent on the particle size of the powder and MA process has also been studied. According to the results, the cycle operation with higher rotary speed and suitable PCA(process control agent) can bring forward of the production of Mg 2Ni and the total time of finishing MA is shortened. The particle size of Mg 2Ni is about 10nm. The hydrogen storage property of Mg 2Ni nanocrystalline powder was preliminary studied. The results show that the sample prepared by mechanical alloying can absorb hydrogen even at ambient temperature, its hydrogen storage properties were better than the materials prepared by conventional methods.

关 键 词：MG2NI 纳米晶粉末 机械合金化 Mg2Ni合金 晶粒度 贮氢性能 

分 类 号：TB383[一般工业技术—材料科学与工程] TG139.7[金属学及工艺—合金]