氢化-脱氢制备的ZK60纳米晶镁合金粉体及其组织演化  

ZK60 Nanocrystalline Magnesium Alloy Powder Prepared by Hydrogenation-dehydrogenation and Their Microstructure Evolution

作　　者：许联林 樊建锋[1] 张华[1] 夏宗坤 董洪标[1] 许并社[1] 

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室先进镁基材料山西省重点实验室山西省新材料工程技术研究中心,山西太原030024

出　　处：《稀有金属材料与工程》2017年第10期2908-2914,共7页Rare Metal Materials and Engineering

基　　金：教育部新世纪优秀人才支持计划(NCET-12-1040);教育部科学技术研究重点项目(2012017);国家自然科学基金(50901048;51174143);山西省自然科学基金(2015011033;2015021073);山西省高等学校科技创新项目(2014118);山西省留学人员科技活动择优资助项目

摘　　要：通过研究温度、氢压和时间等对ZK60镁合金粉体氢化-脱氢过程的影响,开发了制备ZK60纳米晶镁合金粉体材料的新工艺。在探究ZK60合金粉体完全氢化-脱氢的基础上,采用XRD、OM、SEM以及TEM考察了氢化-脱氢前后镁合金粉体组织与结构演变。实验结果表明,ZK60合金粉体在氢化-歧化-脱氢-再复合(hydrogenation–disproportionation–desorption–recombination,HDDR)过程中,温度对其氢化-脱氢程度影响最大。可完全氢化的最佳技术为350℃时,2 MPa氢压下保温12 h,完全脱氢的最佳工艺是在350℃下抽高真空3 h。采用该工艺可将ZK60合金粉末的晶粒由160?m细化到20 nm左右。A new technology to manufacture nanocrystalline materials of ZK60 alloy powder was developed via studying the influence of hydrogenation temperature, hydrogen pressure and reaction time of the HDDR（hydrogenation-disproportionation-desorption-recombination） process on the course of hydrogen-desorption by XRD, OM, SEM and TEM. The microstructural evolution of the alloy powder was researched. Results show that the temperature plays an important role in the hydrogen-desorption process of ZK60 alloy. The optimal HD process for preparing nanocrystalline Mg alloy powders is that the alloy is hydrogenated at 350 °C under 2 MPa hydrogen pressure for 12 h and then dehydrogenated at 350 °C for 3 h in vacuum. The grain sizes of ZK60 alloy are refined to about 20 nm from 160 ？m.

关 键 词：HDDR ZK60合金 压力 温度 

分 类 号：TG146.22[一般工业技术—材料科学与工程]