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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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
