摘要
金属镁具有密排六方晶体结构,其力学性能和物理化学性能具有明显的各向异性。高纯镁单晶是研究镁沿不同晶向的力学性能、腐蚀行为及导电导热等物理化学性能的理想材料。目前,高纯镁单晶常需进口,其价格昂贵,购买手续繁琐,且所能购置的单晶尺寸一般为厘米级甚至更小,难以满足批量化的力学和物理性能测试需求。提出了一种基于熔体控速滴铸法的高纯镁单晶生长方法,并探索了原料纯度、结晶坩埚结构及温度设置等因素对晶体生长的影响规律。应用该方法及装置,成功制备了纯度为99.99%(质量分数)的分米级尺寸高纯镁单晶体。
Magnesium has a hexagonal close-packed(hcp)crystal structure,thus its mechanical and physical/chemical properties exhibit significant anisotropy along variant crystallographic orientations.High-purity magnesium single crystal is an ideal material for studying the mechanical properties,corrosion resistance,electrical and thermal conductivity,and other physical/chemical properties of magnesium along different crystallographic orientations.However,highpurity magnesium single crystals often need to be imported,which are expensive,and the purchase procedures are complicated and time-consuming.Moreover,the size of magnesium single crystal produced by current methods is generally with centimeter or even smaller.The present paper proposes a method for growing high-purity magnesium single crystals based on melt controlled-speed drop casting method.The effects such as raw material purity,crucible configuration,and temperature setting on crystal growth are studied.Using the proposed method,decimeter-sized high-purity magnesium single crystals with a purity of 99.99wt%are successfully produced.
作者
刘博宇
黄鑫垚
马欣金
郑芮
李峣峰
李玖章
肖鹏
单智伟
LIU Boyu;HUANG Xinyao;MA Xinjin;ZHENG Rui;LI Yaofeng;LI Jiuzhang;XIAO Peng;SHAN Zhiwei(State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China;Shaanxi Province Engineering Research Center for Magnesium-Based New Materials,Xi’an Jiaotong University,Xi’an 710049,China;School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《中国材料进展》
CAS
CSCD
北大核心
2024年第11期981-987,共7页
Materials China
基金
国家重点研发计划资助项目(2022YFB3709300)
国家自然科学基金资助项目(52371121,52031011,523B2001)。
关键词
高纯镁
单晶
熔体控速滴铸法
晶体生长
high-purity magnesium
single crystal
melt controlled-speed drop casting
crystal growth
