文章信息/Info

Title:

Exploration of Decimeter-Sized High-Purity Magnesium Single Crystal Preparation Based on Melt Controlled-Speed Drop Casting

文章編號:

1674-3962(2024)11-0981-07

作者:

劉博宇; 黃鑫垚; 馬欣金; 鄭芮; 李峣峰; 李玖章; 肖鵬; 單智偉

1. 西安交通大學 金屬材料強度國家重點實驗室， 陜西 西安 710049 2. 西安交通大學 陜西省鎂基新材料工程研究中心， 陜西 西安 710049 3. 西安交通大學材料科學與工程學院，陜西 西安 710049

Author(s):

LIU Boyu; HUANG Xinyao; MA Xinjin; ZHENG Rui;  LI Yaofeng; LI Jiuzhang; XIAO Peng; SHAN Zhiwei

1.State Key Laboratory for Mechanical Behavior of Materials，Xi’an Jiaotong University，Xi’an 710049，China 2.Engineering Research Center for Magnesium-Based New Materials，Xi’an Jiaotong University，Xi’an 710049，China et al.

關鍵詞:

高純鎂; 單晶; 熔體控速滴鑄法; 晶體生長

Keywords:

high-purity magnesium; single crystal; melt controlled-speed drop casting; crystal growth

分類號:

TG146.22;TB31

DOI:

10.7502/j.issn.1674-3962.202404016

文獻標志碼:

A

摘要:

金屬鎂具有密排六方晶體結構，其力學性能和物理化學性能具有明顯的各向異性。高純鎂單晶是研究鎂沿不同晶向的力學性能、腐蝕行為及導電導熱等物理化學性能的理想材料。目前，高純鎂單晶常需進口，其價格昂貴，購買手續繁瑣，且所能購置的單晶尺寸一般為厘米級甚至更小，難以滿足批量化的力學和物理性能測試需求。提出了一種基于熔體控速滴鑄法的高純鎂單晶生長方法，并探索了原料純度、結晶坩堝結構及溫度設置等因素對晶體生長的影響規律。應用該方法及裝置，成功制備了純度為99��99%（質量分數）的分米級尺寸高純鎂單晶體。

Abstract:

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, high-purity magnesium single crystals often need to be imported, which are expensive, and the purchase procedures are complicated and time�瞔onsuming. 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.