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(hào):

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(xué) 金屬材料強(qiáng)度國(guó)家重點(diǎn)實(shí)驗(yàn)室， 陜西 西安 710049 2. 西安交通大學(xué) 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(xué)材料科學(xué)與工程學(xué)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(guān)鍵詞:

高純鎂; 單晶; 熔體控速滴鑄法; 晶體生長(zhǎng)

Keywords:

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

分類號(hào):

TG146.22;TB31

DOI:

10.7502/j.issn.1674-3962.202404016

文獻(xiàn)標(biāo)志碼:

A

摘要:

金屬鎂具有密排六方晶體結(jié)構(gòu)，其力學(xué)性能和物理化學(xué)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(xué)性能、腐蝕行為及導(dǎo)電導(dǎo)熱等物理化學(xué)性能的理想材料。目前，高純鎂單晶常需進(jìn)口，其價(jià)格昂貴，購(gòu)買手續(xù)繁瑣，且所能購(gòu)置的單晶尺寸一般為厘米級(jí)甚至更小，難以滿足批量化的力學(xué)和物理性能測(cè)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(zhǎng)方法，并探索了原料純度、結(jié)晶坩堝結(jié)構(gòu)及溫度設(shè)置等因素對(duì)晶體生長(zhǎng)的影響規(guī)律。應(yīng)用該方法及裝置，成功制備了純度為99��99%（質(zhì)量分?jǐn)?shù)）的分米級(jí)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.