Design of Mg-Zn-Si-Ca casting magnesium alloy with high thermal conductivity

被引：37

作者：

Bazhenov, V. E. ^{[1
]}

Koltygin, A., V ^{[1
]}

Sung, M. C. ^{[2
]}

Park, S. H. ^{[2
]}

Titov, A. Yu ^{[1
]}

Bautin, V. A. ^{[1
]}

Matveev, S., V ^{[1
]}

Belov, M., V ^{[1
]}

Belov, V. D. ^{[1
]}

Malyutin, K., V ^{[2
]}

机构：

[1] Natl Univ Sci & Technol MISiS, Leninskiy Pr 4, Moscow 119049, Russia

[2] LG Elect Inc, 128 LG Twin Tower, Seoul 07336, South Korea

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2020年 / 8卷 / 01期

关键词：

Magnesium alloy; Thermal conductivity; Phase composition; Corrosion rate; Sand casting; High-pressure die casting; MG2SI MORPHOLOGY; PHASE; MICROSTRUCTURE; MECHANISMS; BEHAVIOR; KBF4;

D O I：

10.1016/j.jma.2019.11.008

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Magnesium alloys are commonly used to produce lightweight parts. While most magnesium alloys exhibit low thermal conductivities, high thermal conductivities are needed for electronic devices. In this study, we attempted to develop new magnesium casting alloys with high thermal conductivities. The Mg-Zn-Si-Ca alloy compositions were chosen using CALPHAD (CALculation of PHAse Diagrams) calculations, and alloy samples were prepared. The fluidity and hot-tearing resistance were measured. The results indicated that these properties were similar to those of AZ91 alloy. Tensile tests showed that high-pressure die casting could produce Mg-Zn-Si-Ca alloys possessing mechanical properties 1.5-3 times higher than those produced via sand casting. The alloy thermal conductivity was 126 W/mK at room temperature. The corrosion rates of the as-cast samples in NaCl/water solutions were two times higher than that of AZ91. (c) 2020 Published by Elsevier B.V. on behalf of Chongqing University.

引用

页码：184 / 191

页数：8

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