Optimization of heat treatment condition of nonflammable Mg-Al-Ca alloys with high thermal conductivity

被引：10

作者：

Inoue, Shin-ichi ^{[1
]}

Ishiage, Kakeru ^{[2
]}

Kawamura, Yoshihito ^{[1
]}

机构：

[1] Kumamoto Univ, Magnesium Res Ctr, 2-39-1 Kurokami,Chuo Ku, Kumamoto 8608555, Japan

[2] Kumamoto Univ, Grad Sch Sci & Technol, Dept Mat Sci, 2-39-1 Kurokami,Chuo Ku, Kumamoto 8608555, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 934卷

关键词：

Magnesium alloy; Heat treatment; Thermal conductivity; SEM-EDS; XRD; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; MAGNESIUM ALLOYS; MICROSTRUCTURE; IGNITION; CALCIUM; DIFFUSIVITY; RESISTANCE; ADDITIONS; PERIOD;

D O I：

10.1016/j.jallcom.2022.168014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Our previous study found that the thermal conductivity of nonflammable Mg-Al-Ca alloys is improved by heat treatment. Heat-treated Mg-Al-Ca alloys exhibited a high thermal conductivity of 100-130 W m-1 K-1 because of C15 (Al2Ca) compound precipitation in the alpha-Mg phase. In this study, the optimal heat treatment condition and the effect of C15 precipitation behavior on thermal conductivity were investigated using Mg91.98Al5Ca3Mn0.02 alloys. The thermal conductivity saturated at approximately 120 W m-1 K-1 in the shortest time at a heat treatment temperature of 673 K. This suggests that the nucleation rate of the C15 compounds could reach the highest at 673 K. Through the formation of dense, long, and thick C15 com-pounds, thermal conductivity increased with decreasing Al concentration in the alpha-Mg matrix.(c) 2022 Elsevier B.V. All rights reserved.

引用

页数：8

共 44 条

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