摘要
对Mg-10Gd-3Y-0.5Zr(GW103)和Mg-12Gd-3Y-0.5Zr(GW123)两种高强耐热镁合金不同温度下的比热容、热导率、热扩散系数和线膨胀系数进行了测定。测试结果显示,在相同温度下GW103合金比GW123合金的比热容大;在200℃以下时GW103合金比GW123合金的热导率大,在200℃以上时GW123合金比GW103合金的热导率大;在温度增加的过程中GW103合金始终比GW123合金的热扩散系数大;在相同的温度下GW103合金比GW123合金的线膨胀系数小。分析表明,合金成分和相的高温转变对两种合金的热物理性能有很大的影响。
The specific heat capacity, thermal conductivity, thermal diffusivity and linear expansion coefficient of Mg-10Gd-3Y-0.5Zr (GW103) and Mg-12Gd-3Y-0.5Zr (GW123) alloys were measured at different temperatures. The results reveal that at a given temperature, the specific heat capacity of GW103 alloy is higher than that of GW123. With the temperature below 200℃, the thermal conductivity of the GW103 alloy is more than that of the GW123 alloy, while with the temperature more than 200℃, that of GW123 alloy is higher. With increasing in temperature, the thermal diffusivity of the GW103 alloy is always higher than that of GW123 alloy. In addition, at a given temperature, the linear expansion coefficient is lower than that of GW123 alloy. The chemical composition and high temperature transformation of phase in the alloys are closely related to the thermal-physical properties of the alloys.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第10期950-952,共3页
Special Casting & Nonferrous Alloys
基金
国家安全重大基础研究资助项目(6113301E)
关键词
MG-GD-Y-ZR
比热容
热导率
热扩散系数
线膨胀系数
镁合金
Mg-Gd-Y-Zr Alloy, Specific Heat Capacity, Thermal Conductivity, Thermal Diffusivity, Linear Expansion Coefficient, Magnesium Alloy
