Thermal Storage Properties and Compatibility of Mg-43Ga and Mg-19Al-24Ga Alloys

Wen Hongyan; Fan Xiaoming; Lu Xiaobin; Yang Chengyong; Xu Lianyou; Ma Linxia; Luo Shixu

doi:10.15980/j.tzzz.2022.04.021

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Thermal Storage Properties and Compatibility of Mg-43Ga and Mg-19Al-24Ga Alloys
Vol. 42, Issue 4, Pages: 495-500(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.04.021

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Wen Hongyan, Fan Xiaoming, Lu Xiaobin, et al. Thermal Storage Properties and Compatibility of Mg-43Ga and Mg-19Al-24Ga Alloys. [J]. Special Casting & Nonferrous Alloys 42(4):495-500(2022)
DOI：

Wen Hongyan, Fan Xiaoming, Lu Xiaobin, et al. Thermal Storage Properties and Compatibility of Mg-43Ga and Mg-19Al-24Ga Alloys. [J]. Special Casting & Nonferrous Alloys 42(4):495-500(2022) DOI： 10.15980/j.tzzz.2022.04.021.

摘要

基于熔点低、热稳定性好的金属Ga

设计制备了Mg-43Ga和Mg-19Al-24Ga储热合金，采用排水法测定了合金的密度，利用X射线衍射仪、金相显微镜、电子探针显微分析仪和差示扫描量热仪等仪器，分别研究了其相组成、显微组织结构、相变温度和潜热值，并选择Mg-19Al-24Ga合金进行了与碳钢（Q235）、不锈钢（316）容器材料的相容性研究。结果表明，Mg-43Ga和Mg-19Al-24Ga合金的相变温度、相变潜热、储热密度分别为422.70℃、171.90 J/g、434.36 J/cm

和373.67℃、172.70 J/g、397.86 J/cm

二者均有成为良好相变储热材料的潜力。316不锈钢与Mg-19Al-24Ga合金的相容性明显优于Q235碳钢。

Abstract

Based on the metal Ga with low melting point and good thermal stability

Mg-43 Ga and Mg-19 Al-24 Ga heat storage alloys were designed and prepared. The density of the alloys was measured by drainage method. The phase composition

microstructure

phase transition temperature and latent heat of the alloys were investigated by means of X-ray diffraction

metallographic microscope

electron probe microanalyzer and differential scanning calorimetry

and the compatibility of Mg-19 Al-24 Ga alloy with carbon steel（Q235） and stainless steel（316） container materials was analyzed. The results show that the phase transition temperature

latent heat and heat storage density of Mg-43 Ga and Mg-19 Al-24 Ga alloys reach 422.70 ℃

171.90 J/g

434.36 J/cm~3

and 373.67 ℃

172.70 J/g

397.86 J/cm~3

respectively. Both of them have potential to be good phase change heat storage materials. The compatibility of 316 stainless steel with Mg-19 Al-24 Ga alloy is obviously better than that of Q235 carbon steel.