Study on the Microstructure and Storage Heat Performance of Mg-25Al-15Zn-xCu Alloys

Hong Yan Wen; Xiao Ming Fan; Xiao Min Cheng

doi:10.4028/www.scientific.net/AMR.1120-1121.1104

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1120-1121Study on the Microstructure and Storage Heat...

Study on the Microstructure and Storage Heat Performance of Mg-25Al-15Zn-xCu Alloys

Abstract:

With the help of optical microstructure(OM), X-ray diffraction(XRD) and differential scanning calorimetry(DSC), the microstructure and storage heat performance of Mg-based phase change thermal storage alloys were investigated.The results show that the microstructure of Mg-25Al-15Zn-xCu (x=0, 2%, 8% and 14%, respectivly) alloys are mainly composed of primary crystal α (Mg) solid solution matrix, β-Mg₁₇Al₁₂, CuZn, MgAl₂Cu and Mg₃₂(Al,Zn)₄₉ phases. The phase transition temperature of Mg-25Al-15Zn and Mg-25Al-15Zn-8Cu alloys are 412.1 °C and 405.9 °C respectively; and phase change latent heat values of that were 175.4 J/g and 209.3 J/g. The addition of Cu led to the formation of new phase, reducing the phase transition temperature and increasing the value of phase change latent heat.

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Periodical:

Advanced Materials Research (Volumes 1120-1121)

Pages:

1104-1108

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.1104

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Online since:

July 2015

Authors:

Hong Yan Wen, Xiao Ming Fan*, Xiao Min Cheng

Keywords:

Mg-Based Alloy, Microstructure, Phase Change Heat Storage Material, Thermal Storage Property

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