期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 203, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.solmat.2019.110165
关键词
Phase change materials; Al-Si alloys; Ceramic materials; Cycling stability; Corrosive property
资金
- National Key Basic Research Program of China [2013CB228303]
- National Natural Science Foundation of China [51906150]
Cycling stability and corrosive property of Al-Si alloys with different silicon mass ratios are experimentally investigated for high-temperature latent heat storage purpose, respectively. Melting temperatures, latent heat, thermal diffusivities of Al-Si alloys after 0, 50 and 100 melting-solidification cycles are measured and their thermal conductivities are calculated. Microstructures of Al-Si alloys after 0, 50 and 100 melting-solidification cycles are observed and the relations between thermophysical parameters and microstructures are discussed. Six kinds of common engineering ceramics are adopted to examine the corrosive property of molten Al-Si alloys. The microstructures and element distributions at the interfaces are detected. It is concluded that the microstructures of Al-Si alloys all changes after cycles; the melting temperatures of Al-Si alloys remain relatively stable after cycles, but the variation of latent heat is only found small for AlSi12 alloy and AlSi20 alloy; due to the microstructure variation, the heat transfer performance of Al-Si alloys changes significantly after cycles except AlSi12 alloy; Al2O3 ceramics and AIN ceramics show excellent corrosion resistance in molten Al-Si alloys; the corrosion resistance of SiC ceramics increases with the silicon mass ratio of Al-Si alloys; corrosion exists between Si3N4/BN/ZrO2 and Al-Si alloys, which however remains to be studied further.
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