Release Time:2019-03-13  Hits:

Indexed by: Journal Papers

Date of Publication: 2019-02-15

Journal: MATERIALS LETTERS

Included Journals: Scopus、SCIE

Volume: 237

Page Number: 193-196

ISSN: 0167-577X

Key Words: Energy storage and conversion; Composite materials; Phase change material; Thermal cycling; Al-Si alloy

Abstract: A novel phase change material based on the clad Al-Si composite ingot with eutectic Al-Si/Si-rich core-shell structure was designed for the high temperature thermal storage. The constructed Al-Si composite with core-shell structure exhibits a high thermal conductivity, large phase change enthalpy, and excellent cycling performance. Due to the spheroidized primary Si particles and continuous alpha-Al matrix in the Si-rich layer, the Al-Si composite ingot holds a good shape-stable property at 650 degrees C, which prevents the leakage of eutectic Al-Si melt during thermal cycling. Therefore, this novel clad Al-Si composite is a promising material for high temperature thermal storage, which may be directly used as an actual thermal storage device without containers. (C) 2018 Elsevier B.V. All rights reserved.