Al-Si-Mg-Cu Heat Storage Alloys and Their Heat Storage Properties

摘要：

　　The problems such as poor oxidation resistant properties at high temperatures and abated thermal storage capacities after repeated thermal cycles still exist in heat storage alloys.In order to alleviate these problems,orthogonal experiment was used to design nine Al-Si-Mg-Cu alloys in this work.An SII TG/DTA6300 differential thermal analyzer was used to determine the heat storage properties of these alloys.After integrating a series of factors,Al-12Si-2Mg-15Cu alloy was selected as the heat storage alloy.The oxidation test of this alloy at the temperature of 650 ℃ for 300 h was carried out,and the oxidation kinetics curve was obtained.The results showed that the oxide film was of good protection.This alloy exhibited a good thermal stability in view of the latent heat of fusion decreased 3.53%,the initial phase transition temperature decreased 0.1 ℃,and terminated phase transition temperature increased 3.1 ℃ after 150 times of thermal cycles.The photomicrograph was used to discuss the reasons of the performance changes of this alloy.

关键词： Heat storage alloy Latent heat of fusion Phase change temperature High temperature oxidation resistance Thermal stability

作者: Sirong Yua Jun Xu Xiaohua Zhang Qiang Yao Shumiao Xue

作者单位: College of Mechanical and Electronic Engineering, China University of Petroleum,Qingda0 266580, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 24-28

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）