The effect of Cu content on the high temperature oxidation properties of the phase change material(PCM)Al-Cu-Si alloys was studied.The oxidation kinetics curves at 600◦C were achieved for Al-Cu-Si alloys with 35-55%Cu...The effect of Cu content on the high temperature oxidation properties of the phase change material(PCM)Al-Cu-Si alloys was studied.The oxidation kinetics curves at 600◦C were achieved for Al-Cu-Si alloys with 35-55%Cu,which all follow the cubic law.With an increase in the Cu content from 35 to 55%,the weight gain decreases from 5.75 to 3×10^(−4) g/cm^(2) after 96 h isothermal oxidation.The oxidation rate also decreases with Cu content,the maximum and minimum rates are 1.52 and 0.32×10^(−5) g/cm^(2)•h,a nearly 4 times difference.Oxidation does not change the phase composition of Al-Cu-Si alloys,but coarsens the microstructure.The latent heat and the starting temperature of phase change after 96 h oxidation at 600◦C have variations of less than 10%and 6◦C,respectively,indicating that the Al-Cu-Si alloys have good thermal stability after high temperature oxidation.展开更多
基金The work is supported by the Chengdu Science and Technology Project(No:2019-YF05-01332-SN)the National Natural Science Foundation of China(No:51678488).
文摘The effect of Cu content on the high temperature oxidation properties of the phase change material(PCM)Al-Cu-Si alloys was studied.The oxidation kinetics curves at 600◦C were achieved for Al-Cu-Si alloys with 35-55%Cu,which all follow the cubic law.With an increase in the Cu content from 35 to 55%,the weight gain decreases from 5.75 to 3×10^(−4) g/cm^(2) after 96 h isothermal oxidation.The oxidation rate also decreases with Cu content,the maximum and minimum rates are 1.52 and 0.32×10^(−5) g/cm^(2)•h,a nearly 4 times difference.Oxidation does not change the phase composition of Al-Cu-Si alloys,but coarsens the microstructure.The latent heat and the starting temperature of phase change after 96 h oxidation at 600◦C have variations of less than 10%and 6◦C,respectively,indicating that the Al-Cu-Si alloys have good thermal stability after high temperature oxidation.
