有色金属科学与工程2026，Vol.17Issue(4)：534-544,11.DOI:10.13264/j.cnki.ysjskx.2026.04.006
Cu、Mg含量对Al-20Si合金组织与热学性能的影响
Effect of Cu and Mg contents on the microstructure and thermal properties of Al-20Si alloy
摘要
Abstract
In order to get aluminum-silicon alloys with low thermal expansion and high thermal conductivity,the effects of different Cu and Mg contents added to an Al-20Si alloy were investigated.The results showed that in the Al-20Si alloy,as the Cu content increased,the coefficient of thermal expansion,thermal conductivity,and electrical conductivity of the alloy all exhibited a decreasing trend,while the microhardness gradually increased.In the Al-20Si-2Cu alloy,as the Mg content increased,the coefficient of thermal expansion and the hardness showed an increasing trend,while the thermal and electrical conductivities decreased.When the Cu content was 2%and the Mg content was 0.3%in the Al-20Si alloy,a low-expansion,high-thermal-conductivity aluminum-silicon alloy with an expansion rate of 18.81×10-6 K-1 and a thermal conductivity of 132.55 W/(m·K)was successfully prepared.关键词
铝硅合金/微观组织/导热性能/热膨胀性能Key words
aluminum-silicon alloys/microstructure/thermal conductivity/thermal expansion properties分类
矿业与冶金引用本文复制引用
杨湘杰,廖凯,李锟,谢世坤,吁安山..Cu、Mg含量对Al-20Si合金组织与热学性能的影响[J].有色金属科学与工程,2026,17(4):534-544,11.基金项目
国家自然科学基金资助项目(50474007) （50474007）
江西省教育厅科学技术研究项目(GJJ2201606) （GJJ2201606）
