中南大学学报（自然科学版）2016，Vol.47Issue(5)：1500-1505,6.DOI:10.11817/j.issn.1672-7207.2016.05.007
过共晶铝硅合金的组织和热膨胀行为
Microstructure and thermal expansion behavior of hypereutectic Al-Si alloy
摘要
Abstract
The hypereutectic AlSi27 alloywas prepared by spray-formed process. The microstructure and thermal expansion behavior between room temperatureand500℃of hypereutectic AlSi27 alloywere investigated. The results show that the primary Si phases are uniform distribution in the spray-formed AlSi27 alloy, and the primary Si phase grows form fine spherical particle to bulky spherical particle or strip-likephase withtheincrease ofaging temperature. Thecoefficient of thermal expansion (CTE) between room temperatureand100℃of the AlSi27 alloy increases gradually withtheincrease ofaging temperature. On the other hand, the CTE at different cycling temperature is almost linearly increased withtheincreaseoftemperature, and agreed well with the Kerner model.关键词
喷射沉积/过共晶铝硅合金/残余热应力/热膨胀系数Key words
spray-formed/hypereutectic Al-Si alloy/thermal residual stress/coefficient of thermal expansion分类
矿业与冶金引用本文复制引用
朱学卫,王日初,彭超群,彭健..过共晶铝硅合金的组织和热膨胀行为[J].中南大学学报（自然科学版）,2016,47(5):1500-1505,6.基金项目
国家军品配套项目(JPPT-125-GH-039)(Project(JPPT-125-GH-039)@@@@ supported by the NationalProject ofMilitaryIndustry) （JPPT-125-GH-039）
