(华南理工大学 广东省金属新材料制备与成形重点实验室，广州 510640)
摘 要: 采用AlSiTiCrNiCu高熵合金颗粒(HEAp)作为增强相增强铝合金，研究高熵合金颗粒体积分数和烧结温度对HEAp/6061Al复合材料热膨胀系数(CTE)的影响。结果表明：25~100 ℃时，6061Al合金和AlSiTiCrNiCu高熵合金(HEA)的热膨胀系数分别为23.04×10-6/℃和9.85×10-6/℃；随着高熵合金颗粒体积分数的增高，HEAp/6061Al复合材料的热膨胀系数明显降低。当保持高熵合金颗粒体积分数不变时，随着温度的升高，HEAp/6061Al复合材料的热膨胀系数呈现出先增大后保持不变的规律。
关键字: 高熵合金；铝基复合材料；热膨胀系数；体积分数；烧结温度
（1. Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China）
Abstract:AlSiTiCrNiCu high-entropy alloy particles(HEAp) were used as the reinforced phase to reinforce aluminum alloy in order to study the effects of HEAp volume fraction and sintering temperature on the coefficient of thermal expansion(CTE) of the composites. The results show that the CTEs of 6061Al alloy and HEAp are 23.04×10-6/℃ and 9.85×10-6/℃, respectively, at 25-100 ℃. With the increase of HEAp volume fraction, the coefficient of thermal expansion of HEAp/6061Al composites reduces obviously. When the volume fraction of enhanced phase is certain, the CTE of HEAp/6061Al composites increases at first and then keeps on with the increase of sintering temperature.
Key words: high entropy alloy; aluminum matrix composite; coefficient of thermal expansion; volume fraction; sintering temperature
