摘要
用粉末冶金法制备了Cu/AlN和Cu/Al2O3两种复合材料,研究了两种纳米颗粒含量对复合材料性能的影响和复合材料的软化温度,并探讨了相关机理,比较了AlN和Al2O3纳米颗粒的增强效果。结果表明,在烧结过程中,弥散分布在铜基体中的AlN和Al2O3纳米颗粒细化了晶粒;随着复合材料中AlN和Al2O3质量分数的增加,材料的密度和导电性都呈下降趋势,而硬度出现极大值;两种复合材料的软化温度均达到700℃,远远高于纯铜的软化温度(150℃),从而提高了材料的热稳定性;综合各种因素考虑,AlN纳米颗粒对铜基体的增强效果要优于Al2O3纳米颗粒。
Both Cu/AlN and Cu/Al2O3 composites were fabricated by the powder metallurgy method. The influence of the content of two kinds of particle on the properties of composites and the softening temperature of composites are studied and relevant mechanism is discussed and reinforcement effects of AlN and Al2O3 are compared. The results show that AlN and A12O3 dispersed in copper matrix can refine the grain size. With an increase in AlN and Al2O3 addition, both the density and conductivity of the composites drop, whereas the value of hardness comes to the peak. The softening temperature of the two kinds of composite is at about 700℃ which is far higher than that of pure copper, leading to improvement of the temperature stability.Considering all factors, the reinforcement effect of AlN is better than that of Al2O3.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第9期1031-1034,1125,共5页
Journal of Hefei University of Technology：Natural Science
基金
安徽省"十五"二期科技攻关资助项目(040020392)
合肥市重点科技攻关资助项目(20051044)
关键词
粉末冶金
复合材料
纳米颗粒
导电性
硬度
软化温度
powder metallurgy
composite
nano-particle
conductivity
hardriess
softening temperature
