摘要
采用粉末冶金的方法,以Al2O3,SiO2,SiC和MgO等纳米颗粒为增强相,制备出4种不同颗粒的纳米复合材料,研究了各增强相对复合材料显微组织与性能的影响.结果表明:在相同的质量分数(w)和制备工艺下,不同弥散相颗粒的弥散强化铜合金显微组织不同,铜基体上大体均匀地分布着细小的弥散相颗粒,但部分区域仍存在偏聚现象.4种复合材料的电导率相近,抗拉强度方面Cu/Al2O3与Cu/SiO2的性能要略好于Cu/SiC与Cu/MgO.
Reinforced between different particle types with Al2O3, SiO2, SiC and MgO nanoparticles, four nanocomposites were prepared by powder metallurgy method. Effects of strengthening phases on the microstructure and properties of the composites were investigated. The result shows that preparing in the same way and with the same mass fraction,microstructures of dispersion strengthened copper alloys with different dispersion particles are different, minute dispersion particulates are revealed uniform distribution on the surface of copper matrix, and phase segregation is investigated in partial regions. Electrical conductivities of four composites are similar and tensile strength properties of Cu/Al2O3 and Cu/SiO2 are better than Cu/SiC and Cu/MgO.
出处
《上海工程技术大学学报》
CAS
2012年第3期259-262,共4页
Journal of Shanghai University of Engineering Science
基金
国家自然科学基金资助项目(51075122U1034002)
河南省科技创新杰出青年基金资助项目(094100510005)
洛阳市科技攻关资助项目(0903041A)
上海工程技术大学研究生科研创新资助项目(A-2503-12-01K169)
关键词
弥散强化
微观组织
抗拉强度
电导率
dispersion strengthening
microstructure
tensile strength
electrical conductivity
