【摘要】 以Zr、Ti、Cu和C元素粉末为原料 ,用XRD、EPMA、SEM、力学性能检测等方法 ,研究机械合金化合成的ZrC C和 (ZrC +TiC) Cu复合材料的力学和电学性能。实验结果表明 :可以用机械合金化合成TiC、ZrC粉末。力学性能方面 ,经ZrC弥散的Cu基复合材料抗拉强度为 35 9 4 5MPa ,布氏硬度为 1 4 6 2 ,经 (ZrC +TiC)弥散的复合材料抗拉强度为 377 3MPa ,布氏硬度为 1 6 6 5 ,说明ZrC作为第二相可以明显改善Cu基材料的力学性能 ,而且(ZrC +TiC)两相强化效果更好。由断口形貌分析 ,复合材料主要发生沿界面脆性断裂。电学性能方面 ,由于致密度不够高以及其他杂质相的引入 ,材料的相对电导率 (IACS标准 )有待提高。更多还原

【Abstract】 With Zr、Ti、Cu and C powders as raw materials,the mechanical and electrical properties of ZrC/Cu and(ZrC+TiC)/Cu composites synthesized by mechanical alloying(MA) are investigated by means of XRD、EPMA、SEM、tensile testing and hardness measurements. The results show that ZrC and TiC can be synthesized by MA. As for mechanical properties,the tensile strength of the composite reinforced by ZrC is up to 359 45MPa and Brinell hardness 146 2,while reinforced by(ZrC+TiC)up to 377^3MPa and 166 5,respectively.It is concluded that ZrC can improve mechanical property of Cu-based composite evidently,furthermore,the coexitence of ZrC and TiC can improve the property more. From the fractographs,it is concluded that the fracture mechanism of specimens is brittle fracture.As for the electrical property,due to the low bulk density and other introduced phases,the relative conductance is not high enough.更多还原