反应合成制备纳米Al2O3-弥散强化铜合金特性研究

Characteristics of nano-alumina particles dispersion strengthened copper fabricated by reaction synthesis

摘要:

采用反应合成工艺制备了纳米Al2O3-弥散强化铜合金，研究结果表明：铜基体内部均匀、弥散分布着直径大小约为10 nm的纳米γ-Al2O3颗粒，纳米颗粒与基体间界面清洁，且存在如下的晶体学位向关系：(002)Cu // γ-Al2O3,[110]Cu// [011]γ-Al2O3。该工艺制备的合金性能优异，室温抗拉强度和屈服强度可达570 MPa和475 MPa，抗软化温度高于900 ℃，同时合金的导电率和洛氏硬度值分别为85% IACS和86 HRB。

Abstract:

Alumina dispersion strengthened copper (ADSC) composite was prepared by reaction synthesis (RS) process. Studies show that nano-sized γ-Al2O3 particles of about 10 nm in diameter are homogeneously distributed in copper matrix. A coherent interface relationship with (002)Cu // γ-Al2O3,[110]Cu// [011]γ-Al2O3 characterizes along the explored interfaces of the composites. The composites obtain high tensile properties. Namely the tensile strength can reach to 570 MPa and the yield strength can reach to 475MPa at room temperature. Meanwhile, the softening temperature is higher than 1173 K. The electrical conductivity of sample is 85% IACS and the Rockwell hardness can reach to 86 HRB.