Processing for preparing Al2O3/Cu composite by in situ reaction

作者：Liang Shuhua^*; Fan Zhikang; Xu Lei; Fang Liang

来源：Acta Materiae Compositae Sinica, 2003, 20(3): 93-97.

• Cold quenching
• High energy milling
• In situ reaction

A Cu-Al2O3 (1.5 wt% or so) composite was successfully prepared by using a new approach, which includes high energy milling of Cu and Al powders to produce Cu-Al alloy powder, high energy milling of the Cu-Al alloy powder together with Cu2O powder, and preparing Al2O3/Cu composite through conducting oxidation and sintering synchronously in vacuum. The peculiarities of this approach are that the reduction of superfluous Cu2O is left out, and the period of reacting and sintering is only 1 hour. It was observed that the Al2O3 particles uniformly dispersed in the copper matrix with an average size of 250 nm in diameter and particles space between 500 nm. The properties of Al2O3/Cu composite after cold working are close to those of SCM products. The Al2O3/Cu composite possesses excellent thermal stability since there are no cracks observed after exposing to 800°C and then cold quenching, which is cycled 20 times. The softening temperature of Al2O3/Cu composite is about 700°C.

• 出版日期2003