Original paper(Vol.49 No.3 pp.334)

Effect of Cu content fraction and temperature on mechanical properties of Al₂O₃/Cu composite materials

Arai Masayuki; Iwata Uichi

Abstract:In this study, effect of temperature and Cu contents on Al₂O₃/Cu composite materials was examined experimentally. Obtained results are summarized as follow.
(1) Microstructure of Al₂O₃/Cu composite material is changed between 50 left bracket % right bracket and 75 left bracket % right bracket Cu content. That is, a matrix in Al₂O₃/Cu composite materials with 25 left [%] and 50 [%] Cu content is Al₂O₃. On the other hand, a matrix in 75 left bracket % right bracket Cu content is Cu. (2) Density of the composite materials increases monotonously with Cu content. Vicker's hardness decreases with Cu content. (3) Coefficient of linear thermal expansion increases with Cu content. (4) Young's modulus decreases with Cu content. (5) Bending strength has strong effect of both of temperature and Cu content.

Key Words:Al2O3/Cu composite material, Density, Viker's hardness, Coefficient of linear thermal expansion, Young's modulus, 4-point bending and microstructure