粉末冶金法によるアルミナ粒子強化Al基複合材料のin situ作製 In Situ Preparation of Alumina Particle Reinforced Aluminum Matrix Composites by Powder Matallurgy
Two kinds of CuO/Al composites and TiO<SUB>2</SUB>/Al composite were prepared by powder meturllagy involves hot pressing. Afterward, structures and hardness changes were investigated by means of Electron Probe Micro Analyzer, X-ray diffraction equipment and Vickers hardness tester.<BR>In the case of 3mass%CuO/Al composites, CuO was deoxidized by aluminum during heating at 823K, as a result, Cu dissolved into aluminum matrix and CuO particles are gradually replacing Al<SUB>2</SUB>O<SUB>3</SUB> particles on in-situ manner. Consequently Al<SUB>2</SUB>O<SUB>3</SUB>/Al composite was made and it revealed age hardning by isothermal heat treatment. On the other hand, 10mass%CuO/Al composite, intermetallic compound Al<SUB>2</SUB>Cu was formed in the matrix due to excessive amount of Cu atoms.<BR>In the case of TiO<SUB>2</SUB>/Al composite, since Ti atoms diffused toward aluminum matrix, detrimental Al<SUB>3</SUB>Ti were formed in the aluminum matrix and at the same time TiO<SUB>2</SUB> was transformed into Al<SUB>2</SUB>O<SUB>3</SUB>.
粉体および粉末冶金 44(2), 202-206, 1997-02-15
Japan Society of Powder and Powder Metallurgy