Surface Covering Effects of Mg Alloys with Al2O3 Particle Dispersed Mg Powders Using MM/SPS Method

Longyi WEN 　Shigehiro KAWAMORI

WORLD　PM2024

Japan Powder Metallurgy Association(JPMA) Japan Society of Powder and Powder Metallurgy (JSPM)

YOKOHAMA, JAPAN

To modify the surface of practical Mg alloy M1A, M1A laminated compacts were produced by laminating Al2O3 particle-dispersed Mg MM powder, which has higher hardness than practical Mg alloy, on both surfaces of M1A discs and then SPS treatment. The results of micro-Vickers hardness tests and wear tests of the M1A laminated compacts showed that the surface coating layer showed higher hardness, lubricity and wear resistance than the M1A surface, and lateral observations of the M1A-laminated compacts broken by a three-point bending test showed high adhesion between the coating layer and M1A. Elemental analysis by SEM-EDS and X-ray diffraction results showed the formation of Mn-Al intermetallic compounds at the coating layer/M1A interface.