Using Powder Metallurgy Process to Produce Ceramic-Metal Composites

Abstract

Pressing powders and engineering materials is an innovative method for producing samples with a low cost and multiple industrial applications. In the current article, copper metal was added in different volume ratios to a ceramic material, alumina, for the purpose of improving the properties of alumina, by pressing with a hydraulic press. Where the results of the article showed that the percentage of true porosity after sintering is from (26 e 13)% with a copper content of (5%) to (25%). As for the apparent porosity after sintering, it decreased from (26 e 9)% at a copper content of (5 e 25)%, while the water absorption was directly proportional to the real and apparent porosity. As for the results, the Vickers hardness increased after sintering from(54 e 101)Kg/mm 2 at a copper content of (5 e 25)%. As for after heat treatment, there was a gradual increase in the resistance from (73 e 118)N/mm 2 at a copper content of (5 e 25)%. As for the synthetic results of SEM, the best consistency was at (25%) copper, and the X-ray diffraction results showed the emergence of new phases that signi fi cantly strengthen the composites and improve the mechanical and structural properties And a clear improvement during the crystalline structure, and thus we fi nd that the appearance of the phase (CuAlO 2 ) is characterized by high durability and strength that hinders crystalline dislocations.