Papers by Keyword: Powder Metallurgy Technique

Abstract: A Co-Cr-Mo (ASTM CoF-75) alloy is normally used because of their good in physical, mechanical, wear and as well as biocompatibility. In order to obtain similarity chemical structure of bone, addition of HAP or TCP into CoF-75 alloy is required. The samples were fabricated using powder metallurgy (P/M) technique under pressure of 350 MPa and sintered at 1200 °C under argon atmosphere. The results on the effect of different additives were studied in terms of shrinkage, bulk density, apparent porosity and microstructural analysis.

Abstract: The microstructure and mechanical properties of ZrO2/Ni functionally graded materials (FGMs) fabricated by powder metallurgy technique were investigated experimentally. The relative density of non-graded composite and functionally graded materials (FGM) was also measured. Microscopic examination exhibits that the material composition and microstructure of the FGMs vary gradually. The distributions of mechanical properties in the FGMs are obtained from the mechanical testing of homogeneous composite samples with different volume fractions of Ni. The results show that the elastic modulus and the bending strength decreases with increasing the nickel content from 0 to 50 % Ni, this is mainly affected by the weakly bonded ceramic/metal interface. Also, it was found that the fracture toughness and the elastic modulus in the FGMs are higher than that of the all non-graded composite.

Abstract: We studied the effects of the processing variables on the texture development of Ni tapes prepared from Ni powder compact rods. The Ni power was compacted into rods by cold isostatic pressing(CIP). The CIP-processed Ni rods were sintered for densification and made into Ni tapes of 100 microns by cold rolling. For the development of a cube texture, the rolled Ni tapes were annealed at various temperatures. The brass texture was converted into a cube texture during annealing and the degree of the formed cube textured was dependent on the annealing temperature. We analyzed the (200) cube texture by X-ray diffraction and pole figure analysis and EBSD(Electron beam backscattered diffraction pattern).