Innovative Metal Injection Molding (MIM) Method for Producing CoCrMo Alloy Metallic Prosthesis for Orthopedic Applications

Abstract

Powder injection molding (PIM) is a powder metallurgy process currently used for the production of complicated and near net shape parts of high performance materials [. This technique basically combines the advantages of plastic injection molding and the versatility of the conventional powder metallurgy technique. The process overcomes the shape limitation of powder compaction, the cost of machining, the productivity limits of isostatic pressing and slip casting, and the defect and tolerance limitations of conventional casting [1, 2, . According to German and Bose [, the technology of metal injection molding (MIM) is more complicated than that of the plastic injection molding, which arises from the need to remove the binder and to densify and strengthen the part. The process composed of four sequential steps: mixing of the powder and organic binder, injection molding, debinding where all binders are removed and sintering [1, 2, 3, 4]. If it necessary, secondary operations such as heat treatments after sintering can be performed [1, 2, 3, 4, .

SS 316L/HA composite via powder injection moulding: Mechanical and physical properties

“…The dimensional shrinkage of the green and sintered compacts was measured from its dimensional changes. The linear shrinkage of many MIM compacts are varied between 10% to 20 % [18]. The shrinkage recorded in this work was in the range of 6.7% to 13.3 %.…”

“…Besides, the tensile strength of sintered compacts was affected by density. The higher value of density on sintered compact gave a stronger interparticle bonding as it avoided crack propagation and provided higher tensile strength [18]. Additive of HA wt.…”

Recent Advances in Processing of Titanium and Titanium Alloys through Metal Injection Molding for Biomedical Applications: 2013–2022

“…Biocompatible metals have so far been most widely used in biomedical applications. Titanium (Ti) and Ti alloys, stainless steel, and cobalt (Co) alloys are the broadly recognized biocompatible metals in the medical industry [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. These materials are commonly used to replace and support fractured bone fragments as well as in dental implants, pacemaker casings, artificial heart valves, screws, plates, artificial joints, extrinsic fixators, spinal fixations, and stents [2,[34][35][36].…”