title: A novel route for processing cobalt-chromium-molybdenum orthopaedic alloys.
abstract: Spark plasma sintering has been used for the first time to prepare the ASTM F75 cobalt-chromium-molybdenum (Co-Cr-Mo) orthopaedic alloy composition using nanopowders. In the preliminary work presented in this report, the effect of processing variables on the structural features of the alloy (phases present, grain size and microstructure) has been investigated. Specimens of greater than 99.5 per cent theoretical density were obtained. Carbide phases were not detected in the microstructure but oxides were present. However, harder materials with finer grains were produced, compared with the commonly used cast/wrought processing methods, probably because of the presence of oxides in the microstructure.
authors.affiliation: Department of Mechanical Engineering, University College London, London, UK.
authors.forename: Bhairav
authors.initials: B
authors.lastname: Patel
authors.forename: Fawad
authors.initials: F
authors.lastname: Inam
authors.forename: Mike
authors.initials: M
authors.lastname: Reece
authors.forename: Mohan
authors.initials: M
authors.lastname: Edirisinghe
authors.forename: William
authors.initials: W
authors.lastname: Bonfield
authors.forename: Jie
authors.initials: J
authors.lastname: Huang
authors.forename: Arash
authors.initials: A
authors.lastname: Angadji
mesh_terms: D007595:Joint Prosthesis; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D008669:Metallurgy / Q000379:methods; D009983:Orthopedic Equipment; D013499:Surface Properties; D014800:Vitallium / Q000737:chemistry*
chemical_list: D014800:Vitallium