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Due to good wear resistance Ultrahigh Molecular Weight Polyethylene (UHMWPE) is the material of choice for the load bearing surfaces of total joint implants. In order to improve its performance polymer parts are often modified by the use of ionizing radiation. Here we report on the use of electron and ion beams and γ-rays for the purpose. UHMWPE samples were irradiated with 600keV and 1.5MeV electron...
The electrodeposited two-phase γ-Ni+γ′-Ni 3 Al and single-phase γ′-Ni 3 Al coatings with and without CeO 2 particles were developed by the conversion of electrodeposited Ni–Al or Ni–Al–CeO 2 films with dispersed Al microparticles in Ni matrix into γ′-Ni 3 Al by vacuum annealing at 800°C for 3h. SEM/EDAX and TEM characterizations showed that the CeO 2 ...
The optical properties of vapour chopped and nonchopped undoped tin oxide thin films (1000Å) have been studied. The films were prepared by thermal oxidation (in air) of vacuum evaporated vapour chopped and nonchopped tin thin films. Effect of varied oxidation temperature and duration was also studied. As revealed by X ray diffraction studies, polycrystalline (both tetragonal and orthorhombic) films...
The production of intermetallic compound was carried out in an electrical resistance furnace in open air under 150MPa uniaxial pressure at 1050°C for 1hour using aluminum powder with 15μm size and Carbonyl-nickel powder with 4–7μm size having 99% and 99.8% purity, respectively. The formation temperature of intermetallic compound was determined by Differential Scanning Calorimeter analysis, and exothermic...
The interaction between a water cluster ion beam and the surface of a silicon substrate was investigated. The sputtering yield of silicon by a water cluster ion beam was approximately ten times larger than that by an argon monomer ion beam. X-ray photoelectron spectroscopy was used to analyze the silicon surface irradiated with a water cluster ion beam. The analysis revealed that the surface was oxidized,...
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