Author(s)

M. E. Murphy, M. T. Laugier, B. D. Beake & S.B. Newcomb

Abstract

Surface microstructural modification of biomedical grade alpha-alumina by ion implantation M. E. Murphy \ M. T. Laugier*, B. D. Beake^ & S. B. Newcomb^ * Department of Physics, University of Limerick, Ireland. ^MicroMaterials, Wrexham, UK. * Materials and Surface Science Institute, University of Limerick, Ireland. Abstract Biomedical grade (>99.5% purity) polycrystalline alpha-alumina has been implanted with C ions (75 keV) at fluences ranging from 5x10^ to 5x10^ C ions/cm^ and Zr ions (100 keV) at fluences ranging from 5x10^ to 5x10^ Zr ^ ions/cm . The surfaces of the alumina have been examined in cross-section using transmission electron microscopy (TEM) and the data obtained correlated with both nanohardness measurements and computer based simulations (Transport and Range of Ions in Matter, TRIM). The nanohardness of the near-surface alumina was determined as a function of depth and was found to be strongly dependent on the fluence used. The data is discus

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