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Summary
Ion implantation modifies the surface composition and properties of materials by bombardment with high energy ions. The low temperature of the technique ensures the avoidance of distortion or surface degradation of components.
Wear resistance, evaluated by a lubricated Falex test, can be improved by up to four times and the surface hardness of hard chromium and cobalt/tungsten alloys can be increased by up to 40%, when an optimum dose of nitrogen is implanted. These effects are explained in terms of the formation of nitrides, which improve the load bearing capacity of the surface and its abrasion resistance.
Additional information
Notes on contributors
J. I. Oñate
Mr Oñate received his first degree in Industrial Engineering at Bilbao University (Spain) in 1981. After an industrial training period at SKF-Spain, he came to Aston University sponsored by the Basque Government to study for an MSc in Metals, Materials and Management, which was awarded in 1984. At present he is carrying out research leading to a PhD degree in the Mechanical and Production Engineering Department at Aston University on the effects of nitrogen implantation on a range of engineering materials.
J. K. Dennis
Dr J. K. Dennis is a senior lecturer in the Department of Mechanical and Production Engineering at Aston University. He has published many papers on metal finishing topics. He is a member of the IMF Council, Publications Committee and Industrial and Technical Committee.
S. Hamilton
Miss S. Hamilton is the Managing Director of Tech-Ni-Plant Ltd.