International Journal of Electrical Machining
Online ISSN : 2188-5117
Print ISSN : 1341-7908
ISSN-L : 1341-7908
Paper
Study on Improvement of Wear Resistance for Zirconia by Large-area Electron Beam Irradiation
Togo ShinonagaMitsuhiro KimuraMotohiro InoueAkira Okada
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2019 Volume 24 Pages 27-32

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Abstract

Zirconia has been widely applied for cutting tools and biomaterials, since it has superior mechanical properties such as high fracture toughness, bending strength and biocompatibility in ceramics. In order to maintain its surface functions for long-term, further improvement of wear resistance for zirconia has been required. In this study, improvement of wear resistance for zirconia is proposed by large-area electron beam (EB) irradiation. Experimental results show that mean width in roughness curve of zirconia surface increases with increasing the energy density of EB, although the maximum height in surface roughness is almost same as the ground surface. In friction and wear test, coefficient of friction reduces with increasing the energy deinsity of EB since ball material smoothly slides on the EB irradiated zirconia surface. Furthermore, it is made clear that wear resistance of zirconia significantly improves by the EB irradiation under appropriate energy density.

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© 2019 by the Japan Society of Electrical Machining Engineers
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