Molla, Atiar Rahaman and Kumar, B. V. Manoj and Basu, Bikramjit (2009) Friction and wear mechanisms of K(2)O-B(2)O(3)-Al(2)O(3)-SiO(2)-MgO-F glass-ceramics. Journal of the European Ceramic Society, 29 (12). pp. 2481-2489. ISSN 0955-2219

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Among various brittle materials, the mica-based glass-ceramics are of greater scientific interest, because of their machinability. Considering the potential of these materials as dental implants, an understanding of the wear behavior in oral environment is important. In the present investigation, K(2)O-B(2)O(3)-Al(2)O(3)-SiO(2)-MgO-F glass-ceramics containing about 70% crystals, heat treated at 1040 degrees C for 12h was subjected to fretting against steel ball in artificial saliva (AS) environment. In order to elucidate the influence of environment on the friction and wear behavior, control experiments were also performed under dry ambient conditions. A systematic decrease in wear rate with test duration was recorded with a minimum wear rate of 10(-5) mm(3)/Nm after 100,000 fretting cycles in AS medium. Scanning electron microscope-energy dispersive spectroscopy (SEM-EDS) analysis indicated the formation and brittle fracture of tribochemical layer in AS medium, whereas mica crystal pull-out was a dominant mechanism in dry conditions. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Glass-ceramics; Wear; Artificial saliva
Subjects: Glass
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 29 Feb 2012 11:16
Last Modified: 29 Feb 2012 11:16

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