کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477306 991179 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Friction and wear mechanisms of K2O-B2O3-Al2O3-SiO2-MgO-F glass-ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Friction and wear mechanisms of K2O-B2O3-Al2O3-SiO2-MgO-F glass-ceramics
چکیده انگلیسی
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, K2O-B2O3-Al2O3-SiO2-MgO-F glass-ceramics containing about 70% crystals, heat treated at 1040 °C for 12 h 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 mm3/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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 29, Issue 12, September 2009, Pages 2481-2489
نویسندگان
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