کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1462322 | 989629 | 2014 | 12 صفحه PDF | دانلود رایگان |
This study examined the wear and friction behavior of pulse electric current sintered Al2O3–ZrO2 composites containing such fluorides as CaF2 and BaF2. The dry sliding wear and friction properties against a commercial alumina bearing ball were investigated using a reciprocal ball-on-plate tribometer. The coefficient of friction of the fluoride-containing Al2O3–ZrO2 composites decreased by approximately 10–20% compared with that of the matrix composite. The wear rate of the fluoride-containing Al2O3–ZrO2 composites was determined to be lower than that of the matrix composite. The following wear rates were observed herein: 0.53×10−6 mm3/m N (CaF2 and low weight fraction of BaF2), 11.41–45.05×10−6 mm3/m N (high weight fraction of BaF2), and 168.17×10−6 mm3/m N (matrix composite). Furthermore, different friction coefficients were observed for the reciprocal sliding test compared with the scratch test due to a difference in the fracture behavior. Because the scratch test employed unidirectional motion, it did not involve fracture behavior due to fatigue or repeated contact.
Journal: Ceramics International - Volume 40, Issue 1, Part A, January 2014, Pages 779–790