Friction and Wear Behavior of CaO-MgO-Al₂O₃-SiO₂ Glass-Ceramics Prepared by Waste Casting Sands

Abstract:

CaO-MgO-Al₂O₃-SiO₂ glass-ceramics were produced by using waste casting sands as a main raw material. Friction and wear tests for the glass-ceramics were conducted with M-200 wear tester against GCr15 steel wheel. The worn morphologies, wear mechanisms and compositions of the glass-ceramics were observed and analyzed with scanning electron microscope (SEM) and energy diffraction spectrum (EDS). The results show that under the dry friction sliding the glass-ceramics present high wear rate and friction coefficient, with wear mechanisms are dominantly brittle spalling and some with adhesive wear. By an addition of 10% pure aluminum, the density of the glass-ceramics and wear resistance can be improved with their friction coefficient being lowered. Under oil lubrication sliding, the friction coefficient of glass-ceramics decreases and their wear resistance increases extremely, whose reason is that small pores within the glass-ceramics play an role on oil storage.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 1251-1256
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.1251
• Online since: November 2012
• Authors: Lei Fan, Hua Hui Chen, Wan Ting Mao, Jing Jing Cao
• Keywords: Friction Performance, Glass Ceramics, Oil Lubrication, Waste Casting Sands, Wear Mechanism

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