Preparation of Glass-Ceramics of Li₂O-Al₂O₃-ZnO-SiO₂ System Coating Toughed by ZrO₂ Basic on Metal Substrate

Abstract:

Glass-ceramics of Li2O-Al2O3-ZnO-SiO2 system coating on Q235 steel surface is prepared by sintering process, and improved hardness and fracture toughness of the coating through add appropriate ZrO2 in glass-ceramics. Post-mortem crystal process, sintering technology and microstructure of the coating were investigated by differential scanning calorimetry (DSC), X-Ray powder diffraction(XRD) and scanning electron microscope(SEM). Maximum bending force and fracture deflection were measured by three point bending method. Results showed that main crystal phase of the coating were Li2Al2Si3O10 and Li8Zn10Si7O28. Crystallization temperature was about 670°C, optimized sintering temperatures was about 810°C, vickers hardness increased from 550 to 898 with an increase of 60%, maximum bending force increased from 1468 N to 1736 N with an increase of 18%, fracture deflection increased from 0.54mm to 0.65mm with an increase of 20%, and have a good combining ability between coating and metal substrate.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1630-1634
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1630
• Online since: December 2012
• Authors: Bao Liang Xu, En Ze Wang, Wei Gong, Xiaoan Yue
• Keywords: Fracture Toughness, Glass-Ceramics, Hardness, Sintering, Zro₂

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