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Published on: July 10, 2014
Development of High-Performance Enamel Coating on Grey Iron by Low-Temperature Sintering
Dan Song1,2, Ren Tang3, Falin Yang4
1College of Mechanics and Materials, Hohai University, Nanjing 210098, China. songdancharls@hhu.edu.cn.
Abstract:
In this study, we report on a low-temperature sintered enamel coating with a high-strength bonding and wear-resistance that protected a grey cast iron substrate. The SiO₂⁻Al₂O₃⁻B₂O₃ composited prescription for the enamel coating was modified by the partial substitutions of SiO₂ for B₂O₃ and alkali metals for Li₂O. The optimized enamel coating was prepared by sintering at a relatively low temperature (730 °C) for seven minutes. Due to the composition of both the amorphous and crystalline phases, the enamel coating presented sufficient hardness and excellent wear resistance. The wear volume loss and the specific wear rate of the enamel coating were obviously lower than that of the metal substrate. The enamel coating can effectively improve the service life of the grey cast iron substrate in a complex frictional environment.
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