Research on the Preparation Process of High Temperature and Oxidation Resistant Coating for Graphite Mould
Research on high-temperature resistant and antioxidant coatings for graphite molds is conducted to improve their performance in response to the issue of graphite molds being prone to oxidation at high temperatures during production practice.In this article,Si layers on graphite substrates are prepared via plasma spraying technology.Metallographic microscopy,X-ray diffraction,and scanning electron microscopy are used to analyze the interface microstructure.In order to investigate the effects of coating thickness,post-treatment heating temperature,and insulation time on the Si layer,the interface bonding force is measured using a tensile testing equipment.The findings demonstrate that after 6 hours of insulation at 1380 °C,a consistent and continuous transition layer form at a coating thickness of 0.03 mm.The coating may shield the substrate from oxidation for up to 16 hours and has good mechanical and bonding strength.
graphite moldplasma sprayingSi coatinghigh temperature oxidation resistance
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