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SiC ceramic particle surface modification process
The invention discloses a SiC ceramic particle surface modification process. The process comprises the following steps: pretreating SiC particles; preparing surface modified slurry; and carrying out surface modification treatment on the SiC particles. According to the process, a MoSi2 intermetallic compound film is formed on the surface of the SiC particles. The film can form Mo-Si-C bonds withtheSiC particles and has good bonding performance with the SiC particles. A ceramic prefabricated body is prepared by using the coated SiC particles, then, a SiC/Fe-based composite material is preparedby adopting a casting method; the wettability of the SiC particles and the molten iron alloy is good; the MoSi2 film on the surface of the SiC particles can inhibit harmful chemical reaction between the molten iron and the SiC particles; the SiC particles can form firm interface bonding with the iron alloy matrix, the SiC particles cannot fall off from the surface of the iron alloy matrix due to low interface bonding strength under a wear load, and the wear resistance of the SiC/Fe composite material can be improved by more than 50%.
本发明公开了一种SiC陶瓷颗粒表面改性工艺，步骤如下：SiC颗粒的预处理；表面改性料浆的制备；SiC颗粒的表面改性处理。本发明工艺在SiC颗粒表面形成MoSi金属间化合物薄膜。该薄膜能与SiC颗粒形成Mo‑Si‑C键，与SiC颗粒结合性良好。用涂膜后的SiC颗粒制成陶瓷预制体，然后采用浇铸法制备SiC/Fe基复合材料材料时，SiC颗粒与熔融的铁合金润湿性良好，SiC颗粒表面的MoSi薄膜能抑制铁水与SiC颗粒产生有害的化学反应，SiC颗粒能与铁合金基体形成牢固的界面结合，在磨损载荷下SiC颗粒不会因为界面结合强度低而从铁合金基体表面脱落，能将SiC/Fe复合材料的耐磨性提高50%以上。
SiC ceramic particle surface modification process
The invention discloses a SiC ceramic particle surface modification process. The process comprises the following steps: pretreating SiC particles; preparing surface modified slurry; and carrying out surface modification treatment on the SiC particles. According to the process, a MoSi2 intermetallic compound film is formed on the surface of the SiC particles. The film can form Mo-Si-C bonds withtheSiC particles and has good bonding performance with the SiC particles. A ceramic prefabricated body is prepared by using the coated SiC particles, then, a SiC/Fe-based composite material is preparedby adopting a casting method; the wettability of the SiC particles and the molten iron alloy is good; the MoSi2 film on the surface of the SiC particles can inhibit harmful chemical reaction between the molten iron and the SiC particles; the SiC particles can form firm interface bonding with the iron alloy matrix, the SiC particles cannot fall off from the surface of the iron alloy matrix due to low interface bonding strength under a wear load, and the wear resistance of the SiC/Fe composite material can be improved by more than 50%.
本发明公开了一种SiC陶瓷颗粒表面改性工艺，步骤如下：SiC颗粒的预处理；表面改性料浆的制备；SiC颗粒的表面改性处理。本发明工艺在SiC颗粒表面形成MoSi金属间化合物薄膜。该薄膜能与SiC颗粒形成Mo‑Si‑C键，与SiC颗粒结合性良好。用涂膜后的SiC颗粒制成陶瓷预制体，然后采用浇铸法制备SiC/Fe基复合材料材料时，SiC颗粒与熔融的铁合金润湿性良好，SiC颗粒表面的MoSi薄膜能抑制铁水与SiC颗粒产生有害的化学反应，SiC颗粒能与铁合金基体形成牢固的界面结合，在磨损载荷下SiC颗粒不会因为界面结合强度低而从铁合金基体表面脱落，能将SiC/Fe复合材料的耐磨性提高50%以上。
SiC ceramic particle surface modification process
一种SiC陶瓷颗粒表面改性工艺
XIE ZHIYONG (author) / XU TAO (author) / XIONG HUI (author) / LIU XIAOPAN (author) / GAO PENGZHAO (author)
2020-04-28
Patent
Electronic Resource
Chinese