粉末冶金技术2025，Vol.43Issue(5)：548-558,576,12.DOI:10.19591/j.cnki.cn11-1974/tf.2024070007
钼合金表面熔盐法制备硅化物涂层工艺
Preparation process of silicide coatings on molybdenum alloy surface by molten salt method
摘要
Abstract
Using Na2B4O7,B4C,NaCl,KC1,NaF,Na2SiF6,and Si powders as the molten salt components,the Mo-Si-B composite coatings were prepared on the surface of molybdenum alloys by the molten salt method.The influence of B content on the microstructure and oxidation resistance of the composite coatings was investigated.The results show that when the B content in the molten salt is 0.4 moL per 500 g of molten salt,the Mo-Si-B composite coatings prepared are intact,the main component is MoSi2,and the coating thickness is 12.17 μm,exhibiting the good oxidation resistance at temperatures ranging from 800 to 1200 ℃.When the B content increases to more than 0.6 moL per 500 g of molten salt,the main component of the coatings becomes MoB.However,the Mo-Si-B composite coatings are not successfully prepared,and the antioxidant capacity of the coatings is poor.With the B content increases,the surface hardness of the coatings decreases,and the oxidation resistance of the coatings gradually declines.However,during the high-temperature oxidation at 1200 ℃,the SiO2 phases are gradually formed on the silicides and adhered to the coating surface,hindering the oxygen transmission and enhancing the oxidation resistance of the molybdenum alloys.关键词
Mo-Si-B复合涂层/钼合金/抗氧化性能/B含量/熔盐法Key words
Mo-Si-B composite coatings/molybdenum alloys/oxidation resistance/B content/molten-salt method分类
矿业与冶金引用本文复制引用
王力,王兆宇,胡平,韩嘉彧,赵卫国,高黎黎,王快社..钼合金表面熔盐法制备硅化物涂层工艺[J].粉末冶金技术,2025,43(5):548-558,576,12.基金项目
中国科协青年人才托举计划 （）
国家自然科学基金青年项目资助项目(52404410) （52404410）
陕西省三秦英才引进计划青年项目 （）
陕西省自然科学基础研究计划一般项目-青年项目(2024JC-YBQN-0367) （2024JC-YBQN-0367）
