摘要
目的在实现钼资源循环再利用的同时,提高钼合金高温抗氧化性能。方法将废弃硅钼棒破碎、球磨制成粉末,并结合玻璃粉和硅粉作为原料,采用浆料法在钼基体上制备MoSi2基抗氧化涂层。通过扫描电子显微镜、X射线衍射和1400℃静态等温氧化实验等分析涂层的微观组织、结构及抗氧化性能。结果制备的MoSi2基抗氧化涂层厚度约500μm,涂层整体上呈现出相对致密的结构。在1400℃氧化20h后,涂层质量增量为5.88mg/cm^2,呈现出较好的防氧化效果。结论利用浆料法,以废弃硅钼棒为原料,在实现钼资源回收再利用的同时,为钼合金表面制备具有较好抗氧化性能的MoSi2基抗氧化涂层。氧化过程中,涂层在表面形成了一层致密的SiO2玻璃,具有较强的阻氧能力,减少氧气向基体的渗入,可以在高温氧化环境有效提升钼基体的抗氧化能力。
Objective To improve the high temperature oxidation resistance of Mo alloys and recovery of Mo resources. Methods In this paper, waste MoSi2 heating elements were crushed and milled into powders, then the waste MoSi2, Si and glass powders were used to prepare MoSi2-based antioxidant coating on molybdenum substrates by slurry method. The oxidation re- sistance of the coating was tested by isothermal oxidation at 1400℃. Its microstructure and structure was analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Results The thickness of prepared MoSi2-basd coating was about 500μm and the structure of the coating was relatively dense. After oxidation at 1400 ℃ for 20 h, the coating exhibited a good anti-oxidation effect with a weight gain of 5.88mg/cm^2, presenting good oxidation resistant effect Conclusion While recovering and reusing Mo resources, the waste MoSi2 heating elements is used as raw materials to prepared MoSi2-based antioxidant coat- ing on molybdenum alloys by slurry method. During oxidation, a dense layer of SiO2 glass layer forming on the surface of the coating has strong oxygen resistance, which can effectively improve the oxidation resistance of Mo substrates in high tempera- ture oxidation environment by reducing oxygen infiltration into the substrate.
作者
陈鹏
朱路
任宣儒
康学勤
王晓虹
冯培忠
CHEN Peng;ZHU Lu;REN Xuan-ru;KANG Xue-qin;WANG Xiao-hong;FENG Pei-zhong(School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China)
出处
《装备环境工程》
CAS
2019年第10期55-58,共4页
Equipment Environmental Engineering
基金
国家自然科学基金项目(51574241,51602342,51874305)
