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| Recycling Waste MoSi2 Heating Elements to Fabricated MoSi2-based Anti-oxidation Coatings |
| Received:May 21, 2019 Revised:June 03, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.10.009 |
| KeyWord:MoSi2 coatings high temperature oxidation resistance waste MoSi2 |
| Author | Institution |
| CHEN Peng |
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou , China |
| ZHU Lu |
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou , China |
| REN Xuan-ru |
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou , China |
| KANG Xue-qin |
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou , China |
| WANG Xiao-hong |
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou , China |
| FENG Pei-zhong |
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou , China |
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| Abstract: |
| 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 resistance 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 500 μm 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/cm2, 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 coating 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 temperature oxidation environment by reducing oxygen infiltration into the substrate. |
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