| 引用本文: | 祝志祥,韩钰,陈新,马壮,杨长龙,张宏宇.等离子喷涂Li0.5Fe2.5O4防护涂层及其表征[J].中国表面工程,2016,29(6):107~112 |
| ZHU Zhi-xiang,HAN Yu,CHEN Xin,MA Zhuang,YANG Chang-long,ZHANG Hong-yu.Preparation and Characterization of Li0.5Fe2.5O4 Coatings by Plasma Spraying Process[J].China Surface Engineering,2016,29(6):107~112 |
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| 等离子喷涂Li0.5Fe2.5O4防护涂层及其表征 |
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祝志祥1,2, 韩钰1,2, 陈新1,2, 马壮3, 杨长龙4, 张宏宇4
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1.全球能源互联网研究院 先进输电技术国家重点实验室, 北京 102211;2.全球能源互联网研究院 电工新材料研究所, 北京 102211;3.北京理工大学 材料学院, 北京 100081;4.国网辽宁省电力有限公司, 沈阳 110004
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| 摘要: |
| 以Li2CO3和Fe2O3粉末为原料，通过高温固相煅烧、喷雾造粒及热处理制备出纯净单相的Li0.5Fe2.5O4热喷涂粉体，采用等离子喷涂技术在Q235钢表面沉积出Li0.5Fe2.5O4铁氧体涂层，并研究其微观组织结构、物理电气和耐腐蚀性能。结果表明，热喷涂制备的Li0.5Fe2.5O4涂层表面致密均匀，平均孔隙率为4.1%，且与钢基体具有良好的界面结合，结合强度平均值为27.6 MPa，涂层电阻率为2.14×10-5 Ω·m，且涂层耐电化学腐蚀性能良好，3.5% NaCl溶液介质中的平均腐蚀速率约为0.003 7 mm/a，显示等离子喷涂制备的高质量Li0.5Fe2.5O4涂层可较好满足接地材料防护涂层对其耐蚀和导电性方面的要求，可作为一种有效的腐蚀防护措施应用在传统钢质接地材料防腐工程中。 |
| 关键词: 等离子喷涂 防护 铁氧体 接地材料 |
| DOI：10.11933/j.issn.1007-9289.2016.06.015 |
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| 基金项目:国家电网公司科技项目（5455DW120005，5455DW150015） |
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| Preparation and Characterization of Li0.5Fe2.5O4 Coatings by Plasma Spraying Process |
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ZHU Zhi-xiang1,2, HAN Yu1,2, CHEN Xin1,2, MA Zhuang3, YANG Chang-long4, ZHANG Hong-yu4
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1.State Key Lab of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute, Beijing 102211;2.Institute of New Electrical Materials, Global Energy Interconnection Research Institute, Beijing 102211;3.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081;4.State Grid Liaoning Electric Power Supply Co. Ltd., Shenyang 110004
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| Abstract: |
| High temperature solid state calcination, spray granulation and thermal treatment were employed to synthesize pure Li0.5Fe2.5O4 powders with Li2CO3 and Fe2O3 powders as raw materials. The Li0.5Fe2.5O4 ferrite coatings were prepared on the steel substrate via the plasma spraying technology. The phase and microstructure, physical and electrical properties, as well as corrosion resistance were studied. The results show that the surface of the coatings is dense and uniform with an average porosity of 4.1%. Additionally, the mean adhesion strength of the coating is 27.6 MPa, the resistivity of Li0.5Fe2.5O4 coating is about 2.14×10-5 Ω·m, and the electrochemical corrosion rate is about 0.003 7 mm/a in the 3.5% NaCl solution medium. The high-quality coatings can meet the requirements of corrosion resistance and conductivity for the grounding materials, which can be used as an effective protection measurement for the traditional steel grounding materials. |
| Key words: plasma spraying protection ferrite grounding materials |
