杨焜,牛少鹏,邓春明,宋进兵,邓畅光,刘敏.等离子喷涂Al2O3-3%TiO2涂层结构及加载绝缘性能[J].表面技术,2020,49(8):63-72.
YANG Kun,NIU Shao-peng,DENG Chun-ming,SONG Jin-bing,DENG Chang-guang,LIU Min.Microstructure and Load-insulation Performance of Plasma-sprayed Al2O3-3%TiO2 Coating[J].Surface Technology,2020,49(8):63-72
等离子喷涂Al2O3-3%TiO2涂层结构及加载绝缘性能
Microstructure and Load-insulation Performance of Plasma-sprayed Al2O3-3%TiO2 Coating
投稿时间:2020-03-20  修订日期:2020-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2020.08.008
中文关键词:  大气等离子喷涂  Al2O3-TiO2涂层  磁体支撑结构  显微结构  绝缘性能
英文关键词:atmospheric plasma spraying  Al2O3-TiO2 coating  magnet support structure  microstructure  insulation performance
基金项目:广东特支计划(2019BT02C629);广州市珠江科技新星专项(201710010130);广东省科学院实施创新驱动发展能力建设专项(2018GDASCX-0111);广东省科技计划项目(2017A070701027,2014B070705007)
作者单位
杨焜 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广州 510650 
牛少鹏 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广州 510650 
邓春明 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广州 510650 
宋进兵 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广州 510650 
邓畅光 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广州 510650 
刘敏 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广州 510650 
AuthorInstitution
YANG Kun National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China 
NIU Shao-peng National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China 
DENG Chun-ming National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China 
SONG Jin-bing National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China 
DENG Chang-guang National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China 
LIU Min National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China 
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中文摘要:
      目的 研究等离子喷涂Al2O3-3%TiO2涂层的抗低温冲击性能和外部载荷下的绝缘性能等综合性能,探讨大气等离子喷涂技术作为核聚变反应堆磁体支撑结构绝缘涂层制备方法的可行性。方法 采用大气等离子喷涂技术在喷砂处理的A286基体上制备Al2O3-3%TiO2涂层并进行封孔处理,利用XRD、SEM等手段对涂层的微观结构和常规性能进行表征,重点关注了涂层的低温热冲击性能和加载绝缘性能。结果 喷涂粉末充分熔融及铺展而沉积为典型的层叠状结构,涂层的结合强度达30 MPa,孔隙率可控制在5%以内。均匀涂刷在涂层表面的硅树脂封孔剂有利于填充涂层孔隙和微裂纹,封孔剂在涂层内部的渗透深度可达到大约100 μm。从室温水浴到液氮进行10个循环的热冲击试验后,涂层未发现裂纹和剥落,且热冲击对绝缘性能没有显著影响。250 MPa压缩载荷下,涂层的表面电阻率明显降低,但仍高于30 MΩ/sqr。结论 Al2O3-3%TiO2涂层可作为高载荷和低温环境下使用的潜在绝缘材料,而大气等离子喷涂将成为制备核聚变反应堆磁体支撑结构关键部件绝缘涂层的重要选择。
英文摘要:
      The work aims to study the comprehensive properties of plasma-sprayed Al2O3-3%TiO2 coating, including thermal shock resistance and load-insulation performance under external load, and explore the feasibility of using atmospheric plasma spraying to prepare insulating coatings for the magnet support structure of nuclear fusion reactor. Al2O3-3%TiO2 coating was fabricated on the grit-blasted A286 substrate by atmospheric plasma spraying and then sealing treatment was carried out to the as-sprayed coating. The microstructure and conventional propertie of the coating were studied by XRD and SEM. The low-temperature thermal shock resistance and load-insulation performance of the coating were mainly researched. The feedstock powders were melted and flattened sufficiently, and formed into typical multi-layer structure. The adhesion strength of the coating was above 30 MPa, and the porosity could be controlled below 5%. The silicone resinsealant brushed on the coating surface evenly could fill the coating pores and micro-cracks effectively, and the penetration depth of sealant was approximately 100 μm. No cracks and spallation were observed on the coating even after 10 cycles of thermal shock test from water bath at room temperature to liquid nitrogen and the thermal shock had no significant effect on the insulation performance. Under the compression load of 250 MPa, the surface resistivity of coating decreased obviously, but was still higher than 30 MΩ/sqr. Consequently, the Al2O3-3%TiO2 coating can be used as a potential material under high compression load and low-temperature environment, and atmospheric plasma spraying can become an alternative to manufacture insulating coating for the key parts in magnet support structure of nuclear fusion reactor.
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