江宁远,凤仪,范贤捷,刘铸汉,于淼,张天源,王娟

• 1:合肥工业大学材料科学与工程学院
• 2:合肥职业技术学院机电工程学院

摘要(Abstract)：

采用化学共沉淀法制备了La_2Sn_2O_7粉末，并使用真空热压烧结法制备出Ag-Ni-La_2Sn_2O_7(85∶12∶3)复合材料。分别在空气、N_2和SF_6气氛中对Ag-Ni-La_2Sn_2O_7复合材料进行电弧烧蚀实验，通过热场发射扫描电镜(SEM)和三维激光共聚焦扫描显微镜(3D LSCM)对复合材料烧蚀后的表面形貌进行分析，使用能谱仪(EDS)和X射线光电子能谱(XPS)对烧蚀后的样品成分进行分析。分析了Ag-Ni-La_2Sn_2O_7复合材料在不同气氛中的电弧烧蚀行为及机理。结果表明：Ag-Ni-La_2Sn_2O_7复合材料在空气和N_2气氛中烧蚀区域面积大、表面起伏小，在SF_6气氛中烧蚀区域面积显著缩小，伴随的是表面起伏程度增大。在空气气氛中电弧烧蚀后金属元素均被氧化，生成Ag_2O、NiO、La_2O_3和SnO_2,在N_2气氛中由于O~(2-)不足，电弧烧蚀后生成La_2O_3、NiO和部分SnO_2,剩余部分Sn和Ag保持金属态，在SF_6气氛中电弧烧蚀后金属元素被氟化，生成AgF、NiF_2、LaF_3和SnF_4。

关键词(KeyWords)： Ag-Ni-La_2Sn_2O_7复合材料;不同气氛;耐电弧烧蚀性能;电弧烧蚀机理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51871085);; 2023年安徽省高校科研重大项目(2023AH040340);; 2023年合肥职业技术学院校级科研重点项目(2023RCKJA02)

作者(Author): 江宁远,凤仪,范贤捷,刘铸汉,于淼,张天源,王娟

DOI: 10.13289/j.issn.1009-6264.2023-0525

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