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| 烧结制备Ag-Al电接触材料的组织和性能研究 |
| Study on the microstructure and properties of sintered Ag-Al electrical contact materials |
| 投稿时间：2020-06-29 |
| DOI： |
| 中文关键词: 电接触材料 Ag-Al 烧结 电学性能 力学性能 |
| 英文关键词: electricalcontact materials Ag-Al sintering electrical properties mechanical properties |
| 基金项目:国家自然科学基金项目(51977027,51967008)；云南省重大科技专项计划项目(2018ZE001)；教育部基本科研业务费项目(N2002007)；昆明贵研新材料科技有限公司R&D基金(2020040604) |
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| 中文摘要: |
| 分别用粉末冶金无压烧结和热压烧结技术制备了Ag-Al电接触材料，并通过场发射扫描电镜(FE-SEM)分析了其显微组织及成分分布，探讨了两种制备工艺及含铝量对Ag-Al电接触材料密度、硬度、电导率和耐压强度的影响。结果表明，热压烧结样品力学、电学性能均优于无压烧结样品，且热压样品随着含铝量增加，硬度、耐压强度升高，电导率下降；耐压强度主要受含铝量影响；烧结方式影响Ag-Al电接触材料显微组织，进而影响电弧侵蚀后Ag-Al电接触材料表面形貌和成分分布。 |
| 英文摘要: |
| Ag-Al electrical contact materials were prepared by pressureless sintering and hot-pressing sintering methods. Their microstructure and element distributions were studied by field emission scanning electron microscope (FE-SEM). The influence of sintering methods and Al contents on density, hardness, conductivity, and breakdown strength was investigated. The results showed that hot-pressing sintered samples exhibited better electrical and mechanical properties than pressureless sintering samples. The hardness and compressive strength of the hot-pressed sample increased with aluminum content, while its electrical conductivity decreased. The breakdown strength was mainly affected by Al contents. Sintering methods influenced the microstructure, surface morphology and composition distribution of Ag-Al electrical contact materialsafter arc erosion. |
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