银氧化锡触点材料电性能模拟试验与电接触失效机理的研究

The “high reliability and long life” development trend of low-voltage apparatus increasingly demands of improving electrical performance of contact material. Firstly, this project designs and develops an in-situ test system for the electrical performance of contact material, and then studies the optimum test condition combinations with the help of electrical performance parameters sensitivity matrix and clustering algorithm. With that a reasonable evaluation method of the making ability, breaking ability, anti-pollution ability and environmental adaptation ability of electrical performance of silver tin oxide contact material will be proposed explicitly. Based on the electrical performance degradation data and past failure data, the project builds an electrical contact degradation track model represented by the linear cumulative model and the degradation rate model. On one hand, the project develops a test method of prediction and evaluation to electrical life of contact material, which is beneficial to determine the electrical contact failure pattern, failure mechanism and failure incentives of silver tin oxide contact material combining with physical and chemical analysis for another hand. In this way the project is able to determine the micro-structure evaluation laws of material. The research results could effectively accelerate the presence of test standard for contact material belonging to the electrical alloy industry, and decrease the failure rate of low-voltage apparatus.

低压电器“高可靠、长寿命” 的发展趋势使得其对触点材料电性能的需求日益增长。本项目首先设计开发触点材料电性能综合测试分析系统平台，进而基于电性能参数敏感度矩阵和聚类算法获得最佳实验条件，研究银氧化锡触点材料接通能力、断开能力、抗污染能力和环境适应能力的评价考核方法。基于电性能退化数据和历史失效数据分析挖掘，构建以线性累积模型和退化率模型为代表的电接触退化轨迹模型，一方面形成触点材料电寿命试验方法，实现对触点材料电寿命的预测和评估，另一方面结合理化分析手段实现对银氧化锡触点材料电接触失效模式、失效机理、失效诱因的确定，进而确定材料组织结构演化规律。研究成果可有效带动电工合金行业触点材料实验评价标准方法的形成，同时有效解决由电接触问题导致的低压电器产品失效率等级不高的问题。