SrCO3添加量对钨合金电极材料组织和性能的影响

Effect of SrCO3 content by mass on the microstructure and properties of tungsten alloy electrode materials

本文分析了SrCO3添加量（质量分数）对钨合金电极材料组织、密度、硬度、电导率、热导率的影响。结果表明:SrCO3质量分数在3%7%范围内对电极材料的组织均匀性影响不大;SrCO3质量分数为10%时,材料中部分区域出现了Sr3WO6的聚集,呈现出明显的组织不均。电极材料的相对密度随SrCO3质量分数增加缓慢降低,当SrCO3质量分数达到10%时,降低幅度加大。电极材料的硬度、电导率、热导率等性能随SrCO3质量分数增大而降低,当SrCO3质量分数达到10%时降低幅度加大,与相对密度随SrCO3质量分数增大而变化的趋势一致。在本文研究范围内,SrCO3最佳添加量（质量分数）为7%。

The effects of SrCO3 content by mass on the microstructure and properties of tungsten alloy electrode materials were investigated,such as relative density,hardness,electrical conductivity,and thermal conductivity.It is shown that,the microstructures can be hardly affected by the mass fraction of SrCO3 in the range of 3%7%.Sr3WO6 cluster is present,when the SrCO3 mass fraction increases to 10%,leading to the locally uneven microstructures.The relative density of tungsten alloy gradually decreases with the SrCO3 mass fraction increase; when the SrCO3 mass fraction reaches 10%,the reduction tendency becomes dramatically.As to other properties,such as electrical,thermal conductivity,and hardness,the results have the same tendency.In sum,the optimum mass fraction of SrCO3 is 7%.