放电电压对Ag-30vol% Ti<sub>3</sub>SiC<sub>2</sub>复合材料电弧烧蚀性能的影响

放电电压对Ag-30vol% Ti₃SiC₂复合材料电弧烧蚀性能的影响

摘要: 采用热压烧结法制备Ag-30vol% Ti₃SiC₂ 复合材料，Ti₃SiC₂ 颗粒均匀分布于Ag 基体上，无团聚和扩散现象。分别在3、6、8 和10 kV 的放电电压下，对Ag-30vol% Ti₃SiC₂ 复合材料进行了电弧烧蚀试验。结果表明，随着放电电压的增加，电弧能量增加，电弧扩散更加明显，烧蚀面积逐渐增大，烧蚀坑越来越深。Ag-30vol% Ti₃SiC₂ 材料表面形成喷溅、凸起、气孔和“龟裂”的显微形貌。经过电弧烧蚀后，Ag-30vol% Ti₃SiC₂ 复合材料发生分解，并氧化生成AgO、Ag₂O、SiO₂ 和TiO₂。

Abstract: Ag-30vol% Ti₃SiC₂ composite was fabricated by hot-press sintering, and Ti₃SiC₂ particles were uniformly distributed on Ag matrix without agglomeration and diffusion.The arc erosion was applied on the Ag-30vol% Ti₃SiC₂ composites with the discharge voltage at 3, 6, 8, 10 kV consequently.The results show that with the increase of discharge voltage, the arc energy increases, the arc diffusion becomes more obvious, the ablation area increases gradually, and the ablation pit becomes deeper and deeper.The morphologies of spattered, raised, blowhole and "crack" are formed on the surface of the Ag-30vol% Ti₃SiC₂ material, and after arc erosion, Ag-30vol% Ti₃SiC₂ composites are decomposed and oxidized into AgO, Ag₂O, SiO₂ and TiO₂.