In-situ TiC/Ni composite with Ta element was fabricated by reactive sintering. Ta element solid solubilizes in TiC particles and Ni matrix. The addition of Ta reduces the oxidation rate of TiC at initial stage of oxidation, and suppresses the outward diffusion of Ti atom and inward diffusion of O atom after the formation of oxide scale, leading to the decrease of TiO₂ and NiTiO₃ content in oxide scale. The oxidation resistance of composites is optimized. Ta element improves the electrical conductivity of composites at 800 °C by increasing electron concentration in oxide scale and reducing the thickness of oxide scale.

中文翻译：

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Ta对原位TiC/Ni复合材料抗氧化性能的影响

采用反应烧结法原位制备了含有 Ta 元素的 TiC/Ni 复合材料。Ta元素固溶在TiC颗粒和Ni基体中。_{Ta的添加降低了TiC氧化初期的氧化速率，抑制了氧化皮形成后Ti原子向外扩散和O原子向内扩散，导致氧化物中TiO 2}和NiTiO ₃含量降低规模。复合材料的抗氧化性得到优化。Ta元素通过增加氧化皮中的电子浓度和减少氧化皮的厚度来提高复合材料在800℃下的导电率。