原位反应TiCP/3 Crl 3复合材料的抗氧化性能研究

研究了原位反应法制备的TiCp/3Crl3钢基复合材料在850℃和950℃的抗 氧化性能．结果表明：与基体合金相比，在850℃条件下，由于TiC颗粒的引入，复合 材料在氧化初期具有短路扩散效应，稳定阶段它的氧化动力学曲线符合对数增长规 律，氧化膜由棱角多面体状的Cr2O3组成，复合材料具有理想的氧化膜结构和优良的 抗氧化性能；在950℃条件下，氧化膜由粗大的FeO·Cr2O3组成，氧化膜致密度下降， 复合材料的抗氧化性能提高不多．，The oxidation resistance of TiC paniculate reinforced 3Cr13 matrix composites prepared by in-situ process at a temperature of 850 ℃ and 950 ℃ has been investigated, the results showed that, com pared to 3Cr13 matrix, the short path diffussional effect is caused by TiC phase at initial oxiding stage, the cruves for oxiding kinetics of comoposite agrees with the law of logarithmic growth. The oxide film consists of polyhedron-like Cr2O3, the composite has an ideal structure of oxide film and excellent oxida tion resistance at 850 ℃. The oxidation resistance of composite increases a little at 950 ℃ due to the de crease in compactivity of oxide film and the increase in size of (FeO· Cr2O3) oxide.

Oxidation Resistance of TiC Particulate Reinforced 3Cr13 Matrix Composites Prepared by In-Situ Process

The oxidation resistance of TiC paniculate reinforced 3Cr13 matrix composites prepared by in-situ process at a temperature of 850 ℃ and 950 ℃ has been investigated, the results showed that, com pared to 3Cr13 matrix, the short path diffussional effect is caused by TiC phase at initial oxiding stage, the cruves for oxiding kinetics of comoposite agrees with the law of logarithmic growth. The oxide film consists of polyhedron-like Cr2O3, the composite has an ideal structure of oxide film and excellent oxida tion resistance at 850 ℃. The oxidation resistance of composite increases a little at 950 ℃ due to the de crease in compactivity of oxide film and the increase in size of (FeO· Cr2O3) oxide.