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通过自蔓延技术合成MoSi2粉体,并添加CeO2、ZrO2粉末制备了不同体积分数的CeO2-ZrO2-MoSi2复合材料,采用扫描电镜观察了复合材料的微观形貌.实验研究表明:复合材料在高温烧结后的致密度较高,其力学性能较好,其中以MSZC3的效果最好,其致密度、抗弯强度和断裂韧性分别为96%、268.8MPa和6.28MPa·m1/2.ZrO2颗粒同时实现了室温相变韧化和弥散强化的双重作用,显著提高了复合材料的韧性与强度.图2,表3,参10.
MoSi2 powders were synthesized by SHS technique and CeO2-ZrO2-MoSi2 composites with different volume fractions were prepared by adding CeO2 and ZrO2 powders. The microstructure of the composites was observed by scanning electron microscopy. The experimental results show that the composites sintered at high temperature The higher the density, the better mechanical properties, of which MSZC3 the best, the density, flexural strength and fracture toughness were 96%, 268.8MPa and 6.28MPa · m1 / 2.ZrO2 particles at the same time The dual role of phase transformation toughening and dispersion strengthening at room temperature, significantly improve the toughness and strength of the composite material. Figure 2, Table 3, Senate 10.