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通过研究自蔓延高温反应合成的预制件TiC-Ni3Al与金属间化合物Ni3Al的浸润性、渗透性能和渗透动力学,采用SEM、EDS、XRD和金相显微镜等测试分析手段,对复合材料的显微组织进行分析,探讨复合材料熔渗过程中组织的演化形成、组织和性能的关系以及复合物强化机制等。结果表明金属间化合物Ni3Al与预制件TiC-Ni3Al具有很好的浸润性,在一定温度条件下可形成致密无缺陷的组织。Ni3Al与预制件TiC-Ni3Al在熔渗过程中保持各自的化学稳定性,在渗透过程中无新相产生。Ni3Al在预制件TiC-Ni3Al中的渗透深度与渗透时间呈抛物线关系,渗透速度随渗透时间的增加而降低,且随预制件相对密度的增大而降低。
By investigating the infiltration, permeability and penetration kinetics of TiC-Ni3Al and intermetallic Ni3Al synthesized by self-propagating high-temperature reaction, the microstructures of the composites were studied by means of SEM, EDS, XRD and metallographic microscope Organizations were analyzed to explore the evolution of the formation of the organization infiltration process of composites, the relationship between the organization and performance, as well as the complex strengthening mechanism. The results show that the intermetallic compound Ni3Al and the preform TiC-Ni3Al have a good infiltration, under certain temperature conditions can form dense and defect-free organization. Ni3Al and the preform TiC-Ni3Al maintain their respective chemical stability during infiltration, and no new phase is generated during infiltration. The infiltration depth and penetration time of Ni3Al in the preform TiC-Ni3Al are parabolic. The infiltration velocity decreases with the increase of infiltration time, and decreases with the relative density of preform.