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利用透射电子显微镜(TEM)、电子探针、X射线衍射仪等微观分析技术,研究了Al65Cu20Fe15准晶颗粒 Al基复合材料在不同热压工艺条件下的显微组织结构,以探明组织结构的变化对该新型复合材料性能的影响.结果表明,在热压扩散相变过程中,随热压温度的升高,准晶相中首先产生大量的微畴缺陷,某些方向上原子呈周期性排列,最后,转变为ω Al7Cu2Fe晶体相.热压时间和颗粒体积分数对颗粒的组织结构影响不明显.颗粒中的Cu原子扩散到基体中,结果在纯Al基体中析出θ′和θ Al2Cu相.
The microstructure of Al65Cu20Fe15 quasicrystalline Al matrix composites under different hot-pressing conditions was investigated by means of TEM, E-probe and X-ray diffraction. The results show that during the hot-pressure diffusion phase transformation, with the increase of hot-pressing temperature, a large number of micro-domain defects are generated in the quasicrystalline phase first, and the periodicity of the atoms in some directions And finally transformed into ω Al7Cu2Fe phase.The influence of hot pressing time and particle volume fraction on the microstructure of the particles was not obvious.The Cu atom in the particles diffused into the matrix and the results showed that θ ’and θAl2Cu phase precipitated in pure Al matrix .