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首页> 外文期刊>Key Engineering Materials >Microstructure and Mechanical Properties of Al-Cu-Cr Quasicrystals/Al Matrix Composites synthesized by hot-pressing technique
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Microstructure and Mechanical Properties of Al-Cu-Cr Quasicrystals/Al Matrix Composites synthesized by hot-pressing technique

机译：热压合成Al-Cu-Cr准晶体/ Al基复合材料的组织和力学性能

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摘要

Microstructure and mechanical properties of 20% Al-Cu-Cr/Al composites synthesized by hot-pressing technique after annealing, quenching and aging was studied by means of X-ray diffractometer (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and uniaxial compressive test. Microstructure of Al-Cu-Cr particles in the composites after hot-pressing is mainly consist of icosahedral quasicrystals and which transformed into decagonal quasicrystals after annealing. Microstructure of matrix in the composites after hot-pressing, annealing, quenching and aging is pure Al, Al + Al_2Cu, supersaturated solid solution Al and Al + Al-Cu transition phases respectively. Hardness, fracture strength and the Young's modulus of the composites are improved by age-hardening.
机译：利用X射线衍射仪（XRD），扫描电子显微镜（SEM）和透射电子显微镜研究了热压技术退火，淬火和时效后合成的20％Al-Cu-Cr / Al复合材料的组织和力学性能。 （TEM）和单轴压缩试验。热压后复合材料中的Al-Cu-Cr颗粒的微观结构主要由二十面体准晶体组成，退火后转变为十方准晶体。经过热压，退火，淬火和时效处理后，复合材料中的基体组织分别为纯Al，Al + Al_2Cu，过饱和固溶体Al和Al + Al-Cu过渡相。通过时效硬化可以改善复合材料的硬度，断裂强度和杨氏模量。

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