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采用激光引燃自蔓延高温合成技术制备Fe-Al合金,利用扫描电镜、X射线衍射仪、显微硬度计、磨粒磨损试验机等对合成试样进行显微组织观察和性能测试。结果表明:合金是由富Al相和过渡相构成的多相结构;合金的显微组织比较细小,晶粒随着Al含量增加而增大;Al含量为70 at%时,孔隙率达到最小,此时试样硬度值最大;在50 at%Al时试样耐磨性最好,磨损量为0.0011 g。
The Fe-Al alloy was prepared by laser ignition self-propagating high temperature synthesis technology. The microstructure and properties of the synthesized samples were observed by scanning electron microscopy, X-ray diffraction, microhardness tester and abrasive wear tester. The results show that the alloy is a multi-phase structure composed of Al-rich phase and transition phase. The microstructure of the alloy is relatively small and the grain size increases with increasing Al content. When the Al content is 70 at%, the porosity reaches the minimum, At this point, the hardness of the sample is the highest, and the wear resistance is the best at 50 at% Al with the wear amount of 0.0011 g.