高能激光束引燃Fe-Al系合金的制备与性能研究

Preparation and properties of Fe-Al alloy by laser-induced self-propagating reaction synthesis

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。

Fe-Al alloy was prepared by laser-induced self-propagating reaction synthesis and microstructure and properties of the alloy were examined by means of scanning electron microscopy,X-ray diffraction,microhardness measurement and wear test.The results show that the alloy is consists of Al-rich alloy phase and transition phase.Microstructure of the alloy is fine,and grain increases with increasing content of Al.When the content of Al is 70 at%,the porosity of the alloy reaches minimum value,and hardness of the alloy reaches the maximum value.The abrasion resistance of the alloy reaches the best,when the content of Al is 50 at%,and the mass loss is only 0.0011 g.