【摘要】 采用Ti粉和Al粉为原料，通过限域原位反应烧结技术在石英管内制备了Ti-Al多孔材料。使用X射线衍射仪（XRD）、能谱仪（EDS）和扫描电镜（SEM）对多孔材料的物相组成、元素含量和微观形貌进行了分析，并以检测结果为基础，对原位反应烧结机理及物相演变路径进行了研究。采用多孔材料完整性测试仪对多孔材料的过滤性能进行了测试，研究了Al粉添加量对多孔材料最大冒泡孔径、相对透气系数和孔径分布的影响。结果表明：多孔材料中Si元素含量随着Al粉添加量的增大而逐渐提高，说明Al元素的添加对SiO₂的分解及分解后Si原子向Ti-Al多孔基体中的扩散有促进作用，并伴有Ti-Si金属间化合物生成。当Al粉添加量为36%时，多孔材料的主相为TiAl,次生相为TiAl₂;当Al粉添加量为50%时，相组成主要为TiAl₃、TiAl₂以及少量的Ti₅Si₃;而当Al粉添加量为62%时，相组成为TiAl₃、TiAl₂和TiSi₂。当Al粉添加量分别为36%、50%和62%时，由于Ti-Al混合粉末粒径分布的变化，随着Al粉添加量的不断增加，多孔材料的最大冒泡孔径、相对透气系数和平均孔径皆呈先增加后降低的变化趋势。更多还原

【Abstract】 Ti-Al porous materials were prepared in quartz tubes using Ti powder and Al powder as raw materials through limited domain in situ reaction sintering technology. Phase composition, element content and micro morphology of the porous materials were analyzed by means of X-ray diffractometer（XRD）, energy dispersive spectrometer（EDS） analysis and scanning electron microscopy（SEM）. Based on the test results, the mechanism of in-situ reaction sintering and the evolution path of phase were studied. The filtration performance of the porous materials was tested using a porous material integrity tester, and the effects of Al powder addition on the maximum bubble size, relative permeability coefficient and pore size distribution of the porous materials were studied. The results show that the content of Si element in the porous materials gradually increases with the increase of Al powder addition, indicating that the addition of Al element promotes the decomposition of SiO₂ and the diffusion of Si atoms into Ti-Al porous matrix after decomposition, accompanied by the formation of Ti-Si intermetallic compounds. When the amount of Al powder added is 36%, the main phase of the porous materials is TiAl, and the secondary phase is TiAl₂; when the amount of Al powder added is 50%, the phase composition is mainly TiAl₃, TiAl₂ and a small amount of Ti₅Si₃; when the amount of Al powder added is 62%, the phase composition becomes TiAl₃, TiAl₂ and TiSi₂. When the addition amount of Al powder is 36%, 50% and 62%, respectively, due to the changes in the particle size distribution of Ti-Al mixed powder, the maximum bubble pore size, relative permeability coefficient and average pore size of the porous materials show a trend of first increasing and then decreasing with the increase of Al powder addition.更多还原