Ti3SiC2微滤膜的反应合成及孔隙形成机理

Ti3SiC2是一种典型的MAX相金属陶瓷，兼具陶瓷和金属材料的性能优点，如优异的抗环境腐蚀性能，良好的力学性能和可机加工性能等，在极端条件下的环保、过程分离、节能减排等领域具有广阔的应用前景。本项目提出，采用反应合成法制备Ti3SiC2微滤膜材料，研究Ti3SiC2微滤膜反应合成过程及孔结构形成机理，主要内容包括：探讨钛、硅、碳元素粉末反应合成过程及孔隙形成的热力学条件；揭示钛、硅、碳元素粉末反应合成过程中孔结构演变随合成参数变化的动态规律；研究钛、硅、碳三元体系中合成条件、反应过程参数以及微观结构变化参数之间的定量关系。作为潜在的固气分离过滤材料，研究成果可实现Ti3SiC2微滤膜的近净成形合成及孔结构的定量控制。

As a typical MAX phase metallic ceramic, Ti3SiC2 has the advantages of ceramics and metals, such as excellent environment corrosion resistivity, good mechanical properties and mechinability. Ti3SiC2 shows great application potential in enviromental protection, industrial separation and pollution reduction in rugged environments. Ti3SiC2 micro-filtration membrane material fabricated through a reactive synthesis method is presented in this project, in which the reactive synthesis procedure and the pore structure formation mechanism of Ti3SiC2 micro-filtration membrane are to be investigated. The main investigation content includes: (1) the reactive synthesis procedure of Ti, Si and C elemental powders and the thermal condition of pore formation; (2) the evolution of pore structure with synthesis parameters in the procedure of reactive synthesis of Ti, Si and C elemental powders; (3) the quantitative relationship between the synthesis condition, reactive process parameter and microstructures. The quantitative control of the reactive synthesis and pore structure can be realized, and the investigation results have the great industrial application potentials.