(西安石油大学 材料科学与工程学院，西安 710065)
摘 要: 以Ti粉和高纯石英管为原料，结合冷等静压和真空烧结工艺，制备了以多孔钛为基体、Ti-Si金属间化合物为多孔膜层的复合多孔材料。通过XRD、EDS、SEM对烧结产物的物相组成、微观结构进行了观察分析。结果表明：该复合多孔材料Ti-Si金属间化合物多孔膜层的厚度为2~3 μm，孔径小于0.3 μm；同时研究了不同粉末粒度区间的Ti粉对Ti-Si多孔膜成膜均匀性的影响。本研究采用限域内原位反应烧结工艺通过一次烧结成功制备出以多孔钛为基体、Ti-Si金属间化合物为多孔膜层的复合多孔材料，为金属梯度多孔材料的制备提供了一种新途径。
关键字: 多孔膜材料；原位反应；Ti-Si金属间化合物；复合多孔材料
（College of Materials and Engineering, Xi’an Shiyou University, Xi’an 710065, China）
Abstract:Ti powder and high-purity quartz tube were used as raw materials, and combined with cold isostatic pressing and vacuum sintering process, a new porous material using porous titanium as matrix and Ti-Si intermetallic compound as porous membrane was prepared. The phase composition and microstructure of the sintered product were observed and analyzed by XRD, EDS and SEM. The results show that the thickness and pore size of the Ti-Si intermetallic compound porous membrane are 2-3 μm and less than 0.3 μm. At the same time, the effect of Ti powder in different particle size ranges on the uniformity of Ti-Si porous membrane was also studied. A composite porous material using porous titanium as matrix and Ti-Si intermetallic compound as porous membrane was successfully prepared by in-situ reaction sintering in a limited zone, which provides a new way for the preparation of metal gradient porous materials.
Key words: porous material; in-situ reaction; Ti-Si intermetallic compound; composite porous material
