FeAl论文：FeAl基多孔材料的制备及其性能的研究.docVIP

FeAl论文：FeAl基多孔材料的制备及其性能的研究 【中文摘要】多孔材料是一种性能优异的功能结构材料,被广泛应用于多种场合,如气体液体过滤、分离、煤气化、烟气过滤净化、催化剂载体等。在高温、氧化与硫化腐蚀等环境中常规的材质难以满足日益增加的工程需求。FeAl金属间化合物以其优良的抗高温腐蚀性能和机械加工性能而备受关注。本文采用元素粉未固相扩散+高温反应烧结工艺,实现了FeAl基多孔材料的可控制备。采用机械球磨的方法制备Fe/Al复合粉末,并进行一定的预合金化。通过DSC、XRD以及SEM等分析技术,研究了球磨时间、球磨转速等工艺参数对复合粉末演变的影响。深入研究了制备工艺参数对多孔材料的体积膨胀率、孔隙率、物相反应以及孔的成形的影响规律。搭建了高温氧化、高温硫化及多孔材料透过率实验装置,对所制备的FeAl基多孔材料性能进行了性能表征。研究表明,在600℃经50h空气氧化,FeAl多孔材料质量仅增加0.06%,远优于316L多孔材料0.15%的增重率；在600℃经60h硫化,FeAl多孔材料增重率仅为0.13%,远优于316L多孔材料5.3%的增重率。经测定,所制备的FeAl多孔材料最可几孔径8μm,气体渗透率可达0.7×10-12m2。采用元素粉末固相扩散+高温反应烧结工艺所制备的多孔材料具有优异的综合性能。 【英文摘要】Porous material, as a kind of excellent functional structure materials, is widely used in various occasions, such as gas liquid filtration, separation, coal gasfication, flue gas purification, catalyst carrier, et al. At high temperatures oxidizing and sulfidizing corrosion environment, the conventional materials are difficult to meet the increasing challenges. FeAl based porous material gets more and more attention for its excellent resistant and mechanical manufacture performances.This paper studied the controllable preparation of FeAl intermatellic compounds porous materials by the means of elemental powder solid phase diffusion followed by high temperature reaction sintering technology. Fe/Al composite powders were produced by high-energy ball milling. By the means of DSC, XRD and SEM, the microstructure evolution of Fe/Al powders affected by milling time and milling rotational speed was studied. The effect of process parameters on volume expansion, porosity, phase response as well as the hole forming were investigated. High temperature oxidation, sulfidation and porous material permeability experiment device were built for the properties characterization of the prepared FeAl based porous material. Result showed that, at 600℃after 50h air oxidation, the FeAl porous material had a weight gain of 0.06%, far better than the 0.15% weight gain of 316L porous material; at 600℃after 60h sulfidation, FeAl poro