Pd/多孔TiAl合金基复合透氢膜的制备与性能  

Fabrication and characterization of Pd/porous TiA1 alloy composite membrane for hydrogen separation

作　　者：武治锋[1] 贺跃辉[1] 江垚[1] 汤烈明[1] 黄伯云[1] 徐南平[2] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]南京工业大学膜科学技术研究所,南京210009

出　　处：《材料研究学报》2008年第5期454-460,共7页Chinese Journal of Materials Research

基　　金：国家自然科学基金20476106;国家重点基础研究基金2003CB615707;国家自然科学基金重点20636020;国家自然科学基金委员会创新研究群体科学基金50721003资助项目~~

摘　　要：用反应合成法制备了Al质量分数为35%的多孔TiAl合金,用约束烧结优化孔结构后多孔体的最大孔径约2-3μm,用化学镀方法制备了Pd/多孔TiAl合金基复合透氢膜,研究了复合透氢膜的性能.结果表明,制备出的复合透氢膜为纯净钯膜,表面膜层致密,厚度约为7μm.在600℃以下,Pd/多孔TiAl合金复合膜具有良好的界面热稳定性.在500℃退火后复合膜具有优异的抗热震性能.退火后复合膜的氢分离性能为:在温度为500℃、压差为0.02-0.18 MPa条件下,复合膜的氢气平均渗透系数F为5.1×10^(-6)mol·m^(-2)·s^(-1)·Pa^(-1),H_2/N_2选择性为323-400.Porous Ti-35%Al Al intermetallic mixed titanium and aluminum elemental powders. copound was fabricated by the reactive synthesis of The porous TiAI alloy materials with the maximum pore size of 2-3 μm have been prepared by the optimized procedure. Pure Pd membrane on the porous TiAI alloy composite substrate was obtained by electroless plating. The experimental analysis showed that the surface membrane was fully dense about the thickness of 7 #m. There was no interdiffusion evidence between Pd and TiAI experienced heat treatment for an enough long time at 600℃. At 500℃ and the pressure difference of 0.02-0.18 MPa, the average hydrogen permeance of composite membrane was as high as 5.1×10^-6mol·m^-2·s^-1·Pa^-1 and the H2/N2 selectivity factor was 323-400.

关 键 词：复合材料 多孔TiAl基体 钯膜 化学镀 氢分离 

分 类 号：TG146[一般工业技术—材料科学与工程]