Pd/Ti-Al合金复合膜表面缺陷的影响因素  

Influence factors of surface defects of Pd/Ti-AI alloy composite membranes

作　　者：张栋强[1] 陈日志[1] 范益群[1] 徐南平[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第1期1-4,29,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20636020);江苏省高校优势学科建设工程资助项目(PAPD)

摘　　要：金属基Pd复合膜在高温下易产生小孔缺陷,目前对造成膜表面小孔缺陷的主要原因尚不清楚。借助环境扫描电镜(SEM)考察了气氛环境、高温烧结以及金属间相互扩散等因素对Pd/Ti-Al合金复合膜表面性能的影响。结果发现:气氛环境、高温烧结和金属间相互扩散都会对Pd复合膜的性能产生一定的影响,但是高温下Pd与Ti-Al合金间相互扩散是Pd/Ti-Al合金复合膜表面小孔缺陷形成的最主要影响因素。Defects were easily formed on the surface of the metal-supported Pd composite membranes at high temperatures.The main factor for causing surface defects was not known.The influences of different atmospheres,sintering and intermetallic diffusion on the surface performance of Pd/Ti-Al alloy composite membranes were investigated by scanning electron microscope（SEM）.The results showed that all of these factors had some effects on the performance of Pd/Ti-Al alloy composite membranes,and the intermetallic diffusion between Pd and Ti-Al alloy was main factor for causing surface defects of Pd/Ti-Al alloy composite membranes at high temperatures.

关 键 词：PD膜 TI-AL合金 相互扩散 小孔缺陷 

分 类 号：TB383[一般工业技术—材料科学与工程]