摘要
采用以肼为还原剂的化学镀液,在多孔不锈钢载体上制备钯复合膜,研究钯复合膜的形核、长大及成膜机理。结果表明,载体经敏化/活化处理后,表面获得了均匀分散的纳米晶核,化学镀时,钯沿着晶核均匀长大,逐渐成膜。为了抑制载体的氢脆,增加载体与钯膜之间的结合力,载体预镀一薄层钯膜后再对载体作封孔处理,在孔径较大的不锈钢载体上获得了无裂缝、薄而致密的复合钯膜。
Using the electroless plating solution with N2H4 as reducing agent, the Pd-composite membranes were prepared on the porous stainless steel substrate. The nucleation, growth and forming mechanism of the Pd-composite membrane were investigated. The resultes show that the homogenously dispersed Pd nano-nuclei were desposited on the substrate surface after sensitization and activation pre-treatmentof the porous substrate. During the electroless plating process, the Pd nano-nuclei grew granually to be thin and dense pallidium membrane. In order to reduce the hydrogen embrittlement of the porous substrate and improve the adhesion strength of the Pd membrane on porous substrate, it necessary to pre-plated a thin Pd membrane on the porous substrate before filling pore treatmen. As a result, a thin and dense pallidium composite membrane without fissures were obtained on porous substrate with larger pores.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期1901-1904,共4页
Rare Metal Materials and Engineering
关键词
钯复合膜
化学镀
多孔不锈钢
Pal-composite membrane
electroless plating
porous stainless steel
