The Mechanism of the Formation of Galvanically Substituted Cu-Films

概要

論文の詳細を見る
The following results were obtained on the mechanism of the formation of Cu-films, which were precipitated and developed over the Fe face by means of galvanic substitution of Cu salt.(1) Cu-films consisted of 2 layers; i.e., the one of plate crystals of about 1μin thickness and coherently developed over the Fe face, and the other of spindle-shaped needle crystals of about 1-16μ in length and developed over the plate crystals of Cu.(2) The primary precipitated Cu-particles contributing to the growth of Cu-films were spheroidal, having diameter of 40-150Å.(3) The relations on the coherency found between the plate crystals of Cu and Fe face were as follows:(001)Fe||(001)Cu [110]Fe||[100]Cu}(1) (101)Fe||(101)Cu [010]Fe||[101]Cu}(2) (111)Fe||(111)Cu [121]Fe||[011]Cu}(3)(4) As Fe face having high index was easily ionized in the solution of Cu salt, the face was corroded and some of the faces of {110} Fe, {100} Fe, and {111} Fe remained. Thus, the face remained was substituted by Cu atoms according to one of the relations on coherency.(5) The Cu-films were easily stripped off from the Fe face by means of dipping them in the solution of Cu for 3min. These facts were explained by that Fe atoms combined with Cu atoms were ionized and transferred through the defects of plate crystals of Cu.
社団法人表面技術協会の論文