Composite Coating of Nickel/Tungsten Alloy and Acetylene Black Particle
Composite Coating of Nickel/Tungsten Alloy and Acetylene Black Particle
复制标题
镍/钨合金与乙炔黑粒子复合涂层
DOI：
10.4139/sfj.57.351
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Toshihiro Ohashi
中科院分区：
文献类型：
--
作者：
H. Hayashi;H. Inoue;M. Yoshitake;E. Yanagisawa;Toshihiro Ohashi
本文的目的是通过将乙炔黑颗粒共沉积在具有优异的耐热性和抗氧化性的镍钨合金膜中，形成具有优异的高温自润滑性的镀层。由于乙炔黑颗粒本身具有疏水性，难以分散到镀液中，因此首先通过热氧化在颗粒表面引入酸官能团，结果，在颗粒表面上引入氨基，并且颗粒开始表现出亲水性。当将这些颗粒添加到电镀浴中并进行电沉积时，仅热氧化的颗粒不共沉积，但引入氨基的颗粒在镍钨膜中共沉积，很明显氨基与镍离子在pH= 1.5以上的区域相互作用，通过电位滴定法分析，发现乙炔黑颗粒共沉积的膜层硬度与不含乙炔黑颗粒的膜层相当，表明在不破坏镍钨合金特性的情况下，可以获得在高温下具有优异润滑性的膜层。
The purpose of this paper is forming a plating film excellent in self-lubricity in high temperature by making acetylene black particles codeposit in a nickel tungsten alloy film which shows outstanding heat-resistivity and oxidation-resistivity.Since acetylene black particles as received showed hydrophobicity and it was hard to disperse them into a plating bath, the acid functional group was first introduced on the surface of particles by thermal oxidation, and condensation of the 2-amino ethanol was also carried out.As a result, an amino group was introduced on the surface of particles, and particles came to show hydrophile property.When these particles were added to the plating bath and the electrodeposition was performed, the particles only thermally oxidized did not codeposit, but the particles which introduced the amino group were codeposited in the nickel tungsten film.It became clear that an amino group interacts with nickel ion in the domain beyond pH=4 by the analysis using the potentiometric titration method.The hardness of the film which acetylene black particles codeposited was comparable to a film which does not contain particles, and a possibility of obtaining an outstanding film with lubricity in high temperature was shown, without spoiling the characteristics of the nickel tungsten alloy.