To provide a nanodiamond particulate-metal coprecipitated film in which nanodiamond particulates are dispersed onto crystal grain boundaries in a thin film layer, and having excellent hydrogen embrittlement resistance and corrosion resistance, and further, to provide an improved method for producing a nanodiamond particulate-metal coprecipitated film having excellent hydrogen embrittlement resistance and corrosion resistance by a plating method using an electroplating bath.
Disclosed is a thin film layer of a noble metal in which nanodiamond particles are dispersed into a layer (hereinafter, simply referred to as a noble metal-compounded thin film layer). In the nanodiamond particles, the numerical average abundance of the diamond particles with the particle diameter of 100 nm is substantially 0%, the numerical average abundance of the diamond particles with the particle diameter of 2 nm is substantially 0%, and they are precipitated on the crystal grain boundaries of the noble metal thin film layer. The nanodiamond particles are comprised in the noble metal-compounded thin film layer by 0.01 to 6 wt.%, and, in a corrosion test with 5% hydrogen fluoride, the noble metal thin film layer is not corroded for 100 hr.
FUJIMURA TADAMASA
OTAGAWA MITSUSHI
YAMAMOTO SHUJI
SHIOZAKI SHIGERU
SANKEI GIKEN KOGYO CO LTD
| JPH04333599A | 1992-11-20 | |||
| JP2004018909A | 2004-01-22 | |||
| JP2006225730A | 2006-08-31 |