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.
COPYRIGHT: (C)2008,JPO&INPIT
Tadamasa Fujimura
Mitsuji Otagawa
Shuji Yamamoto
Shigeru Shiozaki
Sankei Giken Co., Ltd.
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| JP2004018909A | ||||
| JP2006225730A |