Suppression of hydrogen absorption to V-4Cr-4Ti alloy by TiO/TiC coating

Hirohata, Yuko*; Motojima, Dai*; Hino, Tomoaki*; Sengoku, Seio

Titanium oxide film was coated on entire surface of a V-4Cr-4Ti alloy to reduce hydrogen absorption at low temperature region. The film consisted with a mixture of TiO2 and TiC. The content of TiO was approximately 80%. The hydrogen absorption rate of Ti-oxide coated V-alloy largely decreased with increase of the film thickness. In the case of the film with a thickness of 0.5 micron, the absorption rate was fifty times smaller than that of non-coated V-alloy at the absorption temperature of 573 K.