Reactions with high temperature-high pressure water were studied in a closed and open system under conditions of 400 degree -700 degree C, 10-150 MPa and 0-120 h. Titanium hydride (TiH//x), rutile and anatase phases were produced from alpha -titanium. Reactions proceeded above 450 degree C and almost finished at 650 degree C under 100 MPa for 3 h. Titanium was changed into rutile, anatase and titanium hydride at 500 degree C under 100 MPa for 8 h, then anatase and titanium hydride were changed into rutile beyond 120 h. The pressure had little effect in these reactions. Crystal growth of rutile was observed in the open system where high temperature-high pressure water acted as a solvent. The crystallite size increased for about 3 h but stopped at about 65 nm in the closed system, shile it gradually increased to about 85 nm in the open system at 500 degree C under 100 MPa for 120 h.
|頁（從 - 到）||357-363|
|期刊||Yogyo Kyokai Shi/Journal of the Ceramic Society of Japan|
|出版狀態||Published - 1985 一月 1|
All Science Journal Classification (ASJC) codes
- 工程 (全部)