Mixed Al//2O//3-HfO//2 powders were prepared by hydrothermal oxidation of the intermetallic compound HfAl//3 and the mixture HfAl//3-4Al at 400 degree to 700 degree C under 100 MPa. Monoclinic HfO//2 with particle sizes of 10-20 nm was finely dispersed among the alpha -Al//2O//3 with sizes ranging from nanometers to micrometers. The temperature-time dependence of the reactions of Al, HfAl//3, and HfAl//3-4Al with H//2O was examined.
|Title of host publication||Advances in Ceramics|
|Editors||Nils Claussen, Manfred Ruehle, Arthur Harold Heuer|
|Publisher||American Ceramic Soc Inc|
|Number of pages||10|
|Publication status||Published - 1984 Dec 1|
|Name||Advances in Ceramics|
All Science Journal Classification (ASJC) codes