Effects of titanium doping on surface properties of alumina
- Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering
Controlled-geometry pore structures were introduced into undoped and Ti-doped sapphire using microfabrication techniques, and subsequently transferred to internal sapphire-sapphire and sapphire-polycrystalline alumina interfaces via hot pressing. The high-temperature evolution of several different types of structures was examined, in order to isolate different surface properties and evolution processes which are of interest during sintering. A study of pore channel breakup showed that Ti strongly stabilizes channels oriented in the sapphire [1{bar 1}00] direction, suggesting a significant alteration of the Wulff plot. In another study, the equilibration rate of isolated pores was enhances in Ti-doped sapphire; as glassy phases are unlikely in this material, a solid-state diffusion mechanism for this enhancement is suggested. The evolution of pore channels with pre-existent perturbations was also studied, and the results of these studies are presented.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 94070
- Report Number(s):
- CONF-941144-; ISBN 1-55899-258-8; TRN: IM9538%%43
- Resource Relation:
- Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of Structure and properties of interfaces in ceramics; Bonnell, D. [ed.] [Univ. of Pennsylvania, PA (United States)]; Ruehle, M. [ed.] [Max-Planck-Institut fuer Metallforschung, Stuttgart (Germany)]; Chowdhry, U. [ed.] [E.I. duPont de Nemours and Co., Inc., Wilmington, DE (United States)]; PB: 481 p.; Materials Research Society symposium proceedings, Volume 357
- Country of Publication:
- United States
- Language:
- English
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