Influence of crystallographic orientation, chemical inhomogeneities, material transport anisotropy and elastic strain energy on the migration of grain boundaries in chromium-doped alumina during internal reduction

Conference · Fri Sep 01 00:00:00 EDT 1995

OSTI ID:94067

Backhaus-Ricoult, M; Peyrot-Chabrol, A; Hagege, S ^[1]; Chiron, R ^[2]

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1. CNRS, Vitry (France). Centre d`Etudes de Chimie Metallurgique
2. CNRS, Villetaneuse (France)

Diffusion-induced grain boundary migration is observed during internal reduction of chromium-doped alumina. It occurs because grain boundary diffusion is fast compared to lattice diffusion of oxygen. The oxygen chemical potential relaxes between grain boundaries and adjacent grains. Migration to either side of the boundary plane or by more rapid oxygen relaxation when the c-axis of a grain is perpendicular to the boundary plane.

• OSTI ID: 94067
• Report Number(s): CONF-941144-; ISBN 1-55899-258-8; TRN: IM9538%%40
• 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

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
REDUCTION
GRAIN BOUNDARIES
CHROMIUM OXIDES
SAMPLE PREPARATION
MONOCRYSTALS
POLYCRYSTALS
BICRYSTALS
DIFFUSION
CHEMICAL COMPOSITION
STRAINS
OPTICAL MICROSCOPY
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
PRECIPITATION