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High‐Temperature Deformation of Polycrystalline Fe 2 O 3
Author(s) -
CROUCH A. G.
Publication year - 1972
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1972.tb13436.x
Subject(s) - materials science , crystallite , porosity , creep , deformation (meteorology) , diffusion , atmospheric temperature range , stress (linguistics) , composite material , grain size , thermodynamics , oxygen , compression (physics) , mineralogy , metallurgy , chemistry , physics , linguistics , philosophy , organic chemistry
The effects of stress, temperature, grain size, porosity, and O 2 partial pressure on the creep of polycrystalline Fe 2 O 3 were studied in the range 770° to 1105°C by tests in 4‐point bending and compression. Deformation rates are controlled by the stress‐directed diffusion of either oxygen or iron. Diffusion coefficients computed from the Nabarro‐Herring formula modified by including an empirical porosity‐correction term are also consistent with the values reported for oxygen and iron.