Effect of Crack-Interface Bridging on Subcritical Crack Growth in Ferrites

A transition between transgranular fracture and intergranular fracture in polycrystalline manganese zinc ferrites has been investigated by measuring subcritical crack growth in double‐cantilever‐beam specimens. Log velocity vs K1 plots are like those for other ceramic materials with three well‐defin...

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Published in:Journal of the American Ceramic Society 1989-07, Vol.72 (7), p.1179-1184
Main Authors: Beauchamp, Edwin K., Monroe, S. L.
Format: Article
Language:English
Subjects:
Applied sciences
bridging
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
cracks
Exact sciences and technology
ferrites
fracture
mechanical properties
Technical ceramics
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cited_by cdi_FETCH-LOGICAL-c4839-41c701735e9626bca6afbedf7fe30e576fbbb6783d6b7eb04b852430cfdfdb843
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container_title Journal of the American Ceramic Society
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creator Beauchamp, Edwin K.
Monroe, S. L.
description A transition between transgranular fracture and intergranular fracture in polycrystalline manganese zinc ferrites has been investigated by measuring subcritical crack growth in double‐cantilever‐beam specimens. Log velocity vs K1 plots are like those for other ceramic materials with three well‐defined regions of growth. Unlike other ceramics, however, the K1 values at which crack growth became critical showed large variations with relative humidity. Crack velocities depended on prior history and, at K1 > 1.1 MPa · m1/2 in dry N2, crack growth was intermittent. All of these features were related to an increase in intergranular fracture with K1. A model is presented to explain the data in terms of the generation ad removal of crack‐interface bridges which were produced by intergranular fracture.
doi_str_mv 10.1111/j.1151-2916.1989.tb09705.x
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source Wiley-Blackwell Materials Science Backfiles
subjects Applied sciences
bridging
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
cracks
Exact sciences and technology
ferrites
fracture
mechanical properties
Technical ceramics
title Effect of Crack-Interface Bridging on Subcritical Crack Growth in Ferrites
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