2005
DOI: 10.1111/j.1551-2916.2005.00559.x
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Investigation of Anelastic Creep Recovery in SiC Whisker‐Reinforced Alumina Composites

Abstract: Anelastic strain recovery has been studied in SiC whisker‐reinforced alumina composites following tensile creep. The magnitude of the recovered strains were ∼10−3 with 20 vol% SiC whiskers upon unloading from 74 MPa at 1673 K, while no such behavior was observed with 10 vol% SiC whiskers. A strain recovery mechanism based on Hertzian contact deformation within a percolating whisker (or particle) network is suggested, which appears to be consistent with the experimental observations. Two models (for whiskers an… Show more

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Cited by 3 publications
(2 citation statements)
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“…As alumina with a lower content of reinforcing elements did not show any significant recovery effect, it seems that a critical volume fraction is required to form an interconnecting whisker network. 7 Large amount of elastic energy can indeed be stored between whiskers due to Hertz contact. On the other hand, large time-dependent strain recovery has been observed by Todd 8 on superplastic metallic alloys.…”
Section: Introductionmentioning
confidence: 99%
“…As alumina with a lower content of reinforcing elements did not show any significant recovery effect, it seems that a critical volume fraction is required to form an interconnecting whisker network. 7 Large amount of elastic energy can indeed be stored between whiskers due to Hertz contact. On the other hand, large time-dependent strain recovery has been observed by Todd 8 on superplastic metallic alloys.…”
Section: Introductionmentioning
confidence: 99%
“…The formation of a continuous percolated network of SiC whiskers across a sample has important implications for electrical/thermal transport and mechanical properties (de Arellano-Lopez et al, 1998Holm & Cima, 1989;Mebane & Gerhardt, 2004Quan et al, 2005). For hot-pressed ceramic composites, it seems that percolation tends to occur in the 7 to 10 vol% range.…”
Section: Percolation Of Sic Whiskersmentioning
confidence: 99%