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Mechanical properties of tricalcium phosphate single crystals grown by molten salt synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
1577 86 2008 7 PDF Available
Title
Mechanical properties of tricalcium phosphate single crystals grown by molten salt synthesis
Abstract

Mechanical properties of flux-grown tricalcium phosphate (TCP) single crystals ranging in size from 50 to 75 μm have been characterized by performing micro- and nanoindentation on their facets. Notwithstanding the inherent brittleness and anisotropy, these single crystals exhibit nanoscale plasticity in the form of pile-up around the edges of indents. A similar plastic response was observed in hydroxyapatite (HA) single crystals during nanoindentation in an earlier study. The hardness and elastic modulus obtained during nanoindentation are discussed in comparison with the polycrystalline forms of both TCP and HA found in the literature. The indentation fracture toughness values of TCP single crystals were found to be higher than those of HA single crystals. The higher values are attributed not only to the difference in crystal structure and corresponding differences in surface energy, but also to extensive crack bridging by ligament formation across crack faces during crack propagation.

Keywords
Single crystals; Tricalcium phosphate; Plasticity; Crack bridging; Nanoindentation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 4, Issue 5, September 2008, Pages 1448–1454
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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