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Mechanical properties and anisotropy in hydroxyapatite single crystals

Viswanath, B and Raghavan, R and Ramamurty, U and Ravishankar, N (2007) Mechanical properties and anisotropy in hydroxyapatite single crystals. In: Scripta Materialia, 57 (4). pp. 361-364.

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The mechanical behavior of single crystalline hydroxyapatite is examined through instrumented nano- and microindentation experiments on prism and basal planes. The results indicate that the c-axis orientation is stiff and hard, and significant anisotropy in properties was found. Nanoscale plasticity is observed in the form of pile-up along the nanoindentation edges and manifests as discrete displacement bursts in the load vs. depth of penetration curves. Toughness also shows significant anisotropy and is lower compared with the values reported for the polycrystalline hydroxyapatite.

Item Type: Journal Article
Publication: Scripta Materialia
Publisher: Elsevier Ltd.
Additional Information: Copyright of this article belongs to Acta Materialia Inc.
Keywords: Anisotropy;Hardness;Elastic behavior;Toughness;Slip
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 07 Nov 2007
Last Modified: 19 Sep 2010 04:39
URI: http://eprints.iisc.ac.in/id/eprint/11878

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