期刊
SCRIPTA MATERIALIA
卷 57, 期 4, 页码 361-364出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.04.027
关键词
anisotropy; hardness; elastic behavior; toughness; slip
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. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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