Journal
SCRIPTA MATERIALIA
Volume 67, Issue 3, Pages 257-260Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2012.04.032
Keywords
Polycrystalline boron; Elastic modulus; Hardness; Fracture toughness
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Funding
- JSPS [22 00029]
- G-COE Program
- Grants-in-Aid for Scientific Research [20001005] Funding Source: KAKEN
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The Vickers hardness of polycrystalline gamma-boron (gamma-B) was measured using a diamond indentation method. The elastic properties of polycrystalline gamma-B were determined using an ultrasonic measurement method. Under a loading force of up to 20 N our test gave an average Vickers hardness in the asymptotic hardness region around 30.3 GPa. We also measured the hardness and elastic properties of polycrystalline beta-B and cubic boron nitride Ti3SiC2 (PcBN) for comparison. The hardness and elastic properties of polycrystalline gamma-B were found to be very close to those of PcBN. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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