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Scripta Materialia
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arXiv.org e-Print Archive
Preprint . 2012
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Scripta Materialia
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Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Aug 2012Embargo end date: 01 Jan 2012 English Publisher:Elsevier BVJournal:Scripta Materialia, volume 67, pages 257-260 (issn: 1359-6462, Copyright policy )
Authors: Qin, Jiaqian; Nishiyama, Norimasa; Ohfuji, Hiroaki; Shinmei, Toru; Lei, Li; He, Duanwei; Irifune, Tetsuo;

doi: 10.1016/j.scriptamat.2012.04.032 , 10.48550/arxiv.1203.1748

arXiv: 1203.1748

Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride

Abstract

The Vickers hardness of polycrystalline ��-B was measured using a diamond indentation method. The elastic properties of polycrystalline ��-B (B=213.9 GPa, G=227.2 GPa, and E=503.3 GPa) were determined using ultrasonic measurement at ambient condition. Under the loading force up to 20 N, our test gave an average Vickers hardness in the asymptotic-hardness region of 30.3 GPa. The average fracture toughness was measured as 4.1MPa m1/2. Additionally, We also measured the hardness and elastic properties of polycrystalline ��-B and PcBN for comparison. The hardness and elastic properties for polycrystalline ��-B was found to be very close to that of PcBN. Our results suggest that the polycrystalline ��-B could be a superhard polycrystalline material for industrial applications.

16 pages

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Keywords

Condensed Matter - Materials Science, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences

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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
22
Top 10%
Top 10%
Top 10%
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