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

Jiaqian Qin; Norimasa Nishiyama; Hiroaki Ohfuji; Toru Shinmei; Li Lei; Duanwei He; Tetsuo Irifune

doi:10.1016/j.scriptamat.2012.04.032

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

Jiaqian Qin, Norimasa Nishiyama, Hiroaki Ohfuji, Toru Shinmei, Li Lei, Duanwei He, Tetsuo Irifune

研究成果: Article › 査読

17 被引用数 (Scopus)

抄録

The Vickers hardness of polycrystalline γ-boron (γ-B) was measured using a diamond indentation method. The elastic properties of polycrystalline γ-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 β-B and cubic boron nitride-Ti ₃SiC ₂ (PcBN) for comparison. The hardness and elastic properties of polycrystalline γ-B were found to be very close to those of PcBN.

本文言語	English
ページ（範囲）	257-260
ページ数	4
ジャーナル	Scripta Materialia
巻	67
号	3
DOI	https://doi.org/10.1016/j.scriptamat.2012.04.032
出版ステータス	Published - 2012 8月
外部発表	はい

ASJC Scopus subject areas

材料科学（全般）
凝縮系物理学
材料力学
機械工学
金属および合金

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10.1016/j.scriptamat.2012.04.032

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引用スタイル

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title = "Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride",

abstract = "The Vickers hardness of polycrystalline γ-boron (γ-B) was measured using a diamond indentation method. The elastic properties of polycrystalline γ-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 β-B and cubic boron nitride-Ti 3SiC 2 (PcBN) for comparison. The hardness and elastic properties of polycrystalline γ-B were found to be very close to those of PcBN.",

keywords = "Elastic modulus, Fracture toughness, Hardness, Polycrystalline boron",

author = "Jiaqian Qin and Norimasa Nishiyama and Hiroaki Ohfuji and Toru Shinmei and Li Lei and Duanwei He and Tetsuo Irifune",

note = "Funding Information: This work was supported by JSPS Grants-in Aid for Scientific Research under grant no. 22 00029 and the G-COE Program. J.Q. would like to thank Regshi Ryo and Yongtao Zou for help with the experiments. ",

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T2 - As hard as polycrystalline cubic boron nitride

AU - Qin, Jiaqian

AU - Nishiyama, Norimasa

AU - Ohfuji, Hiroaki

AU - Shinmei, Toru

AU - Lei, Li

AU - He, Duanwei

AU - Irifune, Tetsuo

N1 - Funding Information: This work was supported by JSPS Grants-in Aid for Scientific Research under grant no. 22 00029 and the G-COE Program. J.Q. would like to thank Regshi Ryo and Yongtao Zou for help with the experiments.

PY - 2012/8

Y1 - 2012/8

N2 - The Vickers hardness of polycrystalline γ-boron (γ-B) was measured using a diamond indentation method. The elastic properties of polycrystalline γ-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 β-B and cubic boron nitride-Ti 3SiC 2 (PcBN) for comparison. The hardness and elastic properties of polycrystalline γ-B were found to be very close to those of PcBN.

AB - The Vickers hardness of polycrystalline γ-boron (γ-B) was measured using a diamond indentation method. The elastic properties of polycrystalline γ-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 β-B and cubic boron nitride-Ti 3SiC 2 (PcBN) for comparison. The hardness and elastic properties of polycrystalline γ-B were found to be very close to those of PcBN.

KW - Elastic modulus

KW - Fracture toughness

KW - Hardness

KW - Polycrystalline boron

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

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