Boron suboxide: As hard as cubic boron nitride

Duanwei He; Yusheng Zhao; L. Daemen; J. Qian; T. D. Shen; T. W. Zerda

doi:10.1063/1.1494860

Boron suboxide: As hard as cubic boron nitride

Duanwei He
, Yusheng Zhao
, L. Daemen
, J. Qian
, T. D. Shen
, T. W. Zerda

Research output: Contribution to journal › Article › peer-review

274 Scopus citations

Abstract

The Vickers hardness of boron suboxide single crystals was measured using a diamond indentation method. Under a loading force of 0.98 N, our test gave an average Vickers hardness of 45 GPa. The average fracture toughness was measured as 4.5MPam^1/2. We also measured the hardness of the cubic boron nitride and sapphire single crystals for comparison. The average measured hardness for boron suboxide was found to be very close to that of cubic boron nitride under the same loading force. Our results suggest that the boron suboxide could be a new superhard material for industrial applications, surpassed in hardness only by diamond and cubic boron nitride.

Original language	English
Pages (from-to)	643-645
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	4
DOIs	https://doi.org/10.1063/1.1494860
State	Published - Jul 22 2002
Externally published	Yes

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title = "Boron suboxide: As hard as cubic boron nitride",

abstract = "The Vickers hardness of boron suboxide single crystals was measured using a diamond indentation method. Under a loading force of 0.98 N, our test gave an average Vickers hardness of 45 GPa. The average fracture toughness was measured as 4.5MPam1/2. We also measured the hardness of the cubic boron nitride and sapphire single crystals for comparison. The average measured hardness for boron suboxide was found to be very close to that of cubic boron nitride under the same loading force. Our results suggest that the boron suboxide could be a new superhard material for industrial applications, surpassed in hardness only by diamond and cubic boron nitride.",

author = "Duanwei He and Yusheng Zhao and L. Daemen and J. Qian and Shen, \{T. D.\} and Zerda, \{T. W.\}",

year = "2002",

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doi = "10.1063/1.1494860",

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T1 - Boron suboxide

T2 - As hard as cubic boron nitride

AU - He, Duanwei

AU - Zhao, Yusheng

AU - Daemen, L.

AU - Qian, J.

AU - Shen, T. D.

AU - Zerda, T. W.

PY - 2002/7/22

Y1 - 2002/7/22

N2 - The Vickers hardness of boron suboxide single crystals was measured using a diamond indentation method. Under a loading force of 0.98 N, our test gave an average Vickers hardness of 45 GPa. The average fracture toughness was measured as 4.5MPam1/2. We also measured the hardness of the cubic boron nitride and sapphire single crystals for comparison. The average measured hardness for boron suboxide was found to be very close to that of cubic boron nitride under the same loading force. Our results suggest that the boron suboxide could be a new superhard material for industrial applications, surpassed in hardness only by diamond and cubic boron nitride.

AB - The Vickers hardness of boron suboxide single crystals was measured using a diamond indentation method. Under a loading force of 0.98 N, our test gave an average Vickers hardness of 45 GPa. The average fracture toughness was measured as 4.5MPam1/2. We also measured the hardness of the cubic boron nitride and sapphire single crystals for comparison. The average measured hardness for boron suboxide was found to be very close to that of cubic boron nitride under the same loading force. Our results suggest that the boron suboxide could be a new superhard material for industrial applications, surpassed in hardness only by diamond and cubic boron nitride.

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U2 - 10.1063/1.1494860

DO - 10.1063/1.1494860

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SN - 0003-6951

VL - 81

SP - 643

EP - 645

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

ER -

Boron suboxide: As hard as cubic boron nitride

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