Boron suboxide materials with Co sintering additives

O. T. Johnson; I. Sigalas; E. N. Ogunmuyiwa; H. J. Kleebe; M. M. Müller; M. Herrmann

doi:10.1016/j.ceramint.2010.02.035

Boron suboxide materials with Co sintering additives

O. T. Johnson, I. Sigalas, E. N. Ogunmuyiwa, H. J. Kleebe, M. M. Müller, M. Herrmann

Chemical, Materials & Metallurgical Engineering

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

26 Citations (Scopus)

Abstract

Difficulties in the densification as well as the low fracture toughness of the resulting polycrystalline materials have delayed the application of boron suboxide as a superhard material in industry. In this work, efforts have been made to improve the fracture toughness and densification of these materials by incorporating suitable secondary phases. Possible candidates are transition metals, which form under sintering conditions a liquid phase. Therefore different Co containing additives (metal, oxide and boride) were used to densify boron suboxide powder by hot pressing. The resulting materials have a significantly improved fracture toughness (3.9 MPa m^1/2) and still high hardness (H_V5 = 28.6 GPa.).

Original language	English
Pages (from-to)	1767-1771
Number of pages	5
Journal	Ceramics International
Volume	36
Issue number	6
DOIs	https://doi.org/10.1016/j.ceramint.2010.02.035
Publication status	Published - Aug 2010

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2010.02.035

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title = "Boron suboxide materials with Co sintering additives",

abstract = "Difficulties in the densification as well as the low fracture toughness of the resulting polycrystalline materials have delayed the application of boron suboxide as a superhard material in industry. In this work, efforts have been made to improve the fracture toughness and densification of these materials by incorporating suitable secondary phases. Possible candidates are transition metals, which form under sintering conditions a liquid phase. Therefore different Co containing additives (metal, oxide and boride) were used to densify boron suboxide powder by hot pressing. The resulting materials have a significantly improved fracture toughness (3.9 MPa m1/2) and still high hardness (HV5 = 28.6 GPa.).",

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AU - Johnson, O. T.

AU - Sigalas, I.

AU - Ogunmuyiwa, E. N.

AU - Kleebe, H. J.

AU - Müller, M. M.

AU - Herrmann, M.

PY - 2010/8

Y1 - 2010/8

N2 - Difficulties in the densification as well as the low fracture toughness of the resulting polycrystalline materials have delayed the application of boron suboxide as a superhard material in industry. In this work, efforts have been made to improve the fracture toughness and densification of these materials by incorporating suitable secondary phases. Possible candidates are transition metals, which form under sintering conditions a liquid phase. Therefore different Co containing additives (metal, oxide and boride) were used to densify boron suboxide powder by hot pressing. The resulting materials have a significantly improved fracture toughness (3.9 MPa m1/2) and still high hardness (HV5 = 28.6 GPa.).

AB - Difficulties in the densification as well as the low fracture toughness of the resulting polycrystalline materials have delayed the application of boron suboxide as a superhard material in industry. In this work, efforts have been made to improve the fracture toughness and densification of these materials by incorporating suitable secondary phases. Possible candidates are transition metals, which form under sintering conditions a liquid phase. Therefore different Co containing additives (metal, oxide and boride) were used to densify boron suboxide powder by hot pressing. The resulting materials have a significantly improved fracture toughness (3.9 MPa m1/2) and still high hardness (HV5 = 28.6 GPa.).

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Boron suboxide materials with Co sintering additives

Abstract

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