Boron suboxide materials with Co sintering additives

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

Research output: Contribution to journalArticle

25 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 m1/2) and still high hardness (HV5 = 28.6 GPa.).

Original languageEnglish
Pages (from-to)1767-1771
Number of pages5
JournalCeramics International
Volume36
Issue number6
DOIs
Publication statusPublished - Aug 1 2010

Fingerprint

Boron
Fracture toughness
Sintering
Densification
Boron Compounds
Polycrystalline materials
Borides
Hot pressing
Powders
Oxides
Transition metals
Metals
Hardness
Liquids
Industry

All Science Journal Classification (ASJC) codes

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

Cite this

Johnson, O. T., Sigalas, I., Ogunmuyiwa, E. N., Kleebe, H. J., Müller, M. M., & Herrmann, M. (2010). Boron suboxide materials with Co sintering additives. Ceramics International, 36(6), 1767-1771. https://doi.org/10.1016/j.ceramint.2010.02.035
Johnson, O. T. ; Sigalas, I. ; Ogunmuyiwa, E. N. ; Kleebe, H. J. ; Müller, M. M. ; Herrmann, M. / Boron suboxide materials with Co sintering additives. In: Ceramics International. 2010 ; Vol. 36, No. 6. pp. 1767-1771.
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Johnson, OT, Sigalas, I, Ogunmuyiwa, EN, Kleebe, HJ, Müller, MM & Herrmann, M 2010, 'Boron suboxide materials with Co sintering additives', Ceramics International, vol. 36, no. 6, pp. 1767-1771. https://doi.org/10.1016/j.ceramint.2010.02.035

Boron suboxide materials with Co sintering additives. / Johnson, O. T.; Sigalas, I.; Ogunmuyiwa, E. N.; Kleebe, H. J.; Müller, M. M.; Herrmann, M.

In: Ceramics International, Vol. 36, No. 6, 01.08.2010, p. 1767-1771.

Research output: Contribution to journalArticle

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Johnson OT, Sigalas I, Ogunmuyiwa EN, Kleebe HJ, Müller MM, Herrmann M. Boron suboxide materials with Co sintering additives. Ceramics International. 2010 Aug 1;36(6):1767-1771. https://doi.org/10.1016/j.ceramint.2010.02.035