Nanocrystalline C-BN synthesized by mechanical alloying

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Y. F. Zhang
  • Y. H. Tang
  • C. S. Lee
  • I. Bello
  • S. T. Lee

Detail(s)

Original languageEnglish
Pages (from-to)610-613
Journal / PublicationDiamond and Related Materials
Volume8
Issue number2-5
Publication statusPublished - Mar 1999

Abstract

Nanocrystalline carbon-boron nitride (C-BN) compounds have been synthesized by solid phase mechanical alloying of Cx(BN)1-x powder with various carbon fractions x. Ternary mixing within the structures was found to occur after ball milling and hot-pressing. High temperature recrystallization led to a change in structural configuration, specifically, into alternating layers of graphite and BN. The hardness of the C-BN plates increased when the carbon fraction x increased from 0 to 0.5, and then decreased when x increased thereafter. The composite C0.5(BN)0.5 possessed the highest hardness equalling twice that of nanocrystalline graphite and three times that of nanocrystalline BN. The lattice parameters c and a were larger and smaller, respectively, than those of graphite and hBN. The property differences between the initial and resultant materials were attributed to the structural transformation of the original substances into heterogeneously layered Cx(BN)1-x compounds. New additional peaks were also observed and matched those of shock-wave compressed BN.

Research Area(s)

  • BN phase, Bonding, Carbide, Hardness

Citation Format(s)

Nanocrystalline C-BN synthesized by mechanical alloying. / Zhang, Y. F.; Tang, Y. H.; Lee, C. S. et al.
In: Diamond and Related Materials, Vol. 8, No. 2-5, 03.1999, p. 610-613.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review