Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride

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

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Author(s)

  • Hao Liang
  • Qiming Wang
  • Wei Zhang
  • Shixue Guan
  • Jiawei Zhang
  • Duanwei He
  • Fang Peng

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)12788-12794
Journal / PublicationCeramics International
Volume46
Issue number8 (Part B)
Online published7 Feb 2020
Publication statusPublished - 1 Jun 2020

Abstract

Cubic boron nitride (cBN), a typical superhard material, has garnered significant interest for both fundamental scientific research and technical applications. Here, nanostructured cBN with high-density nanotwins and stacking faults was synthesized by rapid quenching using hexagonal boron nitride (hBN) as the starting material at a moderate temperature (2200 K) and low pressure (13 GPa). This synthetic nanostructured cBN exhibits high Vickers hardness (78 GPa), high fracture toughness (11.8 MPa·m1/2), and extremely high oxidization temperature (1565 K). We propose that the refined grain structure and excellent mechanical properties of the cBN synthesized in this study is attributed mainly to dislocation slips and (111) mechanical nanotwins that dominate this phase transformation.

Research Area(s)

  • Cubic boron nitride, Dense defects, Mechanical behavior, Nanostructured, Stability

Citation Format(s)

Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride. / Liang, Hao; Lin, Weitong; Wang, Qiming; Zhang, Wei; Guan, Shixue; Zhang, Jiawei; Kai, Ji-Jung; He, Duanwei; Peng, Fang.

In: Ceramics International, Vol. 46, No. 8 (Part B), 01.06.2020, p. 12788-12794.

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