Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride

Hao Liang; Weitong Lin; Qiming Wang; Wei Zhang; Shixue Guan; Jiawei Zhang; Ji-Jung Kai; Duanwei He; Fang Peng

doi:10.1016/j.ceramint.2020.02.048

Author(s)

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

Related Research Unit(s)

Department of Mechanical Engineering

Detail(s)

Original language	English
Pages (from-to)	12788-12794
Journal / Publication	Ceramics International
Volume	46
Issue number	8 (Part B)
Online published	7 Feb 2020
Publication status	Published - 1 Jun 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.ceramint.2020.02.048 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85079148925&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(f82a1b84-5ef1-4689-b815-b1548a6db79c).html

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·m^1/2), 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)

[ RIS ] [ BibTeX ]

Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride. / Liang, Hao; Lin, Weitong; Wang, Qiming et al.

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 › peer-review

Liang, H, Lin, W, Wang, Q, Zhang, W, Guan, S, Zhang, J, Kai, J-J, He, D & Peng, F 2020, 'Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride', Ceramics International, vol. 46, no. 8 (Part B), pp. 12788-12794. https://doi.org/10.1016/j.ceramint.2020.02.048

Liang, H., Lin, W., Wang, Q., Zhang, W., Guan, S., Zhang, J., Kai, J-J., He, D., & Peng, F. (2020). Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride. Ceramics International, 46(8 (Part B)), 12788-12794. https://doi.org/10.1016/j.ceramint.2020.02.048

Liang H, Lin W, Wang Q, Zhang W, Guan S, Zhang J et al. Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride. Ceramics International. 2020 Jun 1;46(8 (Part B)):12788-12794. Epub 2020 Feb 7. doi: 10.1016/j.ceramint.2020.02.048

Liang, Hao ; Lin, Weitong ; Wang, Qiming et al. / Ultrahard and stable nanostructured cubic boron nitride from hexagonal boron nitride. In: Ceramics International. 2020 ; Vol. 46, No. 8 (Part B). pp. 12788-12794.