Microstructure and tribological properties of cubic boron nitride films on Si3N4 inserts via boron-doped diamond buffer layers

F. Xu; M. F. Yuen; B. He; C. D. Wang; X. R. Zhao; X. L. Tang; D. W. Zuo; W. J. Zhang

doi:10.1016/j.diamond.2014.07.014

Author(s)

F. Xu
M. F. Yuen
B. He
C. D. Wang
X. R. Zhao
X. L. Tang
D. W. Zuo

Related Research Unit(s)

Centre of Super-Diamond and Advanced Films

Detail(s)

Original language	English
Pages (from-to)	9-13
Journal / Publication	Diamond and Related Materials
Volume	49
Publication status	Published - Oct 2014

Link(s)

DOI	DOI https://doi.org/10.1016/j.diamond.2014.07.014 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84906492031&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(ce7a830d-f674-4e9c-82f0-333c450f68e2).html

Abstract

Cubic boron nitride (cBN) coatings were deposited on silicon nitride (Si₃N₄) cutting inserts through conductive boron-doped diamond (BDD) buffer layers in an electron cyclotron resonance microwave plasma chemical vapor deposition (ECR MPCVD) system. The adhesion and crystallinity of cBN coatings were systematically characterized, and the influence of doping level of BDD on the phase composition and microstructure of the cBN coatings were studied. The nano-indentation tests showed that the hardness and elastic modulus of the obtained cBN coatings were 78 GPa and 732 GPa, respectively. The tribological properties of the cBN coatings were evaluated by using a ball-on-disc tribometer with Si₃N₄ as the counterpart. The coefficient of the friction and the wear rate of the cBN coatings were estimated to be about 0.17 and 4.1 × 10^{- 7} mm³/N m, respectively, which are remarkably lower than those of titanium aluminum nitride (TiAlN) coatings widely used in machining ferrous metal. The results suggest that cBN/BDD coated Si₃N₄ inserts may have great potentials for advanced materials machining. © 2014 Elsevier B.V. All rights reserved.

Research Area(s)

Boron doped diamond, Cubic boron nitride film, Silicon nitride insert, Tribological properties

Citation Format(s)

[ RIS ] [ BibTeX ]

Microstructure and tribological properties of cubic boron nitride films on Si3N4 inserts via boron-doped diamond buffer layers. / Xu, F.; Yuen, M. F.; He, B. et al.
In: Diamond and Related Materials, Vol. 49, 10.2014, p. 9-13.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Xu, F, Yuen, MF, He, B, Wang, CD, Zhao, XR, Tang, XL, Zuo, DW & Zhang, WJ 2014, 'Microstructure and tribological properties of cubic boron nitride films on Si3N4 inserts via boron-doped diamond buffer layers', Diamond and Related Materials, vol. 49, pp. 9-13. https://doi.org/10.1016/j.diamond.2014.07.014

Xu, F., Yuen, M. F., He, B., Wang, C. D., Zhao, X. R., Tang, X. L., Zuo, D. W., & Zhang, W. J. (2014). Microstructure and tribological properties of cubic boron nitride films on Si3N4 inserts via boron-doped diamond buffer layers. Diamond and Related Materials, 49, 9-13. https://doi.org/10.1016/j.diamond.2014.07.014

Xu F, Yuen MF, He B, Wang CD, Zhao XR, Tang XL et al. Microstructure and tribological properties of cubic boron nitride films on Si3N4 inserts via boron-doped diamond buffer layers. Diamond and Related Materials. 2014 Oct;49:9-13. doi: 10.1016/j.diamond.2014.07.014

Xu, F. ; Yuen, M. F. ; He, B. et al. / Microstructure and tribological properties of cubic boron nitride films on Si3N4 inserts via boron-doped diamond buffer layers. In: Diamond and Related Materials. 2014 ; Vol. 49. pp. 9-13.