Abstract
A brief review is given of recently published work on the fracture and plastic flow of natural and synthetic diamond crystals when deformed by softer impressors at elevated temperatures. Under these conditions, a brittle-ductile transition (BDT) temperature for the different types of diamond has been established.
In this paper we show that below the BDT temperature, brittle ‘chatter’ cracking on {111} cleavage planes accounts for anisotropic wear provided that the mean contact pressure exceeds about 10 GPa. Above the BDT temperature, titanium diboride sliders develop contact pressures sufficient to cause extensive plastic deformation of the diamond specimens but insufficient to produce cleavage fracture. However, repeated sliding with TiB2 does lead to cumulative plastic flow preceding fatigue type fracture on {110} planes. Using cubic boron nitride and diamond sliders above the BD T temperature leads to a combination of both plastic deformation and {110} cracking. The coefficient offriction is a maximum in <100> and a minimum in <110> directions. and the measured scratch hardness, which confirms that the <100> directions are softer than <110>, is shown to be consistent with the predictions of a resolved shear stress model which was de velopedffor explaining anisotropy in all crystals.
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References
C.D. Clark, AT. Collins and G.S. Woods, in The Properties of Natural and Synthetic Diamond. J.E. Field, (editor), Academic Press, London (1992), pp35–81.
E.J. Brookes, PhD Thesis, University of Hull, 1992.
A. Al-Watban, unpublished work.
C.A. Brookes, E.J. Brookes and G. Xing, Proceedings of International Colloquium Mechanics of Creep Brittle Materials 2’ (eds: A.C.F. Cocks and A.R.S. Ponter), Elsevier Science Pubs., (1991), 345–355.
E.J. Brookes and C.A. Brookes, Proceedings of International Conference on Plastic Deformation of Ceramics, Snowbird, Utah, (1994).
C.A. Brookes, E.J. Brookes and L.Y. Zhang, Proceedings of 2nd International Conference on the Applications of Diamond Films and Related Materials, Tokyo, August 1993, pp737–744.
C.A. Brookes, E.J. Brookes and L.Y. Zhang, Proceedings of International Conference on Plastic Deformation of Ceramics, Snowbird, Utah, (1994).
C.A. Brookes, R.D. James, F. Nabhani and A. R Parry, Proceedings IMechE Seminar Tribology and Metal Cutting and Grinding, MEP, (1992).
C.A. Brookes, M.P Shaw and P.E. Tanner, Proc Royal Soc, A409, (1987), 141–159.
C.A. Brookes in The Properties of Natural and Synthetic Diamond. J.E. Field, (editor), Academic Press, London (1992).
P. Humble, and R.H.J. Hannink, Nature (London) 273, (1978), 387–39.
M. Tolkowsky, PhD Thesis, University of London, 1920.
C.A. Brookes, International Patent: WO 89/04239 (1989).
C.A. Brookes, and P. Green, Proc. Royal. Soc. Lond., A 368, (1979), 37–57.
J. Wilks and EM. Wilks, in The Properties of Natural and Synthetic Diamond. J.E. Field, (editor), Academic Press, London (1992), pp573–605.
D. Crompton, W. Hirst and M.G.S. Howes, Proc Roy Soc, London A333, 1973, 435–454.
L.G. Tsinzerling, E.S. Berkovich, L.A. Sysoev and M.P. Shackol’skaya, Soviet Physics Cryslallogr, 14, (1970), 897–906.
F.P. Bowden and C.A. Brookes, Proc. Royal. Soc, Lond. A 295, (1966) 244–266.
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Brookes, C.A., Brookes, E.J. & Xing, G. The Effect of Temperature on the Deformation of Diamond Surfaces. MRS Online Proceedings Library 383, 59–71 (1995). https://doi.org/10.1557/PROC-383-59
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DOI: https://doi.org/10.1557/PROC-383-59