Fracture of synthetic diamond

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)3083-3088
Journal / PublicationJournal of Applied Physics
Volume78
Issue number5
Publication statusPublished - 1 Sept 1995
Externally publishedYes

Abstract

The fracture behavior of synthetic diamond has been investigated using indentation methods and by the tensile testing of pre-notched fracture-mechanics type samples. Specifically, the fracture toughness of free-standing diamond plates, grown by chemically-vapor deposited (CVD) methods, was measured using Vickers indentations and by the use of disk-shaped compact-tension specimens; the latter method provides an evaluation of the through-thickness fracture properties, whereas the indentation method was performed on the nucleation surface of the sample. Measured fracture toughness (Kc) values were found to be approximately 5-6 MPa√m by both methods, indicating that the fracture resistance of CVD diamond does not vary appreciably with grain size (within the certainty of the testing procedures). Complications, however, arose with the fracture-mechanics testing regarding crack initiation from a relatively blunt notch; further work is needed to develop pre-cracking methods to permit more reliable fracture toughness testing of diamond. © 1995 American Institute of Physics.

Citation Format(s)

Fracture of synthetic diamond. / Drory, M. D.; Dauskardt, R. H.; Kant, A. et al.
In: Journal of Applied Physics, Vol. 78, No. 5, 01.09.1995, p. 3083-3088.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review