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The Erosive Behaviour of Diamond

Published online by Cambridge University Press:  15 February 2011

C S James Pickles ,
E J Coad ,
G H Jilbert  and
J E Field
C S James Pickles
Affiliation:
PCS Group, Cavendish Laboratory, Cambridge University, CB3 OHE, UK
E J Coad
Affiliation:
PCS Group, Cavendish Laboratory, Cambridge University, CB3 OHE, UK
G H Jilbert
Affiliation:
PCS Group, Cavendish Laboratory, Cambridge University, CB3 OHE, UK
J E Field
Affiliation:
PCS Group, Cavendish Laboratory, Cambridge University, CB3 OHE, UK
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Abstract

Diamond exists in many forms including natural diamond, synthetic diamond produced at high temperatures and pressures, polycrystalline diamond composites (PCD's) and most recently chemical vapour deposited (CVD) diamond. The liquid impact behaviour of these materials has been characterised in terms of a single and multiple impact damage threshold velocity which was obtained using a jet technique capable of reaching velocities of 600 m s−1. The multiple impact damage threshold velocity is a highly reproducible parameter which is invaluable in comparing the rain erosion resistances of different materials.

The sand erosion resistances of the various forms of diamond have also been evaluated using a specially designed sand blasting apparatus at velocities up to 270 m s-1. The extent of damage is quantified by mass and transmission loss as a function of impact velocity.

The results of these experiments reveal that the exceptional mechanical properties of diamond cause it to have an equally exceptional response to erosion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 383: Symposium I – Mechanical Behavior of Diamond and Other Forms of Carbon , 1995 , 327
Copyright
Copyright © Materials Research Society 1995

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