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Growth and erosive wear performance of diamond coatings on WC substrates

Growth and erosive wear performance of diamond coatings on WC substrates
Growth and erosive wear performance of diamond coatings on WC substrates
Adherent diamond coatings up to ~30 ?m thick have been grown by microwave plasma CVD on WC substrates and their erosive wear properties investigated under high velocity air–sand erosion testing. Coating properties, particularly residual stress and adhesion, are sensitive functions of surface pre-treatment and deposition procedures. Adherent coatings offer significantly better erosion resistance compared to uncoated substrates, with the erosion rate being lower by up to a factor of ~5 based on the results obtained to date. Also films with low residual stress appear to exhibit longer lifetimes under testing. Failure tends to occur catastrophically along the coating–substrate interface. The grain boundaries do not appear to represent an easy route for crack propagation. Their strength appears to be comparable to that of the grains themselves.
diamond coatings, erosive wear, tungsten carbide
0925-9635
845-849
Amirhaghi, S.
404b6386-56fd-4e3f-8c5d-2e3460066a4c
Reehal, H.S.
6dcb323f-0428-4ca2-ae07-7de517a73c2d
Plappert, E.
925dbdf4-8652-425b-9bcc-9a7852330e33
Bajic, Z.
57af91b4-68c4-4d90-8499-e4443d92b713
Wood, R.J.K.
8824ab38-4508-41d1-a5bb-2fe37931424a
Wheeler, D.W.
d276c145-56e0-48d0-ae37-a84dda92a947
Amirhaghi, S.
404b6386-56fd-4e3f-8c5d-2e3460066a4c
Reehal, H.S.
6dcb323f-0428-4ca2-ae07-7de517a73c2d
Plappert, E.
925dbdf4-8652-425b-9bcc-9a7852330e33
Bajic, Z.
57af91b4-68c4-4d90-8499-e4443d92b713
Wood, R.J.K.
8824ab38-4508-41d1-a5bb-2fe37931424a
Wheeler, D.W.
d276c145-56e0-48d0-ae37-a84dda92a947

Amirhaghi, S., Reehal, H.S., Plappert, E., Bajic, Z., Wood, R.J.K. and Wheeler, D.W. (1999) Growth and erosive wear performance of diamond coatings on WC substrates. Diamond and Related Materials, 8 (2-5), 845-849. (doi:10.1016/S0925-9635(98)00319-7).

Record type: Article

Abstract

Adherent diamond coatings up to ~30 ?m thick have been grown by microwave plasma CVD on WC substrates and their erosive wear properties investigated under high velocity air–sand erosion testing. Coating properties, particularly residual stress and adhesion, are sensitive functions of surface pre-treatment and deposition procedures. Adherent coatings offer significantly better erosion resistance compared to uncoated substrates, with the erosion rate being lower by up to a factor of ~5 based on the results obtained to date. Also films with low residual stress appear to exhibit longer lifetimes under testing. Failure tends to occur catastrophically along the coating–substrate interface. The grain boundaries do not appear to represent an easy route for crack propagation. Their strength appears to be comparable to that of the grains themselves.

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More information

Published date: 1999
Keywords: diamond coatings, erosive wear, tungsten carbide

Identifiers

Local EPrints ID: 21262
URI: http://eprints.soton.ac.uk/id/eprint/21262
ISSN: 0925-9635
PURE UUID: d4644c7f-845d-4669-b893-a1b41b3dd9db

Catalogue record

Date deposited: 16 Nov 2006
Last modified: 15 Jul 2019 19:24

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Contributors

Author: S. Amirhaghi
Author: H.S. Reehal
Author: E. Plappert
Author: Z. Bajic
Author: R.J.K. Wood
Author: D.W. Wheeler

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