The University of Southampton
University of Southampton Institutional Repository

High energy solid particle erosion mechanisms of superhard CVD coatings

High energy solid particle erosion mechanisms of superhard CVD coatings
High energy solid particle erosion mechanisms of superhard CVD coatings
The high hardness of boron carbide (B13C2) and diamond make them attractive candidates for use as erosion- and abrasion-resistant coatings in applications such as valves and pumps used in the off-shore oil industry. This paper compares the dominant solid particle erosion mechanisms of boron carbide and diamond coatings produced by chemical vapour deposition (CVD), when subjected to high energy particle impacts. To generate a range of impact damage features, a variety of erodents were used with differing hardness and shape. The erosion tests were performed on a gas blast erosion rig using spherical soda-lime glass beads, angular quartz silica sand and diamond grit, at impingement velocities between 130 and 270 m s?1 and an erodent particle flux of 0.5 kg m?2 s?1. A range of techniques including optical interferometry, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), identified the damage mechanisms. For boron carbide, erosion occurred via removal of the coating through lateral/radial cracks generated by particle impacts. For the diamond coatings, the damage was in the form of stress-wave induced circumferential crack formation at delaminated regions of the coating leading to ejection of material within the cracks. The coatings were found to have a high threshold velocity for the initiation and propagation of the above damage features. Diamond was found to be highly resistant to the propagation of lateral–radial crack systems, which reflected in its superior erosion performance compared to boron carbide.
solid particle erosion, superhard, cvd coatings, high energy particle impact
0043-1648
135-144
Bose, K.
0c7c0fc4-9386-4cef-a70d-e3c810db005c
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Wheeler, D.W.
d276c145-56e0-48d0-ae37-a84dda92a947
Bose, K.
0c7c0fc4-9386-4cef-a70d-e3c810db005c
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Wheeler, D.W.
d276c145-56e0-48d0-ae37-a84dda92a947

Bose, K., Wood, R.J.K. and Wheeler, D.W. (2005) High energy solid particle erosion mechanisms of superhard CVD coatings. Wear, 259 (1-6), 135-144. (doi:10.1016/j.wear.2005.02.043).

Record type: Article

Abstract

The high hardness of boron carbide (B13C2) and diamond make them attractive candidates for use as erosion- and abrasion-resistant coatings in applications such as valves and pumps used in the off-shore oil industry. This paper compares the dominant solid particle erosion mechanisms of boron carbide and diamond coatings produced by chemical vapour deposition (CVD), when subjected to high energy particle impacts. To generate a range of impact damage features, a variety of erodents were used with differing hardness and shape. The erosion tests were performed on a gas blast erosion rig using spherical soda-lime glass beads, angular quartz silica sand and diamond grit, at impingement velocities between 130 and 270 m s?1 and an erodent particle flux of 0.5 kg m?2 s?1. A range of techniques including optical interferometry, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), identified the damage mechanisms. For boron carbide, erosion occurred via removal of the coating through lateral/radial cracks generated by particle impacts. For the diamond coatings, the damage was in the form of stress-wave induced circumferential crack formation at delaminated regions of the coating leading to ejection of material within the cracks. The coatings were found to have a high threshold velocity for the initiation and propagation of the above damage features. Diamond was found to be highly resistant to the propagation of lateral–radial crack systems, which reflected in its superior erosion performance compared to boron carbide.

This record has no associated files available for download.

More information

Published date: 2005
Keywords: solid particle erosion, superhard, cvd coatings, high energy particle impact

Identifiers

Local EPrints ID: 23324
URI: http://eprints.soton.ac.uk/id/eprint/23324
ISSN: 0043-1648
PURE UUID: b9a595a4-5c7e-4800-b937-24b69165e948
ORCID for R.J.K. Wood: ORCID iD orcid.org/0000-0003-0681-9239

Catalogue record

Date deposited: 14 Mar 2006
Last modified: 16 Mar 2024 02:46

Export record

Altmetrics

Contributors

Author: K. Bose
Author: R.J.K. Wood ORCID iD
Author: D.W. Wheeler

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×