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Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling

Christian Griffiths, A. Rees, G. Llewelyn, O.V. Fonesca, Andrew Rees

Journal of Coating Sciences and Technology, Volume: 5, Issue: 1, Pages: 1 - 11

Swansea University Authors: Christian Griffiths, Andrew Rees

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DOI (Published version): 10.6000/2369-3355.2018.05.01.1

Abstract

Micro-injection moulding (µIM) is a key technology for scaling down larger geometry components and can include functional features at the micrometre scale and as far as the sub-micrometre length scale. Thermal cycling of amorphous hydrogenated carbon (aC:H) coated Stainless Steel (SS) has been inves...

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Published in: Journal of Coating Sciences and Technology
ISSN: 2369-3355
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa43800
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last_indexed 2018-10-30T20:27:42Z
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spelling 2018-10-30T16:11:38.1264555 v2 43800 2018-09-12 Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling 84c202c256a2950fbc52314df6ec4914 Christian Griffiths Christian Griffiths true false e43e88c74976e714e1d669a898f8470d Andrew Rees Andrew Rees true false 2018-09-12 GENG Micro-injection moulding (µIM) is a key technology for scaling down larger geometry components and can include functional features at the micrometre scale and as far as the sub-micrometre length scale. Thermal cycling of amorphous hydrogenated carbon (aC:H) coated Stainless Steel (SS) has been investigated to simulate long-term micro-injection moulding (µIM) wearing and damage. Micro indentations and cracks were made into the mould and predictions of the crack behaviour were made using thermal expansion models. Validation of the results was performed with multiple heating and cooling cycles along with hardness measurements of the damage to the coating. The undamaged surfaces showed no major deformation but the cracks were shown to propagate and change in behaviour. The first two heat cycles of the testing had the most significant effect on the substrate with varying thermal expansions of materials being the main cause. The aC:H is shown to have excellent properties for mould tool applications but delamination could occur in areas susceptible to damaged and periodic surface inspection will be required preserve tool life. Journal Article Journal of Coating Sciences and Technology 5 1 1 11 2369-3355 Micro-injection moulding, aC:H, Microfabrication, Micro-indentation 31 12 2018 2018-12-31 10.6000/2369-3355.2018.05.01.1 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2018-10-30T16:11:38.1264555 2018-09-12T14:46:59.8349271 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Christian Griffiths 1 A. Rees 2 G. Llewelyn 3 O.V. Fonesca 4 Andrew Rees 5 0043800-12092018144858.pdf griffiths2018.pdf 2018-09-12T14:48:58.7400000 Output 7475513 application/pdf Version of Record true 2018-09-12T00:00:00.0000000 Advertised as and Open Access article on the TOC page for this issue. Note the copyright line on page one makes it look like it's not Open Access, but is clear on page 11. RK true eng
title Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
spellingShingle Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
Christian Griffiths
Andrew Rees
title_short Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
title_full Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
title_fullStr Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
title_full_unstemmed Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
title_sort Investigation of the Integrity of aC:H Coatings on Stainless Steel Micro-Moulds during Thermal Cycling
author_id_str_mv 84c202c256a2950fbc52314df6ec4914
e43e88c74976e714e1d669a898f8470d
author_id_fullname_str_mv 84c202c256a2950fbc52314df6ec4914_***_Christian Griffiths
e43e88c74976e714e1d669a898f8470d_***_Andrew Rees
author Christian Griffiths
Andrew Rees
author2 Christian Griffiths
A. Rees
G. Llewelyn
O.V. Fonesca
Andrew Rees
format Journal article
container_title Journal of Coating Sciences and Technology
container_volume 5
container_issue 1
container_start_page 1
publishDate 2018
institution Swansea University
issn 2369-3355
doi_str_mv 10.6000/2369-3355.2018.05.01.1
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
active_str 0
description Micro-injection moulding (µIM) is a key technology for scaling down larger geometry components and can include functional features at the micrometre scale and as far as the sub-micrometre length scale. Thermal cycling of amorphous hydrogenated carbon (aC:H) coated Stainless Steel (SS) has been investigated to simulate long-term micro-injection moulding (µIM) wearing and damage. Micro indentations and cracks were made into the mould and predictions of the crack behaviour were made using thermal expansion models. Validation of the results was performed with multiple heating and cooling cycles along with hardness measurements of the damage to the coating. The undamaged surfaces showed no major deformation but the cracks were shown to propagate and change in behaviour. The first two heat cycles of the testing had the most significant effect on the substrate with varying thermal expansions of materials being the main cause. The aC:H is shown to have excellent properties for mould tool applications but delamination could occur in areas susceptible to damaged and periodic surface inspection will be required preserve tool life.
published_date 2018-12-31T03:55:08Z
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score 11.037603

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