Next Article in Journal
Effects of Rare Earth Elements on Properties of Ni-Base Superalloy Powders and Coatings
Previous Article in Journal
Surface Enhanced Raman Scattering Substrates Made by Oblique Angle Deposition: Methods and Applications
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Coatings 2017, 7(2), 28; doi:10.3390/coatings7020028

Improving the Wear Resistance of Moulds for the Injection of Glass Fibre–Reinforced Plastics Using PVD Coatings: A Comparative Study

1
ISEP—School of Engineering, Polytechnic of Porto, 4200-072 Porto, Portugal
2
INEGI—Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, 4200-465 Porto, Portugal
3
TEandM—Tecnologia, Engenharia e Materiais; 3045-508 Taveiro, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Lavacchi
Received: 31 December 2016 / Revised: 8 February 2017 / Accepted: 9 February 2017 / Published: 16 February 2017
View Full-Text   |   Download PDF [6057 KB, uploaded 16 February 2017]   |  

Abstract

It is well known that injection of glass fibre–reinforced plastics (GFRP) causes abrasive wear in moulds’ cavities and runners. Physical vapour deposition (PVD) coatings are intensively used to improve the wear resistance of different tools, also being one of the most promising ways to increase the moulds’ lifespan, mainly when used with plastics strongly reinforced with glass fibres. This work compares four different thin, hard coatings obtained using the PVD magnetron sputtering process: TiAlN, TiAlSiN, CrN/TiAlCrSiN and CrN/CrCN/DLC. The first two are monolayer coatings while the last ones are nanostructured and consist of multilayer systems. In order to carry out the corresponding tribological characterization, two different approaches were selected: A laboratorial method, using micro-abrasion wear tests based on a ball-cratering configuration, and an industrial mode, analysing the wear resistance of the coated samples when inserted in a plastic injection mould. As expected, the wear phenomena are not equivalent and the results between micro-abrasion and industrial tests are not similar due to the different means used to promote the abrasion. The best wear resistance performance in the laboratorial wear tests was attained by the TiAlN monolayer coating while the best performance in the industrial wear tests was obtained by the CrN/TiAlCrSiN nanostructured multilayer coating. View Full-Text
Keywords: PVD coating; sputtering; wear behaviour; TiAlN; TiAlSiN; diamond-like carbon (DLC); injection moulds; abrasion; glass-fibre reinforced plastics (GFRP) PVD coating; sputtering; wear behaviour; TiAlN; TiAlSiN; diamond-like carbon (DLC); injection moulds; abrasion; glass-fibre reinforced plastics (GFRP)
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Silva, F.; Martinho, R.; Andrade, M.; Baptista, A.; Alexandre, R. Improving the Wear Resistance of Moulds for the Injection of Glass Fibre–Reinforced Plastics Using PVD Coatings: A Comparative Study. Coatings 2017, 7, 28.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top