Tribological performance of CrAlYN-based nanocomposite coatings

The incorporation of Y has been known to improve the oxidation resistance and thermal stability of Cr-based nitride hard coatings. This is especially important in high temperature engineering applications (e.g. > 1000°C). In particular, the tribological properties of Y-doped coatings are of signi...

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Main Author: Ong, Winston Bao De
Other Authors: Liu Erjia
Format: Final Year Project
Language:English
Published: 2017
Subjects:
Online Access:http://hdl.handle.net/10356/71635
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-716352023-03-04T18:19:04Z Tribological performance of CrAlYN-based nanocomposite coatings Ong, Winston Bao De Liu Erjia School of Mechanical and Aerospace Engineering A*STAR Singapore Institute of Manufacturing Technology DRNTU::Engineering::Aeronautical engineering The incorporation of Y has been known to improve the oxidation resistance and thermal stability of Cr-based nitride hard coatings. This is especially important in high temperature engineering applications (e.g. > 1000°C). In particular, the tribological properties of Y-doped coatings are of significant interest. Hence, this project aims to study the tribological performance of CrAlYN hard coatings with varying Y-doped content. The coatings were deposited using HIPIMS PVD technique, and their chemical composition and mechanical properties were evaluated using EDS and nanoindentation respectively. XRD and SEM were used to evaluate the crystalline phases and fracture morphology respectively. Tribological properties, such as the friction coefficient and wear rate, were evaluated using a ball-on-disk tribometer at room temperature, where the counterface used was a 6-mm diameter Al2O3 ball. SEM and EDS were subsequently used to analyse the features of the wear track and element distribution across the wear track. Wear performance declined for the coatings with a higher Y content. On the other hand, the coatings with low to moderate Y content had comparable wear performance with the CrN and CrAlN coatings, with the promise of improved high temperature wear performance. Bachelor of Engineering (Aerospace Engineering) 2017-05-18T03:07:31Z 2017-05-18T03:07:31Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/71635 en Nanyang Technological University 102 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Aeronautical engineering
spellingShingle DRNTU::Engineering::Aeronautical engineering
Ong, Winston Bao De
Tribological performance of CrAlYN-based nanocomposite coatings
description The incorporation of Y has been known to improve the oxidation resistance and thermal stability of Cr-based nitride hard coatings. This is especially important in high temperature engineering applications (e.g. > 1000°C). In particular, the tribological properties of Y-doped coatings are of significant interest. Hence, this project aims to study the tribological performance of CrAlYN hard coatings with varying Y-doped content. The coatings were deposited using HIPIMS PVD technique, and their chemical composition and mechanical properties were evaluated using EDS and nanoindentation respectively. XRD and SEM were used to evaluate the crystalline phases and fracture morphology respectively. Tribological properties, such as the friction coefficient and wear rate, were evaluated using a ball-on-disk tribometer at room temperature, where the counterface used was a 6-mm diameter Al2O3 ball. SEM and EDS were subsequently used to analyse the features of the wear track and element distribution across the wear track. Wear performance declined for the coatings with a higher Y content. On the other hand, the coatings with low to moderate Y content had comparable wear performance with the CrN and CrAlN coatings, with the promise of improved high temperature wear performance.
author2 Liu Erjia
author_facet Liu Erjia
Ong, Winston Bao De
format Final Year Project
author Ong, Winston Bao De
author_sort Ong, Winston Bao De
title Tribological performance of CrAlYN-based nanocomposite coatings
title_short Tribological performance of CrAlYN-based nanocomposite coatings
title_full Tribological performance of CrAlYN-based nanocomposite coatings
title_fullStr Tribological performance of CrAlYN-based nanocomposite coatings
title_full_unstemmed Tribological performance of CrAlYN-based nanocomposite coatings
title_sort tribological performance of cralyn-based nanocomposite coatings
publishDate 2017
url http://hdl.handle.net/10356/71635
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