Micro-abrasion of filled and unfilled polyamide 11 coatings
Micro-abrasion of filled and unfilled polyamide 11 coatings
In this study, five polyamide (PA11) based coatings have been investigated; two filled with different types of solid fillers (TiO2) and in different proportions, and two unfilled coatings, deposited onto carbon steel substrates. Tests were conducted using a Phoenix Tribology TE99 micro-abrasion tester. A 25 mm diameter hardened and pitted carbon steel ball was loaded against the sample and rotated in the presence of 5 µm silicon carbide (SiC) abrasive slurry with a solids concentration of 0.375 g/cm3. Tests were conducted under optimum conditions for grooving (two-body) abrasion.
The wear rates are presented as a function of load, total sliding distance and mechanical properties of the coating. The influence on coating performance of air-cooling and water-cooling the coating after deposition is explored. The unfilled coatings exhibited a specific wear rate (k) about 1.3 times lower than the filled coatings. The results, contrary to expectations, show that the fillers do not act as load-bearing elements within the coating matrix. The value of k decreased with increasing load for all the coatings but an irregular trend in k was observed as a function of sliding distance. Detailed scanning electron microscopy was performed on the wear scars to identify the wear mechanisms and the role of the fillers.
micro-abrasion, coatings, polyamide, slurry
294-302
Bello, J.O.
a8602fbd-2932-406c-ad61-a5141b3f07b3
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
2005
Bello, J.O.
a8602fbd-2932-406c-ad61-a5141b3f07b3
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Abstract
In this study, five polyamide (PA11) based coatings have been investigated; two filled with different types of solid fillers (TiO2) and in different proportions, and two unfilled coatings, deposited onto carbon steel substrates. Tests were conducted using a Phoenix Tribology TE99 micro-abrasion tester. A 25 mm diameter hardened and pitted carbon steel ball was loaded against the sample and rotated in the presence of 5 µm silicon carbide (SiC) abrasive slurry with a solids concentration of 0.375 g/cm3. Tests were conducted under optimum conditions for grooving (two-body) abrasion.
The wear rates are presented as a function of load, total sliding distance and mechanical properties of the coating. The influence on coating performance of air-cooling and water-cooling the coating after deposition is explored. The unfilled coatings exhibited a specific wear rate (k) about 1.3 times lower than the filled coatings. The results, contrary to expectations, show that the fillers do not act as load-bearing elements within the coating matrix. The value of k decreased with increasing load for all the coatings but an irregular trend in k was observed as a function of sliding distance. Detailed scanning electron microscopy was performed on the wear scars to identify the wear mechanisms and the role of the fillers.
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Published date: 2005
Additional Information:
Second International Conference on Erosive and Abrasive Wear
Keywords:
micro-abrasion, coatings, polyamide, slurry
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Local EPrints ID: 22984
URI: http://eprints.soton.ac.uk/id/eprint/22984
ISSN: 0043-1648
PURE UUID: a5366706-1ad9-44a4-baf8-783ab67e6d04
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Date deposited: 14 Mar 2006
Last modified: 16 Mar 2024 02:46
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Author:
J.O. Bello
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