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| Abstract No.: |
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Scheduled at:
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Friday, May 23, 2014, Hall H3 11:20 AM
Pre- & Post-Treatment
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| Title: |
Surface roughness of plasma sprayed coatings: A statistical approach
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| Authors: |
Jo Ann Gan / Swinburne University of Technology, Australia
Christopher Berndt* / Swinburne University of Technology, Australia
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| Abstract: |
Coatings deposited by thermal spray processes have relatively rough surfaces compared to other deposition methods. Surface roughness influences not only the microstructural characteristics and adhesion of a coating but also other coatings properties such as friction coefficient and magnetic properties. In this work, different surface roughness parameters of plasma sprayed coatings including the height (average roughness, root mean square roughness,maximum height of roughness profile, and average maximum height of roughness profile) and shape (skewness and kurtosis) parameters were measured using contact profilometry and analysed using statistical methods. The significance of measurement direction and evaluation length on the accuracy of surface roughness values was evaluated using Tukeys test and analysis of variance (ANOVA). The effects of standoff distance and annealing process on the surface roughness of plasma coatings were determined. The correlation between the surface roughness and coatings porosity was also established.
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