Date of Award

7-11-2015

Publication Type

Master Thesis

Degree Name

M.A.Sc.

Department

Mechanical, Automotive, and Materials Engineering

First Advisor

Nie, Yuan

Keywords

Aluminium liner, Coefficient of friction, Flexible honing, PEO coatings, Sliding velocity, Surface roughness

Rights

info:eu-repo/semantics/openAccess

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Abstract

Plasma electrolytic oxidizing (PEO) is an advanced technique that has been widely used in automotive industry to produce ceramic coatings on light metal components due to their high hardness, wear resistance, corrosion resistance and low friction coefficient. In this work, PEO process was used to produce a relatively thick (~20 μm) coating on A356 Al alloy for improving the wear resistance and tribological properties of the Al alloy. Effects of surface roughness and sliding velocity on the coefficient of friction (COF) of PEO coatings were particularly investigated in different tribological tests including low speed pin-on-disc tests, high speed pin-on-disc tests, and high speed piston ring on liner tests. Cast iron was used as reference material for comparison with PEO coatings. The research results indicated that the PEO coatings could have excellent tribological properties potential for linerless aluminium engine applications.

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