Author : A. Samir, H.
Study the Properties of Microplasma Oxidation Coatings (MPO) Deposited on Aluminum Alloy under modified Conditions
journal of kerbala university,
Volume 4, Issue 3, Pages 243-250
Over the past years, great achievements have been made in the domain of existing many surface coating technologies for surface improvement of aluminum alloys. Despite these achievements, the domination in the market is strongly affected by ability of surface coating technology, by means of technical and economic considerations, to meet the increased demands for heavy tribological applications of aluminum alloys. The MPO technology has recently been studied as a novel and effective means to provide improved properties such as thick and hard ceramic coating with excellent load-bearing and wear resistance properties on aluminum alloys. The aim of the present research is to study the properties of MPO coatings deposited on aluminum alloys under modified conditions so as to improve the hardness of MPO coatings by reducing the porosity which is the most complex phenomenon can affect the distribution and measurements of hardness, and wear rates of the coatings. The results proved that the coatings produced by the modified conditions show significant improvement in porosity and hardness properties for thicker coatings.
Key words: Micro plasma oxidation MPO; aluminum alloys; hardness; porosity