Performance improvement of Al‐alloyed materials via plasma spray coating

Performance improvement of Al‐alloyed materials via plasma spray coating Purpose – The aim of the research is to increase piston and engine performance by using ceramic coated pistons instead of pistons which are manufactured from aluminum alloys and having a coated flame chamber. Design/methodology/approach – Thermal torch and thermal shock tests were performed on the pistons and some specimens of 1.5 mm thick were prepared according to ASTM standards; both have the same material characteristics. In the present work, plasma spray technique was used for ceramic coating. Findings – It was found that the ceramic coating, which, when performed properly, has compatible expansion coefficient with the aluminum alloy pistons, increases performance of pistons and engines. Research limitations/implications – Coatings were limited with one type of bonding and two ceramics, and coated parts were subjected to thermal torch and thermal shock tests. Practical implications – For future work, instead of using other coating materials, stable yttria is used as the best coating material with optimum thermal resistance. By this process, working life of the machine parts can be extended and a number of economical advantages may also be obtained. Originality/value – This paper fulfils the identified information and offers practical help to the industrial firms working with ceramic coatings and also to the academicians working on wear of materials. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Industrial Lubrication and Tribology Emerald Publishing

Performance improvement of Al‐alloyed materials via plasma spray coating

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Publisher
Emerald Publishing
Copyright
Copyright © 2008 Emerald Group Publishing Limited. All rights reserved.
ISSN
0036-8792
D.O.I.
10.1108/00368790810839873
Publisher site
See Article on Publisher Site

Abstract

Purpose – The aim of the research is to increase piston and engine performance by using ceramic coated pistons instead of pistons which are manufactured from aluminum alloys and having a coated flame chamber. Design/methodology/approach – Thermal torch and thermal shock tests were performed on the pistons and some specimens of 1.5 mm thick were prepared according to ASTM standards; both have the same material characteristics. In the present work, plasma spray technique was used for ceramic coating. Findings – It was found that the ceramic coating, which, when performed properly, has compatible expansion coefficient with the aluminum alloy pistons, increases performance of pistons and engines. Research limitations/implications – Coatings were limited with one type of bonding and two ceramics, and coated parts were subjected to thermal torch and thermal shock tests. Practical implications – For future work, instead of using other coating materials, stable yttria is used as the best coating material with optimum thermal resistance. By this process, working life of the machine parts can be extended and a number of economical advantages may also be obtained. Originality/value – This paper fulfils the identified information and offers practical help to the industrial firms working with ceramic coatings and also to the academicians working on wear of materials.

Journal

Industrial Lubrication and TribologyEmerald Publishing

Published: Feb 8, 2008

Keywords: Coatings technology; Ceramics; Spraying; Wear resistance

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