Nanocoatings: Size Effect In Nanostructured Films

Engineering Materials For further volumes: http://www.springer.com/series/4288 Mahmood Aliofkhazraei Nanocoatings Size Effect in Nanostructured Films 123 Dr. Mahmood Aliofkhazraei Materials Engineering Department Tarbiat Modares University Jalal Ale Ahmad Highway 14115 Tehran Iran e-mail: [email protected] ISSN 1612-1317 e-ISSN 1868-1212 ISBN 978-3-642-17965-5 e-ISBN 978-3-642-17966-2 DOI 10.1007/978-3-642-17966-2 Springer Heidelberg Dordrecht London New York Ó Springer-Verlag Berlin Heidelberg 2011 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: deblik, Berlin Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) Preface In recent years, nanostructured coatings are used on surface of different parts with the aim of increasing their resistance against erosion, corrosion etc. The scale of nanomaterials should be classified from 1–100 nm which means clusters or (atomic) nuclear pellet with no less than 100 nm, fibers less than 100 nm in diameter and films thickness less than 100 nm. In this range nanomaterials show specific properties which they did not show for bigger dimensions such as micrometers. This effects which have came from size of nanomaterials are known as ‘‘size effect’’. Today, with the development and expansion of nanotechnology, nanostructured coatings are widely used in military, aerospace, electronic and magnetic industries, etc. due to having appropriate and unique properties such as magnetic properties, corrosion resistance, high hardness and wear strength. They have been developed remarkably in recent two decades. These coatings improve properties of substrate. Hence, coatings resistant against erosion and corrosion, self-lubricant system and hard coatings can be produced. Increased attention to size effect in nanostructures during recent years can be seen in Fig. 1. In comparison with coatings with micrometer-ranged thickness, nanostructured coatings usually enjoy better and appropriate properties. Strength and resistance Fig. 1 Comparison among number of journal articles about