25 Tribology of Nanostructured and Composite Coatings Ali Erdemir and Osman Levent Eryilmaz Argonne National Laboratory, Argonne, Illinois Mustafa Urgen and Kursat Kazmanli Istanbul Technical University, Istanbul, Turkey Nikhil Mehta and Barton Prorok Auburn University, Auburn, Alabama CONTENTS 25.1 Introduction 25.2 Recent Advances in Deposition Technologies 25.2.1 Hybrid Deposition Processes 25.2.2 Control of Process Parameters 25.2.3 Modern Coating Practices 25.3 Structure and Mechanical Properties 25.4 Tribology of Nanostructured and Composite Films 25.4.1 Self-Lubricating Nanocomposite Coatings 25.4.2 Superhard Nanocomposite Films 25.4.3 Nanostructured Carbon Films 25.4.3.1 Nanocrystalline Diamond Films 25.4.3.2 Nanostructured Carbide-Derived Carbon 25.4.3.3 Nanocomposite Diamond-Like Carbon Films 25.5 Novel Design Concepts for Self-Lubricating Nanocomposite Films for High-Temperature Applications 25.6 Summary Acknowledgments References 25.1 INTRODUCTION In recent years, there has been an overwhelming interest in the production and widespread utiliza- tion of multifunctional, nanostructured, and composite coatings by various industries [1–4]. Specifically, increasing demands for greater power density, more compact design, better reliability, Copyright 2006 by Taylor & Francis Group, LLC