The papers included in this issue of ECS Transactions were originally presented in the symposium ¿Corrosion and Electrochemical Properties of Bulk Metallic Glasses and Nano-Crystalline Materials¿, held during the PRiME 2008 joint international meeting of The Electrochemical Society and The Electrochemical Society of Japan, with the technical cosponsorship of the Japan Society of Applied Physics, the Korean Electrochemical Society, the Electrochemistry Division of the Royal Australian Chemical Institute, and the Chinese Society of Electrochemistry. This meeting was held in Honolulu, Hawaii, from October 12 to 17, 2008.

Metallic glasses are multi-component metallic alloys with disordered atomic distribution unlike their crystalline counterparts with long range periodicity in arrangement of atoms. Metallic glasses of different compositions are being commercially used in bulk form and as coatings because of their excellent corrosion resistance. This book was written with the objective of providing a comprehensive understanding of the electrochemical and corrosion behavior of metallic glasses for a wide range of compositions. Corrosion in structural materials leads to rapid deterioration in the performance of critical components and serious economic implications including property damage and loss in human life. Discovery and development of metallic alloys with enhanced corrosion resistance will have a sizable impact in a number of areas including manufacturing, aerospace, oil and gas, nuclear industry, and load-bearing bioimplants. The corrosion resistance of many metallic glass systems is superior compared to conventionally used alloys in different environments. In this book, we discuss in detail the role of chemistry, processing conditions, environment, and surface state on the corrosion behavior of metallic glasses and compare their performance with conventional alloys. Several of these alloy systems consist of all biocompatible and non-allergenic elements making them attractive for bioimplants, stents, and surgical tools. To that end, critical insights are provided on the bio-corrosion response of some metallic glasses in simulated physiological environment.

Volume is indexed by Thomson Reuters CPCI-S (WoS). This book deals with the chemical and electrochemical reactivity of novel materials in various environments. Special emphasis is put on metastable materials such as amorphous and nanostructured materials including carbon nanostructures and the novel bulk metallic glasses. Properties include corrosion resistance, electrochemical and catalytic activities, hydrogen sorption properties etc. The materials are made by various non-equilibrium processes such as rapid-quenching, high energy ball milling and thin film deposition techniques. Hydrogen storage and new materials for Ni-MH batteries are topics of particular interest in this book.

Bulk metallic glasses (BMGs) represent an emerging class of materials with an amorphous structure and a unique combination of properties. Some of these outstanding properties include exceptionally high strength, large elastic deformation, near-net-shape formability, and superplasticity. However, these materials are not commonly used in structural applications because of a lack of plasticity and a lack of clarity in terms of deformation and failure mechanisms. Furthermore, the electrochemical behavior of these materials with and without loading is not well defined. Thus, the objectives of this study were to define and model the electrochemical and mechanical behaviors of BMGs, in addition to the interactions between these. The electrochemical behaviors of Zr-, Ti- and Ca-based BMGs have been studied in various environments. Moreover, the electrochemical behaviors of several common, crystalline materials have also been characterized in the same environments to facilitate comparisons. In general, the Zr- and Ti-based BMG alloys demonstrated relatively good general corrosion resistance in all of the environments. Mean corrosion penetration rates (CPRs) were found to be less than 30 [mu][micrometer]/year for these alloys. On the other hand, the Ca-based BMG alloys were found to be highly active with CPRs ranging from 300 - 5700 [mu][micrometer]/year in a non-aggressive 0.05 M Na2SO4 electrolyte. Furthermore, most of these alloys were found to be susceptible to localized corrosion in these environments. However, the Zr- and Ti-based BMG alloys exhibited relatively high, positive values for both pitting overpotentials ... and protection overpotentials ... The Zr-based BMG commonly known as Vitreloy 105 (Vit 105) was selected for further studies. This material was fabricated at the Oak Ridge National Laboratory by arc-melting and drop-casting into a water-cooled, copper mold. Mechanical characterization of this alloy was conducted through four-point bend fatigue testing, as well as tensile testing with in situ thermography. Fatigue testing in air revealed that both the fatigue lives at various stresses and the fatigue endurance limit are similar to those reported for this material in uniaxial fatigue. This result alone demonstrates that the great differences in fatigue results reported in the literature are not due to differences in testing geometry. In fact, the larger scatter observed in four-point bend fatigue at a given stress range was found to be due to variations in material quality.

In spite of the large amount of research activity in this subfield of materials science and engineering, there is no single book available that provides background information, methods of synthesis, characterization procedures, properties, and potential and existing applications.of bulk metallic glasses. Written in an easy-to-understand style by pioneering researchers in this field, Bulk Metallic Glasses is one of the first books to coherently discuss the synthesis, processing, properties, and applications of these unique materials. The book explores the differences between nanocrystalline, glassy, and amorphous solids as well as the thermodynamics and kinetics and various processing methods of glass formation. It critically compares the different criteria for glass formation, describes the advantages and limitations of experimental methods for synthesizing bulk metallic glasses in assorted sizes and shapes, and examines the kinetics of crystallization/devitrification and the mechanisms of transformations. It also covers the density, diffusivity, thermal expansion, electrical resistivity, specific heat, viscosity, corrosion resistance, mechanical behavior, and magnetic properties of bulk metallic glasses. After presenting a wide array of applications, the book concludes with a discussion on the future of these materials. The adoption of bulk metallic glasses into existing systems is besieged by many obstacles but due to their interesting combination of properties, future applications may be unlimited. A one-stop resource on all aspects of bulk metallic glasses, this book demonstrates the immense potential of these novel materials. It clearly elucidates the background, detailed methods of synthesis and characterization, structure, and properties of bulk metallic glasses.

Metallic glasses are very promising engineering and functional materials due to their unique mechanical, chemical, and physical properties, attracting increasing attention from both scientific and industrial communities. However, their practical applications are greatly hindered due to three main problems: dimensional limit, poor tension plasticity, and difficulty in machining and shaping. Therefore, further investigation of these issues is urgently required. This book provides readers with recent achievements and developments in the properties and processing of metallic glasses, including mainly thermoplastic forming of metallic glasses (Chapter 2), atomic-level simulation of mechanical deformation of metallic glasses (Chapter 3), metallic glass matrix composites (Chapter 4), and tribo-electrochemical applications of metallic glasses (Chapters 5 and 6).