Book Reuiews 403

COHESION IN METALS (Cohesion and Structure, vol. 1) by F.R. de Boer, R. Boom, W.C.M. Mattens, A.R. Miedema and A.K. Niessen (Elsevier, Amsterdam, 1988) pp. xiv + 758, hardbound, US $131.50/Dfl250-. ISBN O-444-87098-9

Level: Specialist/graduate Reviewer: Erik Johnson, Copenhagen

The volume contains about 160 pages of text and 600 pages of tables. The text is presented in three chapters treating fundamental properties and applica- tions of the “macroscopic atom” model. This concept has been used by the authors to generate a series of key tables on enthalpies of alloy formation for the 3d-, 4d- and Sd-transition metals, as well as a series of tables concerning fundamental aspects and applications of the model.

The “macroscopic atom” model is an empirical model originating from the basic assumption that many of the considerations that apply to the situation in which two macroscopic pieces of metal are brought into contact, remain valid when the sizes of the pieces are reduced to atomic dimensions. Consequently, atoms can be considered as building blocks and energy effects on an atomic scale can be treated as interfacial energies between atomic cells. The all important parameters then become the electron density at the boundary of the Wigner-Seitz atomic cell and the chemical potential for electronic charge. Within this concept the authors de- velop the model in two stages. Firstly, they develop various aspects of the enthalpy of formation of metallic alloys in relation to interface energies, presenting series of comparisons between experimental and calculated values, and they provide empirical rules to be used

SURFACE MODIFICATION TECHNOLOGIES (Proceedings of the Symposium on Surface Modifica- tion Technology) edited by T.S. Sudarshan and D.G. Bhat (The Metallurgical Society, Warrendale, PA, 1988) pp. viii + 327, $90 ($49 AIME Members), ISBN 87339- 045-8

Level: Graduate engineer Reviewer: C.J. McHargue, Oak Ridge

The stated aim of this volume is to provide an introduction to the different surface modification tech- nologies available to the engineer who wishes to obtain an overview of the field. It emphasizes metallurgical and ceramic coatings rather than thin films and the applica- tions are directed toward wear, erosion, or corrosion protection or thermal barrier coatings. The book is based on 16 invited reviews given at the First Intema- tional Conference on Surface Modification Technolo-

when experimental results are scarce or not available. The results of this work are compiled in an amazing series of tables presenting phase diagrams and experi- mental and predicted enthalpies of alloy formation for the transition metals. Secondly, they use the model to discuss, calculate and tabulate a long series of physical properties of alloys such as stabilities of ternary sys- tems, interfacial energies, adsorbtion, surface segrega- tion, vacancy formation and MSssbauer isomer shifts.

It is fascinating to follow the development of the “macroscopic atom” model from its very simple basis to the very complex systems that can be treated with significant success. The work has been developed and extended by the authors over the last 15 to 20 years with the primary aim of predicting enthalpy effects in alloys and to generate results of practical relevance. The next is remarkably concise and logically structured, although it has a certain lack of pedagogical approach. It will be difficult for a nonspecialist in the field easily to assess the various empirical relations between experi- mental and theoretical data. With the tremendous wealth of data compiled in the tables this is, however, the way the book will mostly be used. It is therefore felt as an obvious lack that the authors have not included an introductory chapter for “beginners” describing the ideas and general concepts behind the “macroscopic atom” model.

With this in mind, the volume will nevertheless be enjoyable as an introduction to the “macroscopic atom” model showing what can be achieved by simple means. And it will be invaluable in all materials research laboratories and libraries for its many tabulations of thermodynamic properties of alloys and intermetallic systems.

gies held in connection with the TMS-AIME Annual Meeting in Phoenix, January 25-28,1988.

The book covers three principal topics: deposition or modification techniques, characterization methods, and modeling. The main thrust is the description of various methods of depositing coatings or performing surface modifications. Ten of the sixteen papers fall into this subject. Ahbough the title suggests modification of the surface structure, only portions of three papers treat this subject (ion implantation, laser treatments, and diffusion metallizing) and the emphasis is on deposition of coatings.

The coating techniques described include: Chemical Vapor Deposition, Physical Vapor Deposition, Electron Beam Techniques, Plasma Deposition, Ion Assisted Coating, Electra-spark Deposition, Electroless Deposi- tion, Laser Processing, Diffusion Metallizing, and Arc- Plasma Deposition. As to be expected in short (i.e., about 20 page) summaries, the papers generally devote