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Author: Glenn E. Beltz Publisher: ISBN: Category : Reference Languages : en Pages : 360
Book Description
Dramatic progress has been made in the fundamentals of fracture, with special emphasis on the ductile/brittle transition across a broad spectrum of material classes. Unfortunately, however, since these studies are carried out in diverse research communities, communication among the different groups is limited. This book brings these diverse groups together. Contributions generally follow the topical outline upon which the symposium was organized. Part I deals with brittle/ductile behavior of steels and structural metallic alloys. The development of analytical models based on micromechanical models, such as dislocation mechanics and cohesive/contact zone models, is the focus of Part II. Nonmetals, including silicon, are reviewed in Parts III and IV. Fractals, chaos, and scaling theories, with emphasis on fracture in heterogeneous solids, is the basis of Part V. Crystal plasticity and mesoscale dislocation modelling follow in Part VI, with the technologically significant area of interfacial fracture featured in Part VII.
Author: Glenn E. Beltz Publisher: ISBN: Category : Reference Languages : en Pages : 360
Book Description
Dramatic progress has been made in the fundamentals of fracture, with special emphasis on the ductile/brittle transition across a broad spectrum of material classes. Unfortunately, however, since these studies are carried out in diverse research communities, communication among the different groups is limited. This book brings these diverse groups together. Contributions generally follow the topical outline upon which the symposium was organized. Part I deals with brittle/ductile behavior of steels and structural metallic alloys. The development of analytical models based on micromechanical models, such as dislocation mechanics and cohesive/contact zone models, is the focus of Part II. Nonmetals, including silicon, are reviewed in Parts III and IV. Fractals, chaos, and scaling theories, with emphasis on fracture in heterogeneous solids, is the basis of Part V. Crystal plasticity and mesoscale dislocation modelling follow in Part VI, with the technologically significant area of interfacial fracture featured in Part VII.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This volume contains papers presented at the 1998 MRS Fall Meeting in Boston, Massachusetts, in Symposium M, entitled "Fracture and Ductile vs. Brittle Behavior-Theory, Modelling and Experiment." The symposium brought together the many communities that investigate the fundamentals of fracture, with special emphasis on the ductile/brittle transition across a broad spectrum of material classes, fracture at interfaces, and modelling fracture over various length scales. Theoretical techniques discussed ranged from first-principles electronic structure theory to atomistic simulation to mesoscale and continuum theories, along with studies of fractals and scaling in fracture. Experimental and theoretical talks were interspersed throughout all sessions, rather than being segregated. The contributions to this volume generally follow the topical outline upon which the symposium was organized. The first part, dealing with ductile vs. brittle behavior in metals, concerns itself with investigations of high-strength steel, magnesium alloys, ordered intermetallics, and Fe-Cr-Al alloys. The development of analytical methods based on micromechanical models, such as dislocation mechanics and cohesive/contact zone models, are covered in a follow-up section. Nonmetals, including silicon, are considered in Parts III and IV. Fractals, chaos, and scaling theories are taken up in Part V, with a special emphasis on fracture in heterogeneous solids. Modelling based on large populations of dislocations has substantially progressed during the past three years, hence, a section devoted to crystal plasticity and mesoscale dislocation modelling appears next. Finally, the technologically significant area of interfacial fracture, with applications to composites and intergranular fracture, is taken up in Part VII.
Author: S. J. Pearton Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 1056
Book Description
This book covers the full spectrum of activity in the GaN and related materials arena. These semiconductors are finding applications in full-color displays, high-density information storage, white lighting for outdoor or backlit displays, solar-blind UV detectors, high-power/high-temperature electronics, and covert undersea communications. Progress is been reported in the growth of thick layers on patterned substrates by various methods, leading to lower overall defect concentrations and improved current-voltage and reliability characteristics. The rapidly increasing market for blue/green LEDs is also noted by the entry of a number of new companies to the field. While these emitter technologies continue to be dominated by MOCVD material, there are exciting reports of UV detectors and HFET structures grown by MBE with device performance at least as good as by MOCVD. Topics include: GaN electronic and photonic devices; laser diodes and spectroscopy; electronic devices and processing; quantum dots and processing; novel growth, doping and processing and rare-earth doping and optical emission.
Author: S. A. Ringel Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 338
Book Description
This book contains the proceedings of two symposia - 'Integration of Dissimilar Materials in Micro- and Optoelectronics' and 'III-V and SiGe Group IV Device/IC Processing Challenges for Commercial Applications'. The publication stems from the desire to achieve new levels of device functionality and higher levels of performance via integration of devices based on dissimilar semiconductors, where the constraint of lattice-matching on the breadth of attainable devices can be reduced. It covers fundamental topics germane to integration of a wide range of dissimilar materials spanning wide-bandgap III-V nitrides, III-V/Si integration, II-VI and II-VI/III-V compounds, heterovalent structures, oxides, photonic bandgap structures and others. Topics such as compliancy, dislocation control, selective area growth, bonding methodologies, etc. are featured. It also addresses processing issues in the manufacturing of III-V and Si-based heterostructures for commercial products. Here, the success enjoyed by silicon germanium technology is contrasted by the promise of silicon-carbon alloys which have opportunities and challenges for the new generation of process developers.
Author: Glenn E. Beltz
Author: Glenn E. Beltz
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Author: S. J. Pearton
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Author: Susan M. Kauzlarich
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Author: S. A. Ringel