Download or read book Analytical Transmission Electron Microscopy Studies on Copper Alumina Interfaces written by Richard Y. Hashimoto and published by . This book was released on 1999-06-01 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: A diffusion bonded copper-alumina interface had been studied using energy dispersive x-ray spectroscopy (EDX) and electron energy loss spectroscopy (EELS). Investigations of polycrystalline alumina showed that silica, a common commercial impurity, was present at the triple junctions in the form of fine mullite crystals in a glassy, silicon rich phase. Silicon was also detected along the alumina grain boundaries near triple junctions. There was no observed diffusion of Cu into alumina or alumina into copper. TEM results indicated no interface phase in the these vacuum formed samples. EDX studies of the interfaces revealed that silicon was present in varying concentrations from 1.O at.% to 10.0 at.%. Using spatial difference, PEELS at the interface showed two distinct residuals: a coordination similar to an aluminosilicate for silicon rich areas and a coordination similar to a metal to metal coordination for low silicon regions. Comparison of the Si rich interface residual PEELS spectra to that of the alumina triple junction PEELS spectra showed that the interface had atomic environments similar to that of as aluminosilicate, such as mullite. The interface results suggest that Si segregation may contribute to the observed higher strength of the metal-ceramic composite by void filling and modified bond character.
Download or read book Scanning Transmission Electron Microscopy Studies of Interfaces Involving Yttrium Barium Copper Oxide written by Jean Ling Lee and published by . This book was released on 1996 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Microscopy and Analysis 1997 Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference University of Cambridge 2 5 September 1997 written by Rodenburg and published by CRC Press. This book was released on 1997-01-01 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron Microscopy and Analysis 1997 celebrates the centenary anniversary of the discovery of the electron by J.J. Thomson in Cambridge and the fiftieth anniversary of this distinguished Institute group. The book includes papers on the early history of electron microscopy (from P. Hawkes), the development of the scanning electron microscope at Cambridge (from K. Smith), electron energy loss spectroscopy (from L.M. Brown), imaging methods (from J. Spence), and the future of electron microscopy (from C. Humphreys). Covering a wide range of applications of advanced techniques, it discusses electron imaging, electron energy-loss and x-ray analysis, and scanning probe and electron beam microscopies. This volume is a handy reference for professionals using microscopes in all areas of physics, materials science, metallurgy, and surface science to gain an overview of developments in our understanding of materials microstructure and of advances in microscope interrogation techniques.
Download or read book Processing and Characterization of Alumina niobium Interfaces Produced Via Liquid film assisted Joining written by Joseph Thomas McKeown and published by . This book was released on 2003 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Microscopy and Analysis 1997 Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference University of Cambridge 2 5 September 1997 written by John M. Rodenburg and published by CRC Press. This book was released on 2022-01-27 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron Microscopy and Analysis 1997 celebrates the centenary anniversary of the discovery of the electron by J.J. Thomson in Cambridge and the fiftieth anniversary of this distinguished Institute group. The book includes papers on the early history of electron microscopy (from P. Hawkes), the development of the scanning electron microscope at Cambridge (from K. Smith), electron energy loss spectroscopy (from L.M. Brown), imaging methods (from J. Spence), and the future of electron microscopy (from C. Humphreys). Covering a wide range of applications of advanced techniques, it discusses electron imaging, electron energy-loss and x-ray analysis, and scanning probe and electron beam microscopies. This volume is a handy reference for professionals using microscopes in all areas of physics, materials science, metallurgy, and surface science to gain an overview of developments in our understanding of materials microstructure and of advances in microscope interrogation techniques.
Download or read book High Resolution Transmission Electron Microscopy of Metallic Film laser irradiated Alumina Couples written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A near-surface thin layer is melted when single crystal alumina (sapphire) is pulsed laser-irradiated in an Ar-4%H[sub 2] atmosphere.[gamma]-alumina grows epitaxially from the (0001) face of[alpha]-alumina (sapphire) during the rapid solidification of this layer that occurs once the laser pulse is over. Cross sectional high resolution transmission electron microscopy (HRTEM) reveals that the interface between unmelted sapphire and[gamma]-alumina is atomistically flat with steps of one to a few close-packed oxygen layers; however, pronounced lattice distortions exist in the resolidified[gamma]-alumina. HRTEM also is used to study the metal-ceramic interface of a copper film deposited on a laser-irradiated alumina substrate. The observed changes of the interfacial stricture relative to that of unexposed substrates are correlated with the strong enhancement of film-substrate bonding promoted by laser irradiation. HRTEM shows that a thin amorphous film is produced after irradiation of 99.6% polycrystalline alumina. Formation of a diffuse interface and atomic rearrangements that can take place in metastable phases contribute to enhance the bonding strength of copper to laser-irradiated alumina.
Download or read book Transmission Electron Microscopy Studies of Nucleation Growth and Interfaces in Ceramic Oxide Heterojunctions written by Lisa Anne Tietz and published by . This book was released on 1991 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Imaging and Spectrometry of Materials written by Frank Ernst and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characterisation of materials and material systems is an essential aspect of materials science. A few decades ago it became obvious that, because the properties of materials depend so critically on the microstructure of their components, this characterisation must be determined to the atomic level. This means that the position - as well as the nature - of individual atoms has to be determined at "critical" regions close to defects such as dislocations, interfaces, and surfaces. The great impact of advanced transmission electron microscopy (TEM) techniques became apparent in the area of semiconducting materials, where the nature of internal interfaces between silicon and the corresponding silicides could be identified, and the results used to enhance the understanding of the properties of the compounds studied. At that time, advanced TEM techniques existed predominantly in the US. However, advanced TEM instrumentation was not available in the ma terials science and solid-state science communities in Germany. This gap was bridged by the late Peter Haasen who, after a visit to the US, initiated a Priority Programme on Microstructural Characterisation at the Volkswagen Foundation (Hannover). The programme was in effect from 1985 to 1997 and supported a wide range of research projects - from fundamental, trendy, innovative projects to projects in applied materials science.
Download or read book Basic Science of Preparation Transmission Electron Microscopy and Modeling of Copper and Aluminum Targets written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research involves an effort to study and compare the residual microstructures and dynamic behavior of two metallic targets of finite thicknesses, namely OFHC (oxygen-free high-conductivity) copper and 7039 aluminum, subjected to ballistic impact and perforation by a tungsten heavy alloy (WHA) projectile. Also included in this work is an attempt to validate mathematical modelling of experimental results through the use of a computer hydrocode, AUTODYN-2D, which allows for the simulation of ballistic penetration/perforation events and possible differentiation of fundamental mechanisms through validation strategies. These targets represent two very different FCC materials. The 7039 aluminum is extremely hard in contrast to a softer, ductile copper. The "failure" mechanisms appear to be different on a macroscopic scale, but may be similar on a microscopic scale. A preliminary investigation of the residual penetration channels in these two targets revealed significant microstructural differences. In the 7039 aluminum target there is a limited extent of microstructural deformation seen through optical microscopy, though numerous shear bands are observed near the channel wall and at the spalled region. Observations of the OHFC target, on the other hand, show a narrow region of recrystallized grains adjacent to the crater wall, beyond which is an extensive area of microband clusters. Similar features have been observed previously in connection with hypervelocity impact cratering in copper.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Aluminum and Its Alloys Two Volume Set Print written by George E. Totten and published by CRC Press. This book was released on 2018-12-07 with total page 2957 pages. Available in PDF, EPUB and Kindle. Book excerpt: This encyclopedia, written by authoritative experts under the guidance of an international panel of key researchers from academia, national laboratories, and industry, is a comprehensive reference covering all major aspects of metallurgical science and engineering of aluminum and its alloys. Topics covered include extractive metallurgy, powder metallurgy (including processing), physical metallurgy, production engineering, corrosion engineering, thermal processing (processes such as metalworking and welding, heat treatment, rolling, casting, hot and cold forming), surface engineering and structure such as crystallography and metallography.
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1988 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Research of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1983 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interfacial Science in Ceramic Joining written by Alida Bellosi and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique combination of the basic science and fundamental aspects of joints and interfaces with the engineering aspects of the subject. Contributors include researchers drawn from several Eastern European countries. Topics addressed include processing, interfacial reactions, graded joints, residual stress measurement and analysis, and failure and deformation. Audience: Academic and industrial researchers and ceramic manufacturers interested in understanding the current state of the art in joining.
Download or read book Metals Abstracts written by and published by . This book was released on 1990 with total page 1342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
