Download or read book Development of a Boron copper Neutron Absorber Composite written by T. C. Wiencek and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Boron copper Neutron Absorber Composite written by and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the fabrication of a new boron-copper neutron absorbing material that was developed to meet the upgrading needs of the Intense Pulsed Neutron Source (IPNS) at Argonne National Laboratory. To increase the intensity of the neutron beams from the IPNS, the target uranium was changed from depleted uranium to uranium enriched to 77.5% 235U. To keep the multiplication factor, k{sub eff} (number of fissions in one generation/number of fissions in preceding generation) at a safe level, a new neutron absorber material was needed. The previous materials, boral and cadmium, could not meet the new requirements and a search of the literature showed that no currently available material was acceptable. With previous powder metallurgy used as a base, the composite was fabricated with 43 vol. % 1°B (81% enriched 1°B) and the balance copper and voids. The powder metallurgy techniques was followed by hot-rolling the composite to a sheet. The material composed of boron particles dispersed in a pure copper matrix and clad with pure copper on both sides, exhibits the following properties: Loadings up to 43 vol. % boron, with the balance copper and voids. A loading of 0.5 x 10221°B atoms/cm2 in sections as thin as 0.067 in. (1.7 mm), with copper cladding as thin as 0.010 in. (0.25 mm). Formability to radii as small as 2.1 in. (53.3 mm). No observed reaction between boron and the copper matrix and cladding at temperatures up to 900°C for times as long as 7 h. Retains structural integrity at 900°C.

Download or read book Development of a Boron copper Neutron Absorber Composite written by and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the fabrication of a new boron-copper neutron absorbing material that was developed to meet the upgrading needs of the Intense Pulsed Neutron Source (IPNS) at Argonne National Laboratory. To increase the intensity of the neutron beams from the IPNS, the target uranium was changed from depleted uranium to uranium enriched to 77.5% 235U. To keep the multiplication factor, k{sub eff} (number of fissions in one generation/number of fissions in preceding generation) at a safe level, a new neutron absorber material was needed. The previous materials, boral and cadmium, could not meet the new requirements and a search of the literature showed that no currently available material was acceptable. With previous powder metallurgy used as a base, the composite was fabricated with 43 vol. % 1°B (81% enriched 1°B) and the balance copper and voids. The powder metallurgy techniques was followed by hot-rolling the composite to a sheet. The material composed of boron particles dispersed in a pure copper matrix and clad with pure copper on both sides, exhibits the following properties: Loadings up to 43 vol. % boron, with the balance copper and voids. A loading of 0.5 x 10221°B atoms/cm2 in sections as thin as 0.067 in. (1.7 mm), with copper cladding as thin as 0.010 in. (0.25 mm). Formability to radii as small as 2.1 in. (53.3 mm). No observed reaction between boron and the copper matrix and cladding at temperatures up to 900°C for times as long as 7 h. Retains structural integrity at 900°C.

Download or read book Micro and Nanostructured Composite Materials for Neutron Shielding Applications written by Sajith Thottathil Abdulrahman and published by Woodhead Publishing. This book was released on 2020-06-30 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro- and Nanostructured Composite Materials for Neutron Shielding Applications presents recent developments and future possibilities for neutron shielding materials. Emphasis is placed on the correlation between the morphology, shielding mechanisms, and other desired properties, including their mechanical and thermal properties. The effect of neutron absorbing fillers, including their size on final properties is also examined, as are recent advancements in preparation, characterization and simulation techniques. Written by specialists in their respective fields, this comprehensive resource will help professionals and students understand the fundamentals of neutron shielding, as well as the properties of micro- and nanopolymer-based composites, concrete materials, alloy materials and metal-ceramic composites. Provides an up-to-date understanding of the fundamentals of shielding mechanisms, morphology and material property correlations Covers a broad range of micro and nano composite materials for neutron shielding Discusses recent advances surrounding the synthesis and processing of nanostructures and nanocomposite materials

Download or read book Development of a B4C Al Cermet for Use as an Improved Structural Neutron Absorber written by CJ. Beidler and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: An aluminum and boron carbide cermet was evaluated for possible application as a neutron absorbing material where structural strength and rigidity will be required. The boron carbide/aluminum composite possessed unique continuous interconnected ceramic and metal phases. Traditional bocon containing neutron absorbing materials have relied upon dispersions of particles in metal or polymeric matrices. The dispersion of boron carbide particles placed restrictions on the B10 concentration, introduced areal inhomogeneities, and necessitated the use of cladding to achieve desired strength. Utilization of two continuous phases allowed for considerable strength properties without having to include cladding. Boron concentrations in excess of 60 v/o were obtained in the cermet, a level that only hot pressing could surpass. Also, the boron carbide particle distribution could be adjusted to optimize strength and/or improve homogeneity of B10 within the material.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1992-04 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-02 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fabrication Studies of Clad Copper Matrix Boride Dispersion Control Materials written by K. C. Antony and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fabrication of 304 stainless steel clad dispersions of various borides in a copper matrix was investigated. Boride concentration was between 7 and 30 volume percent. Two control rod geometries were considered: cylindrical rods and rectangular flat plates. Various methods of fabrication were applied including co-extrusion, braze-diffusion bonding, picture frame rolling, and rectangular tube rolling. The relative advantages and disadvantages of each method with respect to a particular set of design criteria are presented.

Download or read book Neutron Absorber Materials for Reactor Control written by U.S. Atomic Energy Commission. Division of Reactor Development and published by . This book was released on 1962 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography on Nuclear Reactor Fuel Reprocessing and Waste Disposal Hazards and protection written by T. F. Connolly and published by . This book was released on 1960 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Peaceful Uses of Atomic Energy written by and published by . This book was released on 1958 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Chemical Vapor Deposition written by Hugh O. Pierson and published by William Andrew. This book was released on 2012-12-02 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Chemical Vapor Deposition: Principles, Technology and Applications provides information pertinent to the fundamental aspects of chemical vapor deposition. This book discusses the applications of chemical vapor deposition, which is a relatively flexible technology that can accommodate many variations. Organized into 12 chapters, this book begins with an overview of the theoretical examination of the chemical vapor deposition process. This text then describes the major chemical reactions and reviews the chemical vapor deposition systems and equipment used in research and production. Other chapters consider the materials deposited by chemical vapor deposition. This book discusses as well the potential applications of chemical vapor deposition in semiconductors and electronics. The final chapter deals with ion implantation as a major process in the fabrication of semiconductors. This book is a valuable resource for scientists, engineers, and students. Production and marketing managers and suppliers of equipment, materials, and services will also find this book useful.

Download or read book Proceedings of the International Conference on the Peaceful Uses of Atomic Energy Properties of reactor materials written by and published by . This book was released on 1958 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings Properties of reactor materials written by and published by . This book was released on 1958 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.