The Inter Relationships Between The Static And Dynamic Mechanical Properties And The Microstructure Of Reaction Bonded Boron Carbide Composites
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The Inter Relationships Between The Static And Dynamic Mechanical Properties And The Microstructure Of Reaction Bonded Boron Carbide Composites
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Author : Shmuel Hayun
language : en
Publisher:
Release Date : 2009
The Inter Relationships Between The Static And Dynamic Mechanical Properties And The Microstructure Of Reaction Bonded Boron Carbide Composites written by Shmuel Hayun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Boron compounds categories.
Improvement Of The Mechanical Properties Of The Reaction Bonded Boron Carbide Composites By Using Multimodal Boron Carbide Powder Mixtures
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Author : Amir Weizman
language : en
Publisher:
Release Date : 2009
Improvement Of The Mechanical Properties Of The Reaction Bonded Boron Carbide Composites By Using Multimodal Boron Carbide Powder Mixtures written by Amir Weizman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Boron compounds categories.
Materials Science Of Carbides Nitrides And Borides
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Author : Yury G. Gogotsi
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Materials Science Of Carbides Nitrides And Borides written by Yury G. Gogotsi and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
A survey of current research on a wide range of carbide, nitride and boride materials, covering the general issues relevant to the development and characterisation of a variety of advanced materials. Topics include structure and electronic properties, modeling, processing, high-temperature chemistry, oxidation and corrosion, mechanical behaviour, manufacturing and applications. The volume complements more specialised books on specific materials as well as more general texts on ceramics or hard materials, presenting a survey of materials research as a key to technological development. After decades of research, the materials are being used in electronics, wear resistant, refractory and other applications, but numerous new applications are possible. Roughly equal numbers of papers cover theoretical and experimental research in the general field of materials science of refractory materials. Audience: Researchers and graduate students in materials science and engineering.
Mechanical Properties Of Particulate Reinforced Boron Carbide Composites
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Author : Lorenzo W. Hankla
language : en
Publisher:
Release Date : 2008
Mechanical Properties Of Particulate Reinforced Boron Carbide Composites written by Lorenzo W. Hankla and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
ABSTRACT: The mechanical properties of boron carbide 4C) with 10 and 20 vol% particulate inclusions of commercially available nano-sized alpha-phase silicon carbide (�ł-SiC) or micron-sized titanium diboride (TiB2) were investigated so as to produce a fine-grained material with high hardness, toughness, and overall strength in order to increase the effectiveness of B4C as a structural ceramic, whose use in the field has been limited because of the extreme brittle nature of the material. Full density sintering of the ceramics (+ [or] -99% theoretical) was completed using the novel Plasma Pressure Compaction (P2C℗ʼ) technique, which limited grain growth due to a reduced processing temperature and a significantly reduced consolidation time. The reinforced ceramic composites had particulate grains homogeneously distributed within the B4C matrix. X-ray diffraction patterns confirmed that the constituents did not interdiffuse. The four-point flexure strength for the monolithic B4C ceramic was found to be significantly larger than any recorded value found in scientific literature, and was most likely attributed to the fine-grained microstructure resulting from the P2C℗ʼ processing. The mechanical properties of the nano-sized �ł-SiC-B4C ceramics showed a slight increase in the Chevron-notched four-point bend fracture toughness due to the crack deflection toughening mechanism. A slight decrease in the Vickers microhardness and the static elastic modulus values were also observed. A significant increase in the fracture toughness as well as a slight increase in the microhardness and elastic modulus of the micron-sized TiB2-B4C materials was found. The toughening mechanism of this composite was attributed to the slight chemical bond between the B4C matrix and the ultra-small, ultra-tough TiB2 particulates, which forced a propagating crack to completely rip apart the TiB2 reinforcing particles. This cleaving nature resulted in significant amounts of energy being absorbed by the micron-sized particulates. It was concluded that the composite with 20 vol% TiB2 allowed for the largest gain in toughness because it possessed the largest number of ultra small, ultra tough particulate-cracktip interactions.
Comprehensive Nuclear Materials
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Author :
language : en
Publisher: Elsevier
Release Date : 2020-07-22
Comprehensive Nuclear Materials written by and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-22 with Science categories.
Materials in a nuclear environment are exposed to extreme conditions of radiation, temperature and/or corrosion, and in many cases the combination of these makes the material behavior very different from conventional materials. This is evident for the four major technological challenges the nuclear technology domain is facing currently: (i) long-term operation of existing Generation II nuclear power plants, (ii) the design of the next generation reactors (Generation IV), (iii) the construction of the ITER fusion reactor in Cadarache (France), (iv) and the intermediate and final disposal of nuclear waste. In order to address these challenges, engineers and designers need to know the properties of a wide variety of materials under these conditions and to understand the underlying processes affecting changes in their behavior, in order to assess their performance and to determine the limits of operation. Comprehensive Nuclear Materials, Second Edition, Seven Volume Set provides broad ranging, validated summaries of all the major topics in the field of nuclear material research for fission as well as fusion reactor systems. Attention is given to the fundamental scientific aspects of nuclear materials: fuel and structural materials for fission reactors, waste materials, and materials for fusion reactors. The articles are written at a level that allows undergraduate students to understand the material, while providing active researchers with a ready reference resource of information. Most of the chapters from the first Edition have been revised and updated and a significant number of new topics are covered in completely new material. During the ten years between the two editions, the challenge for applications of nuclear materials has been significantly impacted by world events, public awareness, and technological innovation. Materials play a key role as enablers of new technologies, and we trust that this new edition of Comprehensive Nuclear Materials has captured the key recent developments. Critically reviews the major classes and functions of materials, supporting the selection, assessment, validation and engineering of materials in extreme nuclear environments Comprehensive resource for up-to-date and authoritative information which is not always available elsewhere, even in journals Provides an in-depth treatment of materials modeling and simulation, with a specific focus on nuclear issues Serves as an excellent entry point for students and researchers new to the field
Heat Treatment Of Reaction Bonded Boron Carbide Composites Fabricated At Temperatures Lower Than 1000 C
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Author : Tal Ellert
language : en
Publisher:
Release Date : 2020
Heat Treatment Of Reaction Bonded Boron Carbide Composites Fabricated At Temperatures Lower Than 1000 C written by Tal Ellert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
In present study, two goals were set. First, to study the effect of the initial (i.e. the preinfiltration) parameters of the preforms before infiltration on the mechanical properties. The research was focused on understanding the effect of boron carbide particle size and green density of the preforms on mechanical properties. For the first time these major parameters were decupled, and the effect of each parameter was analyzed. The second goal is to investigate the effect of post infiltrating thermal treatment on mechanical properties of reaction bonded boron carbide (RBBC). This is possible due to B4C a prolonged interaction between boron carbide and infiltrating metal, which lead to the formation of additional ceramic phases, decreasing the fraction of the residual metal and so to improve mechanical properties.
Boron Carbide
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Author : Kolan Madhav Reddy
language : en
Publisher:
Release Date : 2020-04-04
Boron Carbide written by Kolan Madhav Reddy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-04 with categories.
Boron carbide is a superhard and lightweight ceramic material. As a result of these characteristics, it used as a protective component in bulletproof vests, tank armour and also has many other industrial applications (eg: tooling, abrasives). Research on boron carbide remains active given a long-standing challenge to understand its complex failure behavior in extreme environments owing to its unique microstructure and mechanical properties, where many current efforts are underway to improve its behavior through microstructure alteration via additives that form secondary phases, chemical doping, and altering the chemical composition of the boron-to-carbon ratio in the crystal structure. This book covers some of the key challenges involving boron carbide that are currently being studied by many materials scientists and ceramists. The authors who are active in this research field have prepared the chapters for this book and specific topics covered highlight the state-of-the art research in structure, processing, properties and applications. The organization of the book is designed to provide an easy understanding for students and professionals interested in advanced material for novel applications.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1996
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aeronautics categories.
Processing Structure Property Relationships Of Reactive Spark Plasma Sintered Boron Carbide Titanium Diboride Composites
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Author : Hunter Lide
language : en
Publisher:
Release Date : 2019
Processing Structure Property Relationships Of Reactive Spark Plasma Sintered Boron Carbide Titanium Diboride Composites written by Hunter Lide and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Sintering parameter effects on the microstructure of boron carbide and boron carbide/titanium diboride composites are investigated. The resulting microstructure and composition are characterized by scanning electron microscopy (SEM), x-ray microscopy (XRM) and x-ray diffraction (XRD). Starting powder size distribution effects on microstructure are present and effect the mechanical properties. Reactive spark plasma sintering introduces boron nitride (BN) intergranular films (IGF's) and their effects on fracture toughness, hardness and flexural strength are shown. Mechanical testing of Vickers hardness, 3-point bend and Chevron notch was done and the microstructural effects on the resulting mechanical properties are investigated.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1991
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Aeronautics categories.
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.