Download or read book Impact of Heat Treatment and Oxidation of Carbon carbon Composites on Microstructure and Physical Properties written by Sardar Sarwat Iqbal and published by . This book was released on 2011 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon-carbon (C/C) composites are notable among engineering materials in aerospace and defense industries possessing excellent specific mechanical, thermal, frictional and wear properties. C/C maintain their properties at temperatures where most of the high end alloys give in, and maintain their dimensional stability at temperatures above 2000 °C. C/C is frequently used in aircraft and automotive industries as brake materials. However, frictional performance is dependent on various parameters: microstructure, fiber type, fiber orientation distribution, fiber/matrix interfacial bond, heat treatment, and oxidation. The present study in dissertation provides an insight into the impact of heat treatment, and oxidation on microstructure, mechanical and thermal properties. The study demonstrated a highly inhomogeneous nature of C/C, and sample size is a very important parameter in governing mechanical properties. Since, the slightest change in the dimension of samples could bring about a radically different outcome in terms of mechanical properties, and can hardly be representative of the bulk properties. Therefore, in order to obtain a good estimate of the bulk properties, the sample size must be comparable to the bulk material. The research nonetheless showed the impact of sample size in estimating the mechanical properties of bulk properties, which are highly significant after statistical analysis, and, therefore, it must be taken into account to understand the processing-structure-property-analysis relationships.

Download or read book Carbon Reinforcements and Carbon Carbon Composites written by Erich Fitzer and published by Springer Science & Business Media. This book was released on 1998 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon has been used as the most successful reinforcement for materials like glass, ceramics, metals and polymers. Carbon/carbon composites are used when extreme temperature conditions prevail. The authors give a comprehensive overview of the present status in this field as well as projections for new "high tech" materials.

Download or read book Engineered Materials Handbook Desk Edition written by ASM International. Handbook Committee and published by ASM International. This book was released on 1995-11-01 with total page 1313 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference on the properties, selection, processing, and applications of the most widely used nonmetallic engineering materials. Section 1, General Information and Data, contains information applicable both to polymers and to ceramics and glasses. It includes an illustrated glossary, a collection of engineering tables and data, and a guide to materials selection. Sections 2 through 7 focus on polymeric materials--plastics, elastomers, polymer-matrix composites, adhesives, and sealants--with the information largely updated and expanded from the first three volumes of the Engineered Materials Handbook. Ceramics and glasses are covered in Sections 8 through 12, also with updated and expanded information. Annotation copyright by Book News, Inc., Portland, OR

Download or read book The Influence of Heat Treatment of the Matrix on the Physical Properties of Carbon Carbon Composites written by and published by . This book was released on 1986 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of heat treatment on carbon-carbon composites have been studied on small composite samples by the use of X-ray diffraction, microstructural analysis (optical and scanning electron microscopy), density measurements, and sonic resonance for determining modulus. Modulus values for small samples of three-dimensional composites give good agreement with rule of mixtures estimates when the actual fiber volume fraction of the small sample is used. Heat treatment of pyrolyzed two-dimensional laminates shows initially a drastic in drop in modulus, corresponding to pyrolysis, decreasing density, and increasing porosity. In the graphitization temperature range, however, some increases are seen in modulus, accompanied by decreasing graphite c-spacing and increasing graphitization. Microstructural examination also shows evidence of increasing graphitization of the matrix, accompanying the increase of stiffness. Keywords: Carbon-carbon Composites, Carbon fiber, Dynamic modulus, Heat treatment.

Download or read book Carbon Carbon Composites written by Gary Savage and published by Springer Science & Business Media. This book was released on 1993 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon is a material around which a whole branch of science has developed. This book introduces carbon-carbon materials with respect to their relationship to other carbon materials. Each of the major production methods is covered and a chapter is devoted to the susceptibility to oxidation.

Download or read book Essentials of Carbon carbon Composites written by Colin R. Thomas and published by . This book was released on 1993 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aimed at graduate and post-graduate level, this book aims to give a balanced and up-to-date picture of UK interests in carbon-carbon composite materials.

Download or read book Effects of Heat Treatment on Microstructure and Flexural Properties of Unidirectional Carbon Carbon Composites written by Glen A. Binegar and published by . This book was released on 1989 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructure and mechanical behavior of two unidirectional carbon -carbon (C-C) composite systems have been studied and correlated with their processing schedules. The composites were made with AMOCO T-50 PAN-based carbon fiber and one of two different carbon matrix precursors. The matrices are a state-of-the-art phenol-formaldehyde resin and a polyarylacetylene (PAA) resin obtained from cyclotrimerization of diethynyl benzene. The PAA resins have desirable properties as carbon precursors for C-C composites. The PAA matrix has a high carbon yield of 90% and exhibits less shrinkage during carbonization than the phenolic resin. The cyclotrimerized prepolymer also has good processing characteristics because of the molecular weight increase and reduced enthalpy of polymerization that result from the cyclotrimerization process. Analyses of scanning electron microscope micrographs revealed the appearance of anisotropic structure at heat treatment greater than or equal to 2400C. The development of this anisotropic structure appears to progress from an initially isotropic texture at 1200 and 1800 C to a graphite-like lamellar anisotropic structure at 2400 C and higher. This anisotropic structure is more pronounced in the PAA-derived matrix. The PAA-derived C-C composites exhibited a change in mode of three-point bend failure at heat treatments of 1800, 2400, and 2800 C. The failure of the 1200 C composites occurred by catastrophic fracture initiating at the tensile face above the loading bar. The other C-C composites failed more gracefully by a combination of accumulated damage due to bearing on the load bar, longitudinal shear, and isolated tensile failures. Keywords: Carbon carbon composites. (kr).

Download or read book Design and Control of Structure of Advanced Carbon Materials for Enhanced Performance written by Brian Rand and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon is unique in the range of structures and properties that are displayed by its material forms. The bonds in diamond, within the plane ofgraphite and in the fullerene molecules, C , are the strongest covalent bonds possible. This strong covalent bonding 60 leads to some exceptional intrinsic properties, examples ofwhich are: the greatest Young's modulus (in diamond, within the graphite plane and in single walled nanotubes) the highest room temperature thermal conductivity (in diamond and within the graphite plane) high hole mobility in doped diamond exceptional thermal stability ofthe structure in graphite It is because of the extreme thermal stability that such a wide range of materials is available. Atomic mobilities are low at all but the highest temperatures. Sintering, melting and casting ofcarbon are not feasible processing operations and carbon/graphite components are exclusively produced from the pyrolytic decomposition of organic precursors. The vast majority of engineering carbons have Sp2 type bonding and are related in some way to the structure of graphite. In the c-direction the bonding in graphite is of van der Waals character with the result that graphite is highly anisotropic in its properties and is probably unique in showing both the highest and lowest bond strengths in different directions in the same crystal.

Download or read book The Effect of Heat Treatment Upon the Physical Properties and the Microstructure of Medium Carbon Steel written by Robert Gorham Morse and published by . This book was released on 1899 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carbon Fibers and Their Composites written by Peter Morgan and published by CRC Press. This book was released on 2005-05-20 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most literature pertaining to carbon fibers is of a theoretical nature. Carbon Fibers and their Composites offers a comprehensive look at the specific manufacturing of carbon fibers and graphite fibers into the growing surge of diverse applications that include flameproof materials, protective coatings, biomedical and prosthetics application

Download or read book Effect of Heat Treatment on Thermal Properties of Pitch Based and Pan Based Carbon Carbon Composites written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal properties of two directional (2D) pitch-based carbon fiber with charred resin and three directional (3D) PAN-based carbon fiber with CVI carbon matrix C/C composite were investigated for non-heat treated (NHT) and heat treated (HT) materials through the thickness (z-direction). Heat treatment was performed at 1800, 2100 and 2400 oC for 1-hr in inert argon atmosphere. Thermal diffusivity, heat capacity and bulk density were measured to calculate thermal conductivity. Thermal diffusivity and conductivity was the highest for 3D C/C heat treated at maximum temperature with non-heat treated one exhibiting the lowest one. Similarly, 2D C/C heat treated at maximum temperature exhibited the highest thermal diffusivity and thermal conductivity. Polarized light microscopy (PLM) images of HTT C/C show a progressive improvement in microstructure when compared to NHT C/C. However, HTT 2D and 3D C/C composites exhibited extensive shrinkage of charred resin and CVI carbon matrix, respectively, from fibers resulting in intra and inter-bundles cracking when compared to NHT one. Raman spectroscopy and XRD results of NHT and HTT C/C indicated increased ordering of structure. A progressive improvement in thermal properties was observed with increased heat treatment temperatures.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carbon Fibers written by Soo-Jin Park and published by Springer. This book was released on 2018-05-30 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The updated and expanded second edition of this book explores the physical and mechanical properties of carbon fibers and their composites, their manufacture and processing, and their current and emerging applications. Over 10 chapters, the book describes manufacturing methods, surface treatment, composite interfaces, and microstructure-property relationships with underlying fundamental physical and mechanical principles. It discusses the application of carbon materials in delivering improved performance across a diverse range of fields including sports, wind energy, oil and gas, infrastructure, defence, and the aerospace, automotive and semiconductor industries. This new edition introduces chapters related to the manufacturing of carbon/carbon composites (C/C composites), antioxidation characteristics of C/C composites, and their applications. Furthermore, it addresses the effect of graphene and carbon nanotubes on the physical and chemical properties of carbon fibers. A final chapter looks at the emerging and future prospects for carbon fiber technology.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Aluminides and Intermetallics written by S.H. Whang and published by Elsevier. This book was released on 2013-10-22 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of proceedings is concerned with an increasingly important area, that of intermetallics and high temperature aluminides, which has recently been attracting a great deal of attention. Nearly 150 papers presented at the meeting held in San Diego in September 1991 are reproduced here. They cover a wide range of related topics such as the bonding characteristic and alloying behaviour of TiA1 intermetallic compounds and the cleavage fracture of ordered intermetallic alloys. All the papers have been reviewed according to the standards set by Materials Science and Engineering. This book will be of interest to metallurgists and materials scientists working with composites who are interested in the latest developments in this fast–moving field.

Download or read book Ei Engineering Conference Index pt 1 Civil environmental and geological engineering written by and published by . This book was released on 1985 with total page 1412 pages. Available in PDF, EPUB and Kindle. Book excerpt: