3 edition of Flaw imaging and ultrasonic techniques for characterizing sintered silicon carbide found in the catalog.
Flaw imaging and ultrasonic techniques for characterizing sintered silicon carbide
1987 by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English
|Statement||George Y. Baaklini and Phillip B. Abel.|
|Series||NASA technical memorandum -- 100177.|
|Contributions||Abel, Phillip Benjamin., United States. National Aeronautics and Space Administration.|
|The Physical Object|
HIGH-TEMPERATURE EFFECT OF HYDROGEN ON SINTERED ALPHA-SILICON CARBIDE Gary W. Hallum and Thomas P. Herbell National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio ABSTRACT ' Sintered alpha-silicon carbide was exposed to pure, dry hydrogen at highCited by: 1. We offer two different sizes of Boron Carbide Sintering Aid Powders. These powders are used as a sinter aid for making Silicon Carbide (SiC) sintered ceramics. These Boron Carbide additives aid in the sintering process by removing oxygen and is typically used as 1- 2% by weight (not volume). ~ Micron nanoparticle. The Designer’s Guide to Tungsten Carbide This publication is a reference guide for designers, engineers, fabricators and end users of tungsten carbide material. It is a compilation of recommendations derived from practical experience, theoretical stress analysis, proven application engineering practices and modern manufacturing by: 5. Some specific topics include oxide fiber-reinforced composites for gas turbine applications, the porous microstructure of yakbone bioceramic, properties and microstructure of CNT/AlN ceramics, and the effect of microstructure on the removal mechanisms of solid state sintered silicon carbide in polishing procedures.
powders, that contain additives such as born carbide, silicon, and aluminum silicate. Additionally those processes are often completed with adjacent infiltration or nitridation. There is a number of reports on multi-step techniques for selective laser sintering of silicon carbide bodies .
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FLAN IMAGING AND ULTRASONIC TECHNIQUES FOR CHARACTERIZING SINTERED SILICON CARBIDE George Y. Baaklini Cleveland State University Cleveland, Ohio and Phillip B. Abel National Aeronautics and Space Administration Lewi s Research Center 35 ABSTRACT This investigation assessed the capabilities of projection microfocus x-radiography, ultrasonic velocity.
The capabilities were investigated of projection microfocus x-radiography, ultrasonic velocity and attenuation, and reflection scanning acoustic microscopy for characterizing silicon carbide specimens. Silicon carbide batches covered a range of densities and different microstructural characteristics.
Room temperature, four point flexural strength tests were conducted. Author: Phillip B. Abel and George Y. Baaklini. Get this from a library. Flaw imaging and ultrasonic techniques for characterizing sintered silicon carbide book Flaw imaging and ultrasonic techniques for characterizing sintered silicon carbide.
[George Y Baaklini; Phillip Benjamin Abel; United States. National Aeronautics and Space Administration.]. In this study, laser treatment of sintered SiC surfaces is carried out to enhance the surface hydrophobicity. Morphological and metallurgical changes of the treated surfaces are evaluated using optical and scanning electron microscopy, energy dispersive spectroscopy, and x-ray diffraction (XRD).Cited by: 3.
Specimens of sintered silicon nitride and sintered silicon carbide, seeded with surface voids, were examined by SLAM at an ultrasonic frequency of MHz in. Scaling up the Single Transducer Thickness-Independent Ultrasonic Imaging Method for Accurate Characterization of Microstructural Gradients in Monolithic and Composite Tubular Structures Article.
Ultrasonic time-of-flight (TOF) is investigated as a predictor of density variation across reaction-sintered silicon carbide (SiC) ceramics. The importance of this research is heightened by the.
The silicon carbide powders and the sintering additives were ultrasonically dispersed in an alcoholic solution of the resin.
After evaporation of the solvent and milling, the powders were cold compacted at a pressure of MPa into pellets of Cited by: Flaw detection techniques for monolithic and toughened ceramics depend on investigations that will establish statistical foundations for probability-of-detection of various types of defects over a Author: Alex Vary.
The state-of-the-art of ultrasonic methods is reviewed with reference to the basic measurements, signal acquisition and processing, strength property Author: Alex Vary.
Silicon Carbide. Sintered silicon Carbide (SiC) and reaction bonded silicon carbide combine excellent corrosion resistance with extreme hardness and high thermal conductivity. Silicon carbide probably has the best resistance to corrosion in acids and alkalis of all advanced ceramic materials.
Sintering behavior and sintering techniques of silicon carbide are reviewed. Work on sintering experiments with silicon carbide containing B-C and Al-B-C is referred to.
First, the driving energy of sintering, the non-sinterability of silicon carbide powder, and the role of additives are explained by the free energy theory of mass by: Mechanical characteristics of microwave sintered silicon carbide S MANDAL, A SEAL, S K DALUI, A K DEY, S GHATAK and A K MUKHOPADHYAY* Central Glass and Ceramic Research Institute, KolkataIndia A bstract.
The present work deals with the sintering of SiC with a low melting additive by microwave tec h nique. Production process of of pressureless sintered silicon carbide (SSIC) seal rings.
Production process of of pressureless sintered silicon carbide (SSIC) seal rings of pressureless sintered. Abstract. In Japan we have two government projects for the resolution of the energy problem. The Sunshine Project was started in The purpose of this project is to develop production technology for new energy sources such as solar, geothermal, coal gasification and liquefaction, and utilization of hydrogen for energy by: Home» Sintered SIC Ceramics Sintered SIC Ceramics.
silicon carbide bulletproof ceramic. this kind of silicon carbide bricks is made of super fine sintered silicon carbide powder with excellent thermal conductivity, high temperature resistant, high temperature resistant to oxidation, corrosion resistance, acid and alkali, solvent and other.
() Self-Sintered Silicon Carbide. In: Wang Q.J., Chung YW. (eds) Encyclopedia of Tribology. Springer, Boston, Search book. Search within book. Type for suggestions. Table of contents Previous. Page Navigate to page. Silicon carbide (SiC) ceramic with YAG (Y 3 Al 5 O 12) additive added by sol-gel method was liquid-phase sintered at different sintering temperatures, and the sintering mechanism and microstructural characteristics of resulting silicon carbide ceramics were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and elemental Cited by: Blasch Ultron™ Sintered Silicon Carbide (SSiC) is produced using very fine silicon carbide powder containing sintering additives.
It is processed using forming methods typical for other ceramics and sintered at 2,°C in an inert gas atmosphere. Sintered alpha silicon carbide (SiC) is produced by initially mixing fine (sub-micron) and pure silicon carbide powder with non-oxide sintering aids. The powdered material is formed or compacted by using most of the conventional ceramic forming processes such as die pressing, isostatic pressing and injection moulding.
About. We are in shanghai in china,specializing in designing and supplying Silicon Carbide Ceramic,such as sintered silicon carbide ceramic,reaction bonded silicon carbide encourage you to discuss your project with us early to avoid difficult problems will specify benefits of each material and discuss various processing techniques which is suitable.
to silicon carbide for many appli-cations involving clean and dirty fluids. New product and industry standard developments during the last 10 years have clearly shown a trend toward more use of silicon carbide because of its greater versa-tility with respect to corrosion, abrasion, and erosion resistance, as well as its lower sensitivity to face Size: KB.
In this study, ECM phenomena of sintered carbide are investigated. The previous study has shown that sintered carbide which is a composite body of WC and Co can be machined by ECM at high speed. However, many problems remained to be Cited by: 2. A dense, self-sintered silicon carbide/carbon-graphite composite material and a process for producing the composite material.
The composite material includes a silicon carbide matrix, between 2 and 30 percent by weight carbon-graphite, and small amounts of sintering aids such as boron and free carbon.
The silicon carbide has an average grain size between 2 and 15 μm, Cited by: Sintered Silicon Carbide (SSiC) is produced using very fine SiC powder containing sintering additives. It is processed using forming methods typical for other ceramics and sintered at 2, to 2,° C in an inert gas atmosphere.
It is Silicon Carbide ceramics with higher performance. Introduction. In order to obtain dense single-phase sintered bodies of silicon carbide it is necessary to activate the SiC powder with small amounts of boron and role played by both additives in the sintering process has not been fully clarified so by: Alpha Sintered Silicon Carbide.
AlphaLAST is a pressureless, alpha sintered silicon carbide. Made from a fine uniform grain structure and no free silica, it is a workhorse for corrosion and wear resistance.
Superior performance in sealing and dynamic applications; World-class technology for extremely uniform fine grains; Superior hardness and.
Reaction-sintered silicon carbide (RS-SiC) is a promising optical material for the space telescope systems. Anodically oxidation-assisted polishing is a method to machine RS-SiC. The electrolyte used in this study is a mixture of hydrogen peroxide (H 2 O 2) and hydrochloric acid (HCl), and the oxidation potential has two modes: constant Cited by: 4.
Sintered Silicon Carbide Sintered silicon carbide is the other com-mon type and the most widely used today as a hard face material. Sintered silicon carbide is produced from pure silicon carbide powder with non-oxide sintering aids. It is a homogeneous form of sil-icon carbide that does not contain any free sil-icon.
It also has an impervious File Size: KB. Role of Carbon in the Sintering of Boron-Doped Silicon Carbide Hot-spots generation, exaggerated grain growth and mechanical performance of silicon carbide bulks consolidated by flash spark plasma microstructure and mechanical properties of spark plasma sintered silicon carbide processed with β-silicon carbide nanopowder and.
That’s our tradename for our Sintered Alpha Silicon Carbide. CALSIC S is a single phase material containing greater than 99% silicon carbide. Sintered SiC is a self-bonded material containing a sintering aid (typically Boron) of less than 1% by weight. of sintered silicon carbide in the market.
The microstructure and excellent physical properties of 3M™ Silicon Carbide allow these materials to withstand some of the most demanding conditions in a wide variety of industries.
Components made of 3M silicon carbide have an excellent track record over decades of use, and applications for theseFile Size: KB. Nitride bonded silicon carbide (NSIC) Analogue Analogue to RSIC this is also an open porous material with approx. 12 to 15% porosity.
During a nitride process in which non-shrinking components are able to be manufactured, a green body made of SIC is nitrided in a nitrogenous atmosphere at °C. 11 October The effect of diamond powder characteristics on lapping of sintered silicon sintered Silicon Carbide has been used in applications such as seal pump faces.
Benjamin Rosczyk, Eric Burkam, Artem Titov, Clement Onyenemezu, and Ion C. Benea "The effect of diamond powder characteristics on lapping of sintered silicon carbide Cited by: 1. 1. Introduction. Reaction-sintered silicon carbide (RS-SiC) has been considered as an ideal mirror material for space telescope systems and a promising ceramic material for the molds of glass lens, 1, 2 as it has the excellent mechanical and chemical properties of a low thermal expansion coefficient, high thermal conductivity, high radiation resistance, high Cited by: 7.
Journal of Electronic Imaging Journal of Medical Imaging Journal of Micro/Nanolithography, MEMS, and MOEMS Ultrasonic NDE of silicon carbide lightweight systems. NTSIC (new technology silicon carbide): evaluation of microstructure of high-strength reaction-sintered silicon carbide for optical mirror.
Shoko Suyama. ULTRASONIC NDE OF STRUCTURAL CERAMICS FOR POWER AND PROPULSION SYSTEMS Alex Vary, Edward R. Generazio, I imaging techniques, microstructure characterization by analytical ultrasonics Pulse-echo measurements were made on a series of sintered silicon carbide MOR bars that were fabricated with deliberately varied.
The brittle failure of ceramics under stress from small defects make flaw detection highly important. Because ceramics such as silicon nitride and silicon carbide have critical flaw size, an order of magnitude smaller than metals, testing methods adequate for metals may not be appropriate for ceramic by: 1.
REACTION-SINTERED SILICON CARBIDE Kazuya Yamamura, Masaki Ueda, Tatsuya Takiguchi, and Nobuyuki Zettsu Research Center for Ultra-precision Science and Technology Graduate School of Engineering, Osaka University Suita, Osaka, Japan INTRODUCTION Reaction-sintered silicon carbide (RS-SiC) is a promising material for mirror of next-generationFile Size: KB.
Journal of Electronic Imaging Journal of Medical Imaging Journal of Micro/Nanolithography, MEMS, and MOEMS A general overview of some Nondestructive Evaluation (NDE) techniques for materials characterization. Kenderian; NDE methods for determining the materials properties of silicon carbide plates.
Shant Kenderian. KYLIN (KY SEALS) is currently selling Mechanical Seals (Elastomer Bellow Mechanical Seals, O-Ring Mechanical Seals, PTFE Wedge Mechanical Seals, Teflon Bellow Mechanical Seals, Metal Bellow Mechanical Seals, Cartridge Mechanical Seals, etc), Seal Faces (Silicon Carbide Seal Faces (Reaction Bonded Silicon Carbide, Sintered Silicon Carbide, Sintered Silicon Carbide .Silicon carbide is an industrial ceramic used for many applications.
Due to its complicated crystal structure, many different types exist and can be made to have a “core-rim” microstructure in individual grains. In this work, SiC samples were processed via a co-precipitation and spark plasma sintered to examine the core-rim microstructure.Sintered silicon carbide/graphite/carbon composite ceramic body having a homogeneous fine grain microstructure with at least 50 percent of its silicon carbide grains having a size not exceeding about 8 microns and an aspect ratio less than about 3, with graphite grains having an average size not exceeding that of the silicon carbide grains microns uniformly dispersed Cited by: