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Sunday, August 9, 2020 | History

3 edition of High-strength silicon carbides by hot isostatic pressing found in the catalog.

High-strength silicon carbides by hot isostatic pressing

Sunil Dutta

High-strength silicon carbides by hot isostatic pressing

by Sunil Dutta

  • 228 Want to read
  • 4 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Isostatic pressing.,
  • Silicon carbide.

  • Edition Notes

    Other titlesHigh strength silicon carbides by hot isostatic pressing.
    StatementSunil Dutta.
    SeriesNASA technical memorandum -- 101400.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15275881M

    Silicon Nitride. Silicon nitride, like Silicon Carbide, is also available in two main types, reaction bonded and sintered.. Silicon nitride ceramics are electrical insulators and are resistant to attack by many molten metals. With low thermal conductivity and excellent thermal shock resistance, silicon nitride ceramics are used in many RF heating applications where the material is in contact. Post-Sintering Hot Isostatic Pressing of Silicon Nitride Based Ceramics. Tanguy Rouxel, Jean-Francois Anger, Jean-Louis Besson, Paul Goursat. Pages High Strength HIPRBSN - An Optimization by Statistical Methods. Petra DÖtsch, Matthias Steiner, Jurgen Heinrich and was applied to the cemented carbide industry at the end of the s.

    Consolidation of refractory ceramics such as boron carbide (B4C) and silicon carbide (SiC) by conventional sintering techniques (pressure-less sintering, hot pressing, hot isostatic pressing etc.) can prove challenging due to the high temperatures required for sintering. Typically sintering additives are used in order to decrease sintering temperature, but at the sacrifice of purity. Cite this chapter as: Larker H. () Hot Isostatic Pressing of Shaped Silicon Nitride Parts. In: Timmerhaus K.D., Barber M.S. (eds) High-Pressure Science and Technology.

    A general method of manufacturing high strength ultrafine grained nanostructured carbon and carbide materials that combines densification of nanoparticles with heat treatments or other means of supplying energy to cause fusion of structures that interlink and weld the nanoparticles together. Coatings films, nanopaper, nanopaper laminates, fibers, and extended objects can be manufactured by. USA1 US12/, USA USA1 US A1 US A1 US A1 US A US A US A US A1 US A1 US A1 Authority US United States Prior art keywords component boron carbide furnace sintering hot isostatic Prior art date Legal status (The .


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High-strength silicon carbides by hot isostatic pressing by Sunil Dutta Download PDF EPUB FB2

Dutta16 successfully ob- tained high-strength silicon carbide ceramics with the addition of boron and carbon by hot isostatic pressing using a refractory metal encapsulation, and investigated the influences of HIPing temperature and soaking time on density, microstructure, flexural strength and fracture by:   Hot isostatic pressing (HIP) was used for producing alpha and beta silicon carbide (SiC) bodies with near-theoretical density, ultrafine grain size, and high strength at processing temperatures of to C.

The HIPed materials exhibited ultrafine grain size. Furthermore, no phase transformation from beta to alpha was observed in HIPed. Hot isostatic pressing (HIP) was used for producing alpha and beta silicon carbide (SiC) bodies with near-theoretical density, ultrafine grain size, and high strength at processing temperatures of to C.

The HIPed materials exhibited ultrafine grain size. Furthermore, no phase transformation from beta to alpha was observed in HIPed.

Silicon carbide (SiC) based ceramic composites with improved fracture toughness and increased flexure strength have been developed by incorporating some other non-oxide and oxide particles or some whiskers and fibers. Hot-Isostatic Pressing (HIP) has been identified as an important technology for strengthening carbide by surface modification.

Hot isostatic pressing (HIP) was used for producing alpha and beta silicon carbide (SiC) bodies with near-theoretical density, ultrafine grain size, and high strength at processing temperatures of to C.

The HIPed materials exhibited ultrafine grain size. Furthermore, no phase transformation from beta to alpha was observed in HIPed Author: Sunil Dutta. High-Strength Silicon Carbides by Hot Isostatic Pressing p Alumina-SiC Composites from Kaolinite-Carbon Precursors by Hot Pressing.

Surface strengthening of SiC by in situ surface nitridation during post‐hot isostatic pressing (post‐HIPing) in N 2 was investigated. The formation of a thin (5–15 μm) layer of submicrometer β‐Si 3 N 4 on the surface of SiC was obtained at °C and MPa.

While SiC HIPed in Ar attained a mean bending strength of MPa, a significant increase in strength (with a maximum. Isostatic pressing.

In some pressing operations, such as hot isostatic pressing (HIP) compact formation and sintering occur simultaneously. This procedure, together with explosion-driven compressive techniques is used extensively in the production of high-temperature and high-strength parts such as turbine disks for jet engines.

Compression Deformation Mechanism of Silicon Carbide: I, Fine‐Grained Boron‐ and Carbon‐Doped β‐Silicon Carbide Fabricated by Hot Isostatic Pressing Yutaka Shinoda Center for Materials Design, Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama ‐, Japan.

Get this from a library. High-strength silicon carbides by hot isostatic pressing. [Sunil Dutta; United States. National Aeronautics and Space Administration.].

Manufacturing Silicon Carbide Microrotors by Reactive Hot Isostatic Pressing within Micromachined Silicon Molds Jing‐Feng Li Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai ‐, Japan.

In the present work, SiC powder compacts were densified by hot isostatic pressing using a special glass tube, and the effects of various additives such as Al, A, AlN and B4C on the densification and microstructure of hot isostatically pressed silicon carbide. After hot isostatic pressing processed, the carbides were mostly dissolved into matrix, the shape of carbides was changed from coarse and long rods to fine ellipsoid particulates.

Besides, the carbon in solid solution is speculated to have the effect on the refinement of α 2 phase. Comprehensive Hard Materials deals with the production, uses and properties of the carbides, nitrides and borides of these metals and those of titanium, as well as tools of ceramics, the superhard boron nitrides and diamond and related compounds.

Articles include the technologies of powder production (including their precursor materials), milling, granulation, cold and hot compaction. The invention is substantially pore-free shaped articles which consist essentially of polycrystalline α- or β-silicon carbide in the form of a single-phase homogeneous microstructure having grain sizes not exceeding 8 μm, and which are manufactured from SiC powder, without the concomitant use of sintering aides, by isostatic hot-pressing in a vacuum-tight casing at temperatures of from.

The invention relates to practically non-porous moldings which consist of polycrystalline α- and / or β-silicon carbide in the form of a single-phase homogeneous microstructure with particle sizes of a maximum of 8 μm and which are closed from pure SiC powder without the use of sintering aids by hot isostatic pressing in a vacuum-tight manner Shell have been produced at temperatures of.

1. Introduction. Silicon carbide (SiC) is thought to be a promising candidate material for semiconductor production equipment parts, optical mirror devices in space and fusion reactor structural applications, because of high thermal and chemical stability, low density, high stiffness, high hardness, high thermal conductivity and low activation.

Post-Sintering Hot Isostatic Pressing of Silicon Nitride Based Ceramics. Pages Rouxel, Tanguy (et al.) Preview Buy Chap19 € High Strength HIPRBSN - An Optimization by Statistical Methods. Pages DÖtsch, Petra (et al.) Preview Buy Chap19 Book Title Hot Isostatic Pressing— Theory and Applications.

As a result of experimental studies was found that to the initial surface of the ceramic material based on silicon carbide after hot isostatic pressing and diamond grinding the mean value of the coefficient of friction at a load of 1 N wasand after the pulsed-periodic laser treatment decreased by 7% to When open porosity of as little as % persisted after sintering, hot isostatic pressing increased the bulk density, but little or no increase in strength was realized.

Two‐parameter Weibull analysis of the strength data was used to quantify the strength improvement obtained following hot isostatic pressing. hot pressed silicon carbide overview. Hot pressing, also called pressure assisted densification, a ceramic significantly decreases the defects in the grain structure.

This gives hot pressed silicon carbide an extremely hard surface and high-strength which is utilized in ballistic armor. “Students or working professionals interested in SiC technology will find this book worth reading.” (IEEE Electrical Insulation Magazine, 1 November )“If you have any interest in the now emerging SiC semiconductor devices, this book covers it all and in sufficient depth to answer questions that might arise from process engineers, device modelers, or power - circuits and systems Reviews: 5.hot isostatic pressing of silicon nitride and silicon carbide in nitrogen produces structural ceramics with strength more than 20% above normal hot pressed structures.

the mechanism of strengthening by this method is not understood. examination of the structure of .