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Tuesday, May 12, 2020 | History

2 edition of Fabrication and characterization of hot isostatically pressed MgO found in the catalog.

Fabrication and characterization of hot isostatically pressed MgO

M. H. Leipold

Fabrication and characterization of hot isostatically pressed MgO

by M. H. Leipold

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Published by Jet Propulsion Laboratory, California Institute of Technology in Pasadena .
Written in English

    Subjects:
  • Magnesium oxide.

  • Edition Notes

    Statement[by] M. H. Leipold [and] T. H. Nielsen.
    SeriesJPL technical report 32-1188
    ContributionsNielsen, T. H., joint author., United States. National Aeronautics and Space Administration.
    Classifications
    LC ClassificationsTP889 .L43
    The Physical Object
    Paginationiv, 6 p.
    ID Numbers
    Open LibraryOL5597053M
    LC Control Number68002787

    CiteScore: ℹ CiteScore: CiteScore measures the average citations received per document published in this title. CiteScore values are based on citation counts in a given year (e.g. ) to documents published in three previous calendar years (e.g. – 14), divided by the number of documents in these three previous years (e.g. – 14). Granules and their characterization Two types of commercial alumina granules were used as raw materials (DS31 and DS 90M, Taimei Chemical K. K., Japan). The size of the primary particles in both granules was ¯m as received from the supplier. DS31 contains an acrylic binder and DS 90M contains an acrylic binder and 50ppm MgO as a.

      Inert Ceramics: Zirconia, ZrO2• Fabrication: • Obtained from the mineral zircon • Addition of MgO, CaO, CeO, or Y2O3 stabilize tetragonal crystal structure (e.g. 97 mol%ZrO2 and 3 mol%Y2O3) • Usually hot-pressed or hot isostatically pressed• Applications: • orthopaedics: femoral head, artificial knee, bone screws and plates, favored. The elastic properties of polycrystalline as well as single crystal MgO have been measured extensively. New measurements on four hot-pressed magnesium oxide samples are presented and compared to existing data. Discrepancies are noted between the properties determined for the different polycrystalline MgO samples; the magnitude of these differences is as much as ±6% for the reported bulk by: 2.

    The present study is focussed on the oxidation behavior of nonoxide silicon-based ceramics. Various Si 3 N 4 and SiC ceramics were examined after long term oxidation tests (up to h) at °C in ambient air. The damage mechanisms were discussed on the basis of a comprehensive chemical and microstructural analysis of the materials after the oxidation by:   HOT-ISOSTATICALLY PRESSED(HIP) GLASS-CERAMICS PRESSABLE CERAMICS HEAT PRESSED GLASS CERAMICS Leucite reinforcedK2O – Al2O3 – 4 SiO2 IPS Empress,Finesse, Optimal,Cerpress Lithium Disilicate reinforcedSiO2 – LiO2 – P2O5 – ZrO2 IPS Empress II,OPC 3G HEAT PRESSED VENEERING CERAMICS IPS ZirPress,VitaPM9


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Fabrication and characterization of hot isostatically pressed MgO by M. H. Leipold Download PDF EPUB FB2

Isostatic hot‐pressing was used to fabricate solid MgO bodies of high purity (with respect to metallic impurities) to 90 to 95y0 density with high translucency and a grain size of approximately by: 6.

The technique of hot isostatic pressing was used to fabricate solid magnesium oxide, MgO, bodies of high purity with respect to metallic impurities to 90% to 95% density, with high translucency, and having a grain size of approximately p.

Fabrication and Characterization of Isostatically Hot‐Pressed MgO For a grain in a polycrystalline specimen to be able t o deform to an arbitrary shape, Taylor*pointed out that i t must have five independent slip systems.

Fabrication and characterization of isostatically hot-pressed MgO. By M. Leipold and T. Nielsen. Abstract.

Isostatic hot pressed magnesium oxide noting brucite and crack formation and reheating effect Topics: MATERIALS, NONMETALLIC Author: M. Leipold and T. Nielsen. Fabrication and characterization of hot isostatically pressed MgO.

Fabrication and characterization of hot isostatically pressed magnesium oxid Topics: MATERIALS, NONMETALLIC. Year: OAI identifier: oai: Author: M. Leipold and T. Nielsen. Fabrication and characterization of isostatically hot-pressed MgO.

Author(eng) Leipold, M. H.; Nielsen, T. Issue Date: Language: eng: Description: Isostatic hot pressed magnesium oxide noting brucite and crack formation and reheating effects: NASA Subject Category.

High Temperature Oxides, Magnesia, Alumina, Beryllia Ceramics: Fabrication, Characterization and Properties is the third part of a series of four books on high temperature oxides.

This text is divided into five chapters that deal with the research and technical advances in selected refractory oxides, such as magnesia, alumina, and beryllium Edition: 1. For fabrication of monolithic specimens, alumina-based composites with 5, 10, 15, 20 and 25 wt% of silicon carbide and wt% of titanium oxide hot pressed at °C under the pressure of Abstract: MgO ceramics with the purity higher than % have been fabricated by a hot-isostatic press (HIP) technique of hot-pressed MgO compacts using nanometer MgO powder with an average particle size of nm.

The densification and grain growth behavior of MgO. The effect of hot isostatically pressed (HIP) sintering on the microstructural property of alumina compacts fabricated by slip casting of a commercial alumina powder was experimentally investigated.

The Ti–6Al–4V components were fabricated by hot isostatic pressing from the prealloyed powders. • The microstructure of HIP parts was characterized with varying the HIP temperature and powders.

• The effect of microstructures on mechanical properties of HIP Ti–6Al–4V alloys were by: Microstructure and superconducting properties of hot isostatically pressed MgB2 T C Shields, K Kawano, D Holdom and J S Abell School of Metallurgy and Materials, University of Birmingham, Birmingham, B15 2TT, UK.

Abstract Bulk samples of MgB2 have been formed by hot isostatic pressing (HIPping) of commercial powder at MPa and °C. Hot Isostatic Pressing of Metal Powders J.J. Conway and F.J. Rizzo, Crucible Compaction Metals Introduction HOT ISOSTATIC PRESSING (HIP) is a process involving the use of high-pressure gas isostatically applied to a part or workpiece at an elevated temperature performed in a specially constructed pressure vessel.

When consolidating metal. NASA Technical Reports Server (NTRS) Fabrication and characterization of hot isostatically pressed MgO Item Preview. MgO ceramics with the purity higher than % have been fabricated by a hot-isostatic press (HIP) technique of hot-pressed MgO compacts using nanometer MgO powder with an average particle size of nm.

The densification and grain growth behavior of MgO compacts during HIP process were investigated. The results indicate that the high-purity MgO ceramic with an average grain size of Author: Miao Qin Chen, Jin Jiang He, Zhao Chong Ding, Xin He. Microstructural development of hot isostatically pressed Si3N4 with different amounts of MgO, pressed at MPa (scanning electron micrographs of etched microsections): (a) wt.% MgO; (b) wt.% MgO; (c) wt.% MgO; (d) wt.% MgO.

and 2(b)). At 3 wt.% MgO, typically rod- shaped elongated ~ grains have grown from the by: 6. Burdett, W. Barry, and Hookham, Ian D. "The Implementation of Hot Isostatically Pressed Powder Type L/L Pressure Boundary Components in a PWR Plant." Proceedings of the ASME Pressure Vessels and Piping Conference.

Volume 6: Materials and Fabrication, Parts A and B. Prague, Czech Republic. July 26–30, pp. : W. Barry Burdett, Ian D. Hookham. Microstructural characterization using scanning electron microscopy and scanning transmission electron microscopy (TEM/STEM) was carried out near the interface between the two AA alloys that were hot isostatically pressed (HIP) to clad Zr laminated U wt.% Mo metallic nuclear fuel.

The HIP-bonded AA–AA interface consisted of discontinuous layer of Mg2Si Cited by: 5. Characterization of Selective Laser Melted GRCop Fatigue Life of Selective Laser Melted and Hot Isostatically Pressed Ti-6Al-4v Absent of Surface Machining. Fabrication of a Liquid Rocket Combustion Chamber Liner of Advanced Copper Alloy GRCop via Formed Platelet Liner Technology.

Characterization of Bi-Sr-Ca-Cu-O superconducting materials by Raman spectroscopy (P.V. Huong et al.). Slip-cast hot isostatically pressed silicon nitride gas turbine components (R. Dillinger et al.). Interaction of ceramic cutting tools with nickel-based alloys (H.

Addhoum, D. Broussaud).Book Edition: 1. The microstructure and physical properties of new Y 2 O 3 and Al 2 O 3 oxide-doped silicon nitride ceramics fabricated by cold isostatic pressing and free sintering were investigated. The phase composition of produced material was also studied by X-ray diffraction at room and elevated by: The sources of impurities in ultrafine-grain ceramics, primarily anions, are discussed in relation to the surfaces of the fine powders from which these ceramics are produced.

Possible means of purification of such powders before and during further processing are presented, again with emphasis on the form and location of the impurities in the Author: M. H. Leipold, E. R. Blosser.JACerS is a leading source for top-quality basic science research and modeling spanning the diverse field of ceramic and glass materials science.