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Thursday, May 7, 2020 | History

3 edition of Effects of HF treatments on tensile strength of hi-nicalon fibers found in the catalog.

Effects of HF treatments on tensile strength of hi-nicalon fibers

Narottam P. Bansal

Effects of HF treatments on tensile strength of hi-nicalon fibers

by Narottam P. Bansal

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  • 40 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], Springfield, VA .
Written in

    Subjects:
  • Tensile strength.,
  • Silicon carbides.,
  • Coatings.,
  • Microstructure.,
  • Weibull density functions.

  • Edition Notes

    StatementNarottam P. Bansal.
    SeriesNASA/TM -- 1998-206626., NASA technical memorandum -- 206626.
    ContributionsLewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15541781M


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Effects of HF treatments on tensile strength of hi-nicalon fibers by Narottam P. Bansal Download PDF EPUB FB2

Get this from a library. Effects of HF treatments on tensile strength of hi-nicalon fibers. [Narottam P Bansal; Lewis Research Center.]. High temperature tensile properties of unidirectional BN/SiC-coated Hi-Nicalon SiC fiber reinforced celsian matrix composites have been measured from room temperature to C ( F) in air.

To clarify the effects of reduced pressure on the thermal stability of polycarbosilane-derived SiC fibers (Nicalon, Hi-Nicalon and Hi-Nicalon S), the heat-treatments were conducted at and. The properties of interest include thermal-elastic, ultimate tensile strength and interlaminar strength.

This presentation will discuss the generation of representative modeled microstructures, modeling frameworks, effects of key constituent properties and microstruc-tural.

2 Progress and Achievements in Materials Research over the Past Decade. This chapter highlights select examples of the advances that have been made since in the broad field of materials science and materials engineering. The tensile strengths of these fibers vary from to MPa (50– kpsi) and the tensile moduli range from 20 to 55 GPa (3–8 Mpsi).

Because of their relatively low tensile strength and high cost, the rayon-based carbon fibers have been largely supplanted by PAN-based carbon fibers. Reprinted with permission from High-Performance Cited by: 5. Organizers: Co-sponsored by: Technical Meeting and Exhibition M AT S CI TE CH.O RG SALT LAKE CITY FINAL PROGRAM EXHIBIT DIRECTORY C A LV I N L.

R A M P T O N S A LT PA L A C E CONVENTION CENTER OCTOBER 23 - 27,   After HF treatments, the average strengths of the uncoated and BN/SiC coated Hi-Nicalon fibers were +/- GPa and +/- GPa and the Weibull moduli were andrespectively.

The BN/SiC coated fibers extracted from the celsian matrix composite exhibited a strength of +/- GPa and a Weibull modulus of Woodhead Publishing ISBN (book) Woodhead Publishing ISBN (e-book) CRC Press ISBN CRC Press order number N The publishers’ policy is to use permanent paper from mills that operate a sustainable forestry policy, and which has been manufactured from pulp which is processed using acid.

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