Materials support for HITAF. Final report for Phase 1 Metadata

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Title

  • Main Title Materials support for HITAF. Final report for Phase 1

Creator

  • Author: Breder, K.
    Creator Type: Personal
  • Author: Tennery, V. J.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)

Publisher

  • Name: Oak Ridge National Laboratory
    Place of Publication: Tennessee
    Additional Info: Oak Ridge National Lab., TN (United States)

Date

  • Creation: 1995-03-01

Language

  • English

Description

  • Content Description: Improvements in coal-fired systems will require a change from steam turbines to gas turbines using air as working fluid; pressurized ceramic heat exchangers operating up to 1600 C will be needed. Leading candidate materials are SiC-based ceramics. Mechanical properties of 3 materials are compared in this work: NT230 Si/SiC from Saint Gobain Norton, {beta}-SiC from Coors Ceramics Co., and Lanxide DIMOX SiCp/Al{sub 2}O{sub 3} from Du Pont Lanxide Composites Inc. The first material is siliconized Si carbide, the second is sintered. They all were tested in 4-point flexure at RT and 1100 and 1400 C. Fast-fracture tests were carried out. Slow crack growth was investigated. Failure modes were studied using optical microscopy and SEM. Four materials were exposed to two coal ashes at two different temperatures. In the comparison, Coors {beta}-SiC stands out from a strength and reliability standpoint when exposed to air at high temperatures. Lanxide DIMOX withstood coal ash exposure well.
  • Physical Description: 61 p.

Subject

  • Keyword: Gas Turbine Power Plants
  • Keyword: Silicon Carbides
  • STI Subject Categories: 36 Materials Science
  • Keyword: Progress Report
  • Keyword: Materials Testing
  • Keyword: Composite Materials
  • STI Subject Categories: 20 Fossil-Fueled Power Plants
  • Keyword: Aluminium Oxides
  • Keyword: Heat Exchangers
  • Keyword: Fracture Properties
  • Keyword: Coal-Fired Gas Turbines

Source

  • Other Information: PBD: Mar 1995

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE95015799
  • Report No.: ORNL/TM--12815
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/93420
  • Office of Scientific & Technical Information Report Number: 93420
  • Archival Resource Key: ark:/67531/metadc792288

Note

  • Display Note: OSTI as DE95015799
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