Improved Ceramic Heat Exchanger Materials.

Abstract

Numerous compositions were developed and evaluated for potential application as heat exchanger structures in automative gas turbine engines. Test specimens in the form of small monolithic bars were evaluated for thermal expansion and dimensional stability before and after exposure to sea salt and sufuric acid, followed by short and long term cycling at temperatures up to 1200 C (2192 F). Materials which survived the screening tests were considered for fabrication into honeycomb form. The material finally selected, GE-7808, consists of the oxides, ZrO2-MgO-Al203-SiO2, and is described generically as ZrMAS. The original version on which the primary work was done was based on a commercially available cordierite (MAS) frit. Late in the program, however a clay/talc mixture was demonstrated to be a satisfactory very low cost source of the cordierite (MAS) phase.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1980
Accession Number
ADA094029

Entities

People

  • Harry W. Rauch Sr.
  • Louis R. Mccreight

Organizations

  • General Electric

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Cellular Structures
  • Ceramic Materials
  • Corrosion Resistance
  • Fabrication
  • Gas Turbines
  • Geometry
  • Heat Exchangers
  • Heat Transfer
  • Honeycomb Structures
  • Ions
  • Materials
  • Measurement
  • Mechanical Properties
  • Modulus Of Elasticity
  • Silicates
  • Turbines
  • United States

Readers

  • Combustion and Flow Dynamics.
  • Software Engineering
  • Surface Coatings Technology.