Sodium Sulfate Hot Corrosion of Silicon Carbide Fiber-Reinforced Calcium Aluminosilicate.

Abstract

The effects of sodium sulfate hot corrosion on the microstructure of silicon carbide fiber-reinforced calcium aluminosilicate glass-ceramic matrix composite were investigated using optical microscopy, scanning electron microscopy (SEM) and x-ray diffraction (XRD). Hot corrosion of samples at 900 deg C for 50 hours in both air and argon was investigated. SEM and XRD investigations of the sample exposed in air revealed a complex mixture of wollastonite, nepheline and albite whereas exposure in argon showed pseudowollastonite, nepheline and calcium sulfide. It was observed that the presence of Na2SO4 enhanced the oxidation of the silicon carbide fiber to silica which further reacted to form the products of corrosion. jg p.2

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1995
Accession Number
ADA297663

Entities

People

  • Maria A. Oppici

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Ceramic Matrix Composites
  • Chemical Synthesis
  • Chemistry
  • Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Material Degradation Processes
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Engineering
  • Microscopy
  • Scanning Electron Microscopy
  • Silicates
  • Silicon Carbide
  • Tectosilicates
  • Turbines

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials
  • Surface Coatings Technology.

Technology Areas

  • Microelectronics