Behavior of Stabilized Zirconia in Molten Sodium Sulfate.

Abstract

Samples of zirconia (ZrO2) stabilized with various oxides including calcia (CaO), magnesia (MgO), and yttria (Y2O3) were exposed to molten sodium sulfate (Na2SO4) at 1650F for periods up to 1000 hours to obtain an indication of the materials' resistance to sulfidation. Analysis by light and scanning electron microscopy, together with elemental X-ray fluorescence spectroscopy, indicated only slight attack of the zirconia manifested by surface roughening and the formation of crystalline 'growths' thought to have a composition similar to that of zircon (ZrSiO4). Thin, glass-like layers were formed on the surfaces of the MgO- and Y2O3-stabilized specimens tested for 1000 hours. Both the glassy layers and the crystalline 'growths' contained trace amounts of sodium (Na), indicating that some reaction with the Na2SO4 had occurred.

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1974
Accession Number
ADA001695

Entities

People

  • R. L. Clarke
  • S. J. Dapkunas

Tags

DTIC Thesaurus Topics

  • Electron Microscopy
  • Electrons
  • Fluorescence
  • Microscopy
  • Optical Analysis
  • Resistance
  • Scanning
  • Scanning Electron Microscopy
  • Spectroscopy
  • X Rays

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene