Performance of Y-TZP Materials Between 800 C and 1200 C

Abstract

The performance of seven yttria-tetragonal zirconia polycrystal materials in the 800 C to 1200 C temperature range was examined using stepped- temperature stress-rupture tests. The strength in this temperature range was significantly lower than the room temperature strength. This is due to a decrease in the chemical driving force for the tetragonal-to-monoclinic transformation. As a result, these materials are not suitable for high temperature structural applications. At these temperatures the strength is controlled by microstructural parameters such as grain size, grain size distribution, and porosity. Keywords: Ceramic materials.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA217723

Entities

People

  • Jeffrey J. Swab

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Advanced Materials
  • Agreements
  • Air Force
  • Creep
  • Engineering
  • Engines
  • Grain Size
  • Heat Engines
  • High Temperature
  • Information Processing
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Microstructure
  • Military Research
  • Polycrystals

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.