High Temp Toughening and Creep Studies.

Abstract

Early in 1985, the lanthanide sesquioxides (Ln2O3) were identified as potential high temperature transformation tougheners alternative to zirconia (ZrO2). their 8-10% volume increase accompanying the monoclinic (B) to cubic (C) transformation suggested that they should be more powerful than ZrO2. In addition, the Ms temperature was raised up to 2200 C indicating that, based on thermodynamics alone, transformation toughening up to this temperature should be possible. Hence a proposal was written with the aim of transformation toughening silicon carbide (SiC) with dispersions of monoclinic dysprosia particles giving a microstructure analogous to Zirconia-toughened-alumina (ZTA). Keywords: Composite materials; Cracking; Graphite; Sintering; Silica; Annealing; Silicon carbides. (kt)

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Document Details

Document Type
Technical Report
Publication Date
May 11, 1989
Accession Number
ADA208714

Entities

People

  • Waltraud M. Kriven

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aluminum Oxides
  • Calcium Compounds
  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Electron Microscopy
  • Material Degradation Processes
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Phase Transformations

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.