Non-contact Measurement of Creep in Ultra-High-Temperature Materials

Abstract

Report developed under STTR contract for topic AF08-T004. This report describes a Phase I feasibility study of applying a non-contact method for measuring creep in ultra high temperature ceramics. Low-precision samples were successfully processed at relevant temperatures, and coupled well to the new magnetic device used to induce the rotation that applies the load to the samples. Simulations based on published conventional measurements at lower temperatures indicate that the measurements are feasible for temperatures exceeding 1800 C for zirconium diboride and 1500 C for a composite of zirconium diboride with 25 volume percent silicon carbide at rotation rates that are within the design envelope for the apparatus. High-precision spheres were successfully manufactured from both materials. Delays in manufacturing prevented integrated trials with the high-precision spheres, however. Nevertheless, the combination of successful processing of low-precision spheres and promising results from the finite element simulations indicate that the method is feasible for measuring the creep of these ultra high temperature materials.

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Document Details

Document Type
Technical Report
Publication Date
Nov 04, 2009
Accession Number
ADA524249

Entities

People

  • Robert W. Hyers

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Computational Science
  • Creep
  • Elements
  • High Temperature
  • Magnetic Devices
  • Materials
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Silicon Carbide
  • Simulations
  • Stresses
  • Transition Metals

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Thermal Physics or Thermal Science.