0
RESEARCH PAPERS: Gas Turbines: Ceramics

A Technique to Achieve Uniform Stress Distribution in Compressive Creep Testing of Advanced Ceramics at High Temperatures

[+] Author and Article Information
K. C. Liu, C. O. Stevens, C. R. Brinkman

Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, TN 37831-6155

N. E. Holshauser

North Carolina A & T State University, Department of Mechanical Engineering, Greensboro, NC 27411

J. Eng. Gas Turbines Power 119(3), 500-505 (Jul 01, 1997) (6 pages) doi:10.1115/1.2817012 History: Received February 01, 1996; Online November 19, 2007

Abstract

A technique to achieve stable and uniform uniaxial compression is offered for creep testing of advanced ceramic materials at elevated temperatures, using an innovative self-aligning load-train assembly. Excellent load-train alignment is attributed to the inherent ability of a unique hydraulic universal coupler to maintain self-aligning. Details of key elements, design concept, and principles of operation of the self-aligning coupler are described. A method of alignment verification using a strain-gaged specimen is then discussed. Results of verification tests indicate that bending below 1.5 percent is routinely achievable with the use of the load-train system. A successful compression creep test is demonstrated using a dumb-bell-shaped silicon nitride specimen tested at 1300°C for a period in excess of 4000 h.

Copyright © 1997 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In