Advanced ceramics have reached a level of material development to warrant serious consideration for use in advanced heat engine designs. Typically, design requirements based on service conditions may include 25,000 h lifetimes under stresses and temperatures of up to 250 MPa and 1370°C, respectively, with probabilities of failure of <0.1 percent. To assure that materials meet these stringent requirements requires long-term testing under the service conditions. Tensile tests at 1370°C in ambient air have been conducted on silicon nitride alloys to 5000 h with reports of 10,000 h tests for silicon carbide. To provide useful data, such long-term tests must incorporate such meticulous attention to detail as: strict temperature control (±5°C); accurate temperature measurement (1 percent of the nominal temperature); close control of grip cooling (±0.1°C) and ambient environment (±0.25°C); stable, high-resolution extensometry (±0.5 μm); reliable heating (MTBF > 10,000 h) and load control (gravity-controlled, dead load), and responsive data acquisition systems (12-bit, digital collection). Data thus obtained can be used as input into design codes such as NASA CARES/LIFE to predict and confirm reliability/durability.
Skip Nav Destination
Article navigation
October 1996
Research Papers
Long-Term Testing of Advanced Ceramics: Concerns, Insights, and Recommendations
M. G. Jenkins
M. G. Jenkins
Department of Mechanical Engineering, University of Washington, Seattle, WA 98195
Search for other works by this author on:
M. G. Jenkins
Department of Mechanical Engineering, University of Washington, Seattle, WA 98195
J. Eng. Gas Turbines Power. Oct 1996, 118(4): 704-710 (7 pages)
Published Online: October 1, 1996
Article history
Received:
February 27, 1995
Online:
November 19, 2007
Citation
Jenkins, M. G. (October 1, 1996). "Long-Term Testing of Advanced Ceramics: Concerns, Insights, and Recommendations." ASME. J. Eng. Gas Turbines Power. October 1996; 118(4): 704–710. https://doi.org/10.1115/1.2816983
Download citation file:
Get Email Alerts
Cited By
Blade Excitation Alleviation of a Nozzleless Radial Turbine by Casing Treatment Based on Reduced Order Mode
J. Eng. Gas Turbines Power
Design And Testing of a Compact, Reverse Brayton Cycle, Air (R729) Cooling Machine
J. Eng. Gas Turbines Power
Experimental Study on Liquid Jet Trajectory in Cross Flow of Swirling Air at Elevated Pressure Condition
J. Eng. Gas Turbines Power
Related Articles
Reliability of a Conceptual Ceramic Gas Turbine Component Subjected to Static and Transient Thermomechanical Loading
J. Eng. Gas Turbines Power (April,1998)
Development and Turbine Engine Performance of Three Advanced Rhenium Containing Superalloys for Single Crystal and Directionally Solidified Blades and Vanes
J. Eng. Gas Turbines Power (July,1998)
Improved Performance Rhenium Containing Single Crystal Alloy Turbine Blades Utilizing PPM Levels of the Highly Reactive Elements Lanthanum and Yttrium
J. Eng. Gas Turbines Power (January,1999)
The Development of Life Prediction Techniques for Structural Ceramics
J. Eng. Gas Turbines Power (October,1996)
Related Proceedings Papers
Related Chapters
Surface Analysis and Tools
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Section III: Subsections NC and ND — Class 2 and 3 Components
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Fourth Edition
A PSA Update to Reflect Procedural Changes (PSAM-0217)
Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)