On-Line Quantitative Nondestructive Evaluation and Characterization of Tough Ceramics at Operating Temperatures (DURIP)
Abstract
A grant of $70,000 from AFOSR was used to buy a 600W CO2 laser. This was combined with items bought with supplemental funds from other sources to assemble a facility for characterization of ceramic materials at extremely high temperatures (up to 2000C is anticipated) in air. The system splits the laser beam into two equal components each of which is coupled into its own computer controlled galvanometric scanner that scans the beam rapidly over a central portion of the front or back surface of a flat specimen. The scan rate and scan density is controlled to yield a test volume, in the mid-section of the specimen, that is at uniform temperature and free of thermal stresses. Related research is developing non-contact methods for stain measurements and damage detection within the central volume of material that is at the test temperature. Characterization of material properties and behavior in a wide range of severe environments will be possible with this system. Keywords: Tough ceramics, Non-destructive evaluation, High temperature.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 25, 1990
- Accession Number
- ADA224730
Entities
People
- Christian P. Burger
Organizations
- Texas A&M University