X-Ray Radiography of Gas Turbine Ceramics.
Abstract
This program was conceived for the purpose of investigating X-ray radiography and X-ray tomography in the detection of gross fabrication flaws in complex-shaped ceramic components such as those currently under development for advanced high temperature turbine engines. The first year effort of the program was directed towards the fabrication of ceramic test coupons with defects of known size and shape; the establishment of baseline data for the resolution of these defects using Microfocus X-ray equipment; the definition of equipment concepts for a computer assisted tomography (CAT) system; and the development of a CAT algorithm. Silicon nitride coupons with slot type defects (25-175 microns) and circular shaped defects (25-1000 microns) were fabricated. Baseline data were obtained from these test coupons using Microfocus X-ray and image enhancement techniques. A Computer Assisted Tomography (CAT) design concept was defined, which employs a computer-operated rotary stage, intensifying screen or X-ray film, TV camera, computer, digital image analyzer, and TV monitor. Computer reconstruction algorithms were investigated with respect to CAT and a preferred approach was determined. An appropriate CAT algorithm was written and tested. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 20, 1979
- Accession Number
- ADA080440
Entities
People
- D. J. Cassidy
- M. F. Elgart
Organizations
- Ford Motor Company