A Laboratory Method for Thermal Fracture of Graphite
Abstract
A method was developed for producing thermal stress failure in ATJ-S graphite and the initial results are described. Test specimens are 10-cm-long hollow cylinders with outer and inner radii of 1.9 and 0.4 cm, respectively. The outside is heated by induction at a frequency of 1.4 MHz by a 100-kW power oscillator; the inside is kept below 100C by forcing water at a rate of 5 gpm through the copper-coated bore. A special lead soldering technique has been developed to fasten the coolant ducts to the specimen. The inductor coil is protected by an oil bath against heat and electric breakdown.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 1972
- Accession Number
- AD0753392
Entities
People
- Hans U. Eckert
Organizations
- The Aerospace Corporation