EVALUATION OF HYPERSONIC PROBE MATERIALS IN A WATER-STABILIZED ELECTRIC ARC AT TEMPERATURES TO 3200 C (5795 F) FOR 60 SECONDS
Abstract
Mach 8.5 pressure probes were tested to evaluate their behavior during re-entry trajectory heating conditions. A water-stabilized electric arc was used to simulate re-entry heat input of 450 BTU/sq ft-sec to be reached in 25 second . Duration of test was 60 seconds. O UT OF !< COATINGS TESTED ON Mo, a sprayed coating of 90W+10ZrO2 exhibited the least damage. Other coatings, AlCr-Si, MoSi2, gradated ZrO2 and ZrB2 protected the Mo against atastrophic oxidation. Out of 3 coatings tested on graphite, a vapor-deposited, SiC coating on graphite showed the least damage. American Lava Corp coating and a 90W+10ZrO2, sprayed coating eroded but still protected the graphite against oxidation. Among 8 uncoated materials tested, W and SiC exhibited the least damage. Graphite eroded moderately, however, Mo oxidized catastrophically. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1962
- Accession Number
- AD0286066
Entities
People
- D.j. Molella
Organizations
- Army Research Office