Accession Number:
ADA393848
Title:
Experimental Investigation of Insulating Refractory-Metal Heat-Shield Panels
Descriptive Note:
Technical Note.
Corporate Author:
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
Personal Author(s):
Report Date:
1964-12-01
Pagination or Media Count:
59.0
Abstract:
The results of an experimental study to determine the capabilities and limitations of a thermal protection system utilizing thin-gage, refractory-metal shields are presented. Cyclic radiant-heating tests to 2,4OO F l,589 K were performed on a heat-shield panel with molybdenum-alloy shields coated with a silicide-base coating, and a radiographic technique was used to detect oxidation damage and brittle cracking of the coated shields. A heat-shield panel with columbium-alloy shields was subjected to supersonic flow conditions at a Mach number of 3 and dynamic pressure of l,5OO lbft2 71.8 kNm2. The results of preliminary tests on a prototype panel with nickel-alloy shields subjected to radiant-heating and wind-tunnel conditions are also reported. Evaluation tests on the molybdenum-alloy shield material were made at temperatures ranging from room temperature to 2,9000 F 1,8660 K. Oxidation results and metallurgical studies covering diffusion phenomena for coated molybdenum-alloy coupons and small riveted configurations under continuous and cyclic conditions at temperatures to 2,9000 F are also given.
Descriptors:
- *HEAT SHIELDS
- *HEAT RESISTANT MATERIALS
- *METALLURGY
- *REFRACTORY METAL ALLOYS
- TEMPERATURE
- DAMAGE
- PANELS
- CRACKS
- PROTOTYPES
- CYCLES
- ROOM TEMPERATURE
- COATINGS
- BRITTLENESS
- OXIDATION
- CONFIGURATIONS
- RIVETS
- PROTECTION
- SHIELDING
- NICKEL ALLOYS
- DIFFUSION
- RANGE(EXTREMES)
- SUPERSONIC FLOW
- RADIOGRAPHY
- DYNAMIC PRESSURE
- WIND TUNNELS
Subject Categories:
- Metallurgy and Metallography
- Protective Equipment