Accession Number:

AD0612657

Title:

BEHAVIOR OF NOZZLE MATERIALS UNDER EXTREME ROCKET MOTOR ENVIRONMENTS.

Descriptive Note:

Quarterly progress rept. no. 3, Nov 64-Jan 65,

Corporate Author:

ATLANTIC RESEARCH CORP ALEXANDRIA VA

Personal Author(s):

• Batchelor,J. D.

Report Date:

1965-03-01

Pagination or Media Count:

21.0

Abstract:

During the third quarterly period of the program, experimental reaction studies were continued using the two techniques with the plasma torch heat source. The test technique which exposes the bore of a tubular specimen to a high heat flux and a high velocity of selected gas mixtures was used with graphite, HfC and NbC specimens. This technique has become the preferred means of studying chemical reactions. A good number of specimens of each of the four refractory carbides under investigation has been received from Carborundum and work is continuing on these materials. The plasma torch impingement test method was used in an attempt to obtain data from pyrolytic graphite coated specimens comparable to data published previously for other graphites. Detailed microscopic examination of both types of specimens was started to improve the understanding of the attack mechanism. Author

Descriptors:

• *GRAPHITE
• *CARBIDES
• ROCKET NOZZLES
• ROCKET NOZZLES
• PLASMAS(PHYSICS)
• LABORATORY FURNACES
• ENVIRONMENTAL TESTS
• PIPES
• REFRACTORY MATERIALS
• REFRACTORY COATINGS
• HAFNIUM COMPOUNDS
• NIOBIUM COMPOUNDS
• EROSION
• TEST METHODS
• CHEMICAL REACTIONS
• HIGH TEMPERATURE
• SCIENTIFIC RESEARCH
• NITROGEN
• CARBON DIOXIDE
• HYDROGEN
• WATER

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE