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Accession Number:
AD0258762
Title:
INVESTIGATIONS OF THE DETERIORATION OF 22 REFRACTORY MATERIALS IN A MACH NUMBER 2 JET AT A STAGNATION TEMPERATURE OF 3,800 F
Descriptive Note:
Corporate Author:
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C
Report Date:
1961-06-01
Pagination or Media Count:
1.0
Abstract:
A limited investigation of the deterioration characteristics of 22 refractory materials was conducted by exposing them to a stagnation temperature of 3,800 F in a Mach number 2 ceramicheated jet. The materials tested were 6 materials whose major constituent was SiC, 5 cermets whose major constituent was TiC, 6 materials whose major constituents were metal borides, 4 cermets containing alumina, and 1 silicon nitride model. Tests consisted of obtaining weight change and appearance changes for 12-inch-diameter hemispherical-nose cylindrical models exposed to the air jet for 30 sec at a time for a total of 4 runs or 2 min. exposure. It was concluded that only those materials which changed in weight the least cound be recommended for further extensive application-oriented evaluations. The following materials fell in this category SiC - Si, Cr - 28 alumina cermet, titanium boride - 5 B4C. The remainder of the materials tested had oxidation characteristics which appeared to be too severely limiting of their general applications to flight vehicles. Author
Distribution Statement:
APPROVED FOR PUBLIC RELEASE