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Structure and thermal cycling stability of a hafnium monocarbide reinforced directionally solidified cobalt-base eutectic alloy

Author
Kim, Y. G.
Published
JAN 1, 1975.
Physical Description
1 electronic document
Online Version

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Summary
A nominal composition of Co-15Cr-2ONi-10.5 Hf-0.7 C (NASA-HAFCO-11) was directionally solidified at 0.8 cm/hr growth rate to produce aligned HfC in a cobalt matrix alloy. The aligned HfC fibers were present as rod and plate types. The diameter of the aligned fibers was about 1 micron, with volume fraction in the range of 11 to 15 percent. The growth direction of the fibers was parallel to the 100. The NASA-HAFCO-11 alloy was subjected to thermal cycling between 425 deg and 1100 C, using a 2.5 minute cycle. No microstructural degradation of the HfC fibers in the alloy was observed after 2500 cycles.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19750021169.
Accession ID: 75N29242.
E-8391.
NASA-TM-X-71751.
Conf. on In-Situ Composites; 2-5 Sep. 1975; Lake George, N. Y.; United States.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15739139