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Sliding wear of self-mated Al2O3-SiC whisker reinforced composites at 23-1200 C.

Author
Farmer, Serene C.
Published
Jul 1, 1991.
Physical Description
1 electronic document
Additional Creators
Book, Patricia O. and Dellacorte, Christopher
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Microstructural changes occurring during sliding wear of self-mated Al2O3-SiC whisker reinforced composites were studied using optical, scanning electron microscopy, and transmission electron microscopy. Pin-on-disk specimens were slid in air at 2.7 m/sec sliding velocity under a 26.5 N load for 1 hr. Wear tests were conducted at 23, 600, 800, and 1200 C. Mild wear with a wear factor of 2.4 times 10(exp -7) to 1.5 times 10(exp -6) cu mm/Nm was experienced at all test temperatures. The composite shows evidence of wear by fatigue mechanisms at 800 C and below. Tribochemical reaction (SiC oxidation and reaction of SiO2 and Al2O3) leads to intergranular failure at 1200 C. Distinct microstructural differences existing at each test temperature are reported.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19910017907.
Accession ID: 91N27221.
NAS 1.15:104490.
E-6344.
NASA-TM-104490.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15680159