NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Role of the interfacial thermal barrier in the effective thermal diffusivity/conductivity of SiC-fiber-reinforced reaction-bonded silicon nitrideExperimental thermal diffusivity data transverse to the fiber direction for composites composed of a reaction bonded silicon nitride matrix reinforced with uniaxially aligned carbon-coated silicon carbide fibers indicate the existence of a significant thermal barrier at the matrix-fiber interface. Calculations of the interfacial thermal conductances indicate that at 300 C and 1-atm N2, more than 90 percent of the heat conduction across the interface occurs by gaseous conduction. Good agreement is obtained between thermal conductance values for the oxidized composite at 1 atm calculated from the thermal conductivity of the N2 gas and those inferred from the data for the effective composite thermal conductivity.
Document ID
19900038213
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bhatt, Hemanshu
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Donaldson, Kimberly Y.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Hasselman, D. P. H.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Bhatt, R. T.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: American Ceramic Society, Journal
Volume: 73
ISSN: 0002-7820
Subject Category
Composite Materials
Accession Number
90A25268
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available