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Thermal diffusivity of diamond filmsA laser pulse technique to measure the thermal diffusivity of diamond films deposited on a silicon substrate is developed. The effective thermal diffusivity of diamond film on silicon was measured by observing the phase and amplitude of the cyclic thermal waves generated by the laser pulses. An analytical model is developed to calculate the effective in-plane (face-parallel) diffusivity of a two layer system. The model is used to reduce the effective thermal diffusivity of the diamond/silicon sample to a value for the thermal diffusivity and conductivity of the diamond film. Phase and amplitude measurements give similar results. The thermal conductivity of the films is found to be better than that of type 1a natural diamond.
Document ID
19900043781
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Albin, Sacharia
(Old Dominion University Norfolk, VA, United States)
Winfree, William P.
(Old Dominion Univ. Norfolk, VA, United States)
Crews, B. Scott
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: Diamond Optics II
Location: San Diego, CA
Country: United States
Start Date: August 7, 1989
End Date: August 8, 1989
Accession Number
90A30836
Distribution Limits
Public
Copyright
Other

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