Composite materials were studied by ScanningThermal Conductivity Microscope (STCM) and high speedthermography. The STCM is a qualitative technique which isused to study thermal conductivity variations on a sub-micrometer scale. High speed thermography is a quantitativetechnique for measuring thermal diffusivity with a variablespatial resolution from centimeters down to less than 25 #mu#m.A relative thermal conductivity contrast map was obtained froma SiC/Si_3N_4 continuous fiber ceramic composite using theSTCM. Temperature changes of a carbon/carbon composite aftera heat pulse were captured by an IR camera to generate athermal diffusivity map of the specimen. Line profiles of thetemperature distribution showed significant variations as a resultof fiber orientation.
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