In Search of Early Time: An Original Approach in the Thermographic Identification of Thermophysical Properties and Defects

Table 2

In situ identified thermal properties of two 3D C/C composites, taken from [10].

Identified thermal parameters	Materials
	3-D C/C no. 1	3-D C/C no. 3 //	3-D C/C no. 3 ⟂
Mean volume heat capacity^a
𝑐 (MJ m^−3 K^−1)	1.4	1.4	1.4
Homogenized properties
𝜅 (cm^2 s^−1)	1.09	0.90	1.06
𝑘 (W m^−1 K^−1)	154	127	149
Reinforcement//heat flux
𝜅𝑅 (cm^2 s^−1)	3.0	2.6	3.1
𝑘𝑅 (W m^−1 K^−1)	423	366	437
Equivalent matrix
𝜅𝑀 (cm^2 s^−1)	0.27	0.33	0.48
𝑘𝑀 (W m^−1 K^−1)	38	46	68
Reinforcement/matrix interface
𝜌	0.01	1.6	6.6
𝑅 (m^2 K W^−1)	2.0·10^−7	2.8·10^−5	5.7·10^−5

^aEstimated value.