Measurement of thermal properties of a ceramic/metal joint by laser flash method

Abstract This work describes the measurement of thermal diffusivity and the subsequent calculation of thermal conductivity and thermal contact resistance (from room temperature to 800 °C in N 2 atmosphere) at the material interface for carbon/carbon composites (C/C) joined to copper by using the laser flash method. According to these measurements, the thermal resistance at the interface, that is related to the heat transfer through the solid, is −6  m 2  K W −1 up to 800 °C, indicating a high quality of the joint and no limitations for the thermal heat transfer during operation, e.g. in a nuclear fusion reactor. This measurement is proposed as an innovative non-contact and qualitative investigation technique to assess the ceramic/metal joint integrity.

[1]  T. Nguyen,et al.  Experimental investigation on the thermal contact resistance between gold coating and ceramic substrates , 2001 .

[2]  M. Ferraris,et al.  Direct joining of CFC to copper , 2004 .

[3]  R. Tivey,et al.  Status of CFC development in Europe for ITER , 2007 .

[4]  Hugh O. Pierson,et al.  Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing and Applications , 1996 .

[5]  Gerald Pintsuk,et al.  Mechanical and thermo-physical characterization of the carbon fibre composite NB31 , 2007 .

[6]  B. Hay,et al.  Uncertainty of Thermal Diffusivity Measurements by Laser Flash Method , 2005 .

[7]  Hung Joo Lee.  THERMAL DIFFUSIVITY IN LAYERED AND DISPERSED COMPOSITES. , 1975 .

[8]  K. Lafdi,et al.  The effect of a CNT interface on the thermal resistance of contacting surfaces , 2007 .

[10]  Hubert M. James,et al.  Some extensions of the flash method of measuring thermal diffusivity , 1980 .

[11]  A. Lindemann,et al.  A new laser flash system for measurement of the thermophysical properties , 2007 .

[12]  Robert D. Cowan,et al.  Pulse Method of Measuring Thermal Diffusivity at High Temperatures , 1961 .

[13]  Chia-Pin Chiu,et al.  Characterization of solder interfaces using laser flash metrology , 2002, Microelectron. Reliab..

[14]  M. Ferraris,et al.  Proposal for a new technique to join CFC composites to copper , 2006 .

[15]  V. Chuyanov,et al.  Overview of the engineering design of the ITER divertor improvements towards manufacture , 2005 .

[16]  Joseph Absi,et al.  Thermal response of two-layer systems: Numerical simulation and experimental validation , 2005 .