Experimental study on thermal contact resistance of carbon fiber reinforced silicon carbide composite with 3D needled preform (3DN C/SiC)

摘要

In this paper, thermal contact resistance (TCR) of three different contacts of a composite are experimentally investigated when the contact interfaces are filled with air. The surface roughnesses of the three contacts are 0.95/16.91 μm (Contact A, titanium alloy/composite), 9.54/9.73 μm (Contact B, composite/composite), and 11.53/6.85 μm (Contact C, composite/titanium alloy). The measured TCRs of the three contacts decrease with an increase in loading pressure and interface temperature. For Contact B, the effect of temperature on thermal contact resistance gradually decreases with an increasing loading pressure. For Contact C when loading pressure increases to 3.6 MPa, the decreasing trend of the thermal contact resistance with increasing loading pressure becomes mild. Additionally, experimental uncertainties are analyzed and calculated.