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.

在本文中，当接触界面充满空气时，对复合材料的三个不同接触点的热接触电阻（TCR）进行了实验研究。三个触点的表面粗糙度分别为0.95 / 16.91μm（触点A，钛合金/复合材料），9.54 / 9.73μm（触点B，复合材料/复合材料）和11.53 / 6.85μm（触点C，复合材料/钛合金）。随着负载压力和界面温度的升高，三个触点的实测TCR减小。对于触点B，温度对热接触电阻的影响随着负载压力的增加而逐渐减小。对于触点C，当加载压力增加到3.6 MPa时，随着加载压力的增加，热接触电阻的减小趋势变得平缓。另外，分析和计算实验不确定性。