In the present work, the wettability and interface thermal resistance (ITR) of copper/graphite (Cu/Gr) system with an addition of chromium (Cr) was studied. First, alloy element of Cr (1.0 wt.%) was introduced in copper to improve the wettability of Cu/Gr system. The wetting procedure of liquid Cu-Cr alloy on graphite substrate was studied by sessile drop method. It was found that the contact angle decreased to 43 degrees with addition of Cr. Then, an experimental method was employed to determine the FUR of Cu/Gr system. Results reveal that the ITR decreased significantly with the introducing of Cr. It suggested that the reduction of FUR related to the formation of a continuous carbide layer at the interface zone which consisted of Cr7C3 and Cr3C2. (C) 2011 Elsevier B.V. All rights reserved.