DEPTH PROFILE OF COPPER, ZIRCONIUM, AND CARBON IN CU-ZR-C SYSTEM AFTER HEAT-TREATMENT

The diffusion of zirconium and copper deposited on a flat graphite sur face after annealing at 898 K for 1800 s and 1233 K for 300 s was stud ied by glow discharge optical emission spectrometry. At the temperatur e of 898 K no mutual diffusion of Zr and Cu appears. At the temperatur e of 1233 K Zr diffuses into Cu, and a zirconium containing phase at t he contact with carbon may occur. The obtained results have a qualitat ive character and are discussed in connection with the influence of zi rconium on the thermal conductivity of the Cu-Zr matrix.