Specific heat and electric conductivity of zirconium alloy with 2,5 mass% niobium in the range of phase transitions

Experimental investigation of specific heat and electric resistance of zirconium alloy with 2.5 mass% niobium in the range of phase transitions was conducted, using adiabatic calorimeter of original design, characterized by high sensitivity, efficiency and high accuracy. It was revealed that temperature dependence of specific heat was characterized by anomalous growth at 590 deg C, related with (α+βNb)→(α+βZr)-transition, and at 810 deg -related with (α+βZr)→βZr - transition. Temperature dependence of electric resistance was specific in the region of α+βZr→βZr phase transition. It was established that revealed anomalies were connected with high oxygen absorption at high temperatures. 11 refs., 1 fig., 1 tab