【摘要】 用四端引线法测量了U-10Zr(即U_O.77Zr_0.23)合金在300-1030 K温度范围的电阻,计算出了此温度范围的电阻率。由电阻率-温度曲线得到4个相变温度,分别为881、937、971和990 K。根据Wiedemann-Franz定律计算了各温度的热导率值,它在880 K以下和激光脉冲法得到的热导率值符合得很好。在880 K以上的值和Leibowitz等得到的U_0.75Zr_0.25的热导率值相一致。更多还原

【Abstract】 Electrical resistance of U-10Zr(U_0.77Zr_0.23) is measured by four-probe method at the tempera-ture range from 300 to 1030K, and electrical resistivity is calculated. Four transition temperaturesare obtained from the electrical resistivity curve, which are 881, 937, 971, and 990K,respectively. Thermal conductivity of U-10Zr alloys is also derived from the electrical resistivitydata according to Wiedemann-Franz’s law. Below 880 K, they are in good agreement with thethermal conductivity data derived from the thermal diffusion coefficient which is measured withlaser pulse method, and above 880 K they are in consistent with the experimental data of U_0.75Zr_0.25 alloys measured by Leibowitz et al.更多还原