...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Thermophysical properties of zirconium at high temperature
【24h】

Thermophysical properties of zirconium at high temperature

机译：高温下锆的热物理性质

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Six thermophysical properties of both solid and liquid zirconium measured using the high-temperature electrostatic levitator at the Jet Propulsion Laboratory are presented. These properties are density, thermal expansion coefficient, constant pressure heat capacity, hendspherical total emissivity, surface tension, and viscosity. For the first time, we report the densities and the thermal expansion coefficients of both the solid as well as liquid Zr over wide ranges of temperatures. Over the 1700--2300 K temperature span, the liquid density can be expressed as p,(T) = 6.24 x 10~3 - 0.29(T - T_m) kg/m~3 with T_m = 2l28 K, and the corresponding volume expansion coefficient as α_l = 4.6 x 10~-5 /K. Similarly, over the l250-2100 K range, the measured density of the solid can be expressed as p_s(T) = 6.34 x l0~3 - 0.15(T - T_m), giving a volume expansion coefficient α_s = 2.35 x 10~-5 /K. The constant pressure heat capacity of the liquid phase could be estimated as C_p1(T) = 39.72 - 7.42 x l0~-3(T - T_m) J/(mol/K) if the hendspherical total emissivity of the liquid phase ∈_Tl remains constant at 0.3 over the 1825--2200 K range. Over the l400-2100 K temperature span, the hemispherical total emissivity of the solid phase could be rendered as ∈_ts(T) = 0.29 - 9.91 x l0~3 (T - T_m). The measured surface tension and the viscosity of the molten zirconium over the l850--2200 K range can be expressed as σ(T) = l.459 x l0~3 - 0.244 (T - T_m) mN/m and as n(T) = 4.83 - 5.3l x l0~-3(T - T_m) mPa s, respectively.
机译：介绍了在喷气推进实验室使用高温静电悬浮仪测量的六种固态和液态锆的热物理性质。这些特性是密度，热膨胀系数，恒压热容，半球总发射率，表面张力和粘度。首次，我们报告了固态Zr和液态Zr在较大温度范围内的密度和热膨胀系数。在1700--2300 K的温度范围内，液体密度可以表示为p，（T）= 6.24 x 10〜3-0.29（T-T_m）kg / m〜3，T_m = 2l28 K，以及相应的体积膨胀系数为α_1= 4.6 x 10〜-5 / K。同样，在1250-1200 K范围内，固体的实测密度可以表示为p_s（T）= 6.34 x l0〜3-0.15（T-T_m），从而得到体积膨胀系数α_s= 2.35 x 10〜- 5 / K。如果液相的半球形总发射率ε_Tl保持不变，则液相的恒压热容可以估算为C_p1（T）= 39.72-7.42 x l0〜-3（T-T_m）J /（mol / K）在1825--2200 K范围内恒定为0.3。在1400-2100 K的温度范围内，固相的半球形总发射率可以表示为∈_ts（T）= 0.29-9.91 x l0〜3（T-T_m）。在l850--2200 K范围内测得的熔融锆的表面张力和粘度可以表示为σ（T）= l.459 x l0〜3-0.244（T-T_m）mN / m和n（T ）分别为4.83-5.3lx l0〜-3（T-T_m）mPa s。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号