Compressibility and thermal expansion study of δ-UZr2 at high pressure and high temperature
作者:Balmukund Shukla、N.R. Sanjay Kumar、Gurpreet Kaur、N.V. Chandra Shekar、A.K. Sinha
DOI:10.1016/j.jallcom.2019.152214
日期:2020.1
different pressure intervals at ambient temperature. At elevated temperature c/a ratio, shows a marginal increase with pressure. The bulk modulus and its pressure derivative at ambient temperature are found to be 108.3 GPa and 5.0, respectively. High-pressure and high-temperature studies reveal a softening in the material at higher temperatures. The thermal expansion coefficients are found to decrease from
摘要 UZr2 已使用电弧熔化技术合成。在室温下,发现该化合物以改性的 C32、AlB2 型结构(称为 δ 结构)结晶,并且在高达 20 GPa 的压力下仍保持稳定。然而,在环境温度下的不同压力区间中观察到 c/a 比的异常下降。在升高的温度下,c/a 比值随压力略有增加。发现体积模量及其在环境温度下的压力导数分别为 108.3 GPa 和 5.0。高压和高温研究表明材料在较高温度下会软化。发现热膨胀系数在 300 K–473 K 的温度范围内从 1.2 GPa 时的 4.6 × 10-5 K-1 降低到 6.6 GPa 时的 2.7 × 10-5 K-1。