论文标题
$α$ - $ω$ zr混合物，转换动力学和钻石砧式摩擦的$α$ - $ω$ zr混合物中的紧张应力 - 塑料应变场
Tensorial stress-plastic strain fields in $α$-$ω$ Zr mixture, transformation kinetics, and friction in diamond anvil cell
论文作者
论文摘要
在钻石砧细胞中高压下的各种现象（相变，化学反应和摩擦）受应力和塑性应变张量的所有组成部分的强烈影响。但是，无法测量它们。即使测得的压力分布也包含明显的误差。在这里，我们建议利用同步加速器X射线衍射的实验 - 分析 - 分析 - 计算方法耦合，以解决反向问题，并在$α$ - $ω$ - $ω$相位转换之前，在强大的预性ZR中找到所有这些字段和摩擦规则。由于先进的表征，应变诱导的$α$ - $ω$相变的最小压力从1.36更改为2.7 GPA。它独立于压缩剪切路径。理论上预测的塑性应变控制动力学方程得到了验证和量化。获得的结果开放了开发定量高压/压力科学的机会，包括机械化学，材料合成和摩擦学。
Various phenomena (phase transformations, chemical reactions, and friction) under high pressures in diamond anvil cell are strongly affected by fields of all components of stress and plastic strain tensors. However, they could not be measured. Even measured pressure distribution contains significant error. Here, we suggest coupled experimental-analytical-computational approaches utilizing synchrotron X-ray diffraction, to solve an inverse problem and find all these fields and friction rules before, during, and after $α$-$ω$ phase transformation in strongly plastically predeformed Zr. Due to advanced characterization, the minimum pressure for the strain-induced $α$-$ω$ phase transformation is changed from 1.36 to 2.7 GPa. It is independent of the compression-shear path. The theoretically predicted plastic strain-controlled kinetic equation is verified and quantified. Obtained results open opportunities for developing quantitative high-pressure/stress science, including mechanochemistry, material synthesis, and tribology.
