Pressure-dependent topographic evolutions of cold-sintered zinc oxide surfaces
Pressure-dependent topographic evolutions of cold-sintered zinc oxide surfaces
复制标题
冷烧结氧化锌表面的压力相关形貌演化
DOI：
10.1039/d1tc04651a
复制
发表时间：
2021
影响因子：
6.4
通讯作者：
Randall, Clive A.
中科院分区：
文献类型：
--
作者：
Bang, Sun Hwi;Randall, Clive A.
通过将原子力显微镜应用于平面内多晶微结构，可以研究表面二面角和凹槽几何形状的压力依赖性形貌演化。本研究使用 200 °C 致密化的冷烧结氧化锌作为模型系统，展示了冷烧结材料系统中相对晶界能量定量的实验方法，以及用于连接 70 至 475 MPa 各种单轴压力下的形态变化和潜在机械化学现象的相关几何模型。根据施加的压力，根据凹槽几何形状的变化，可以明显观察到各向异性晶粒生长、正常晶粒生长和颗粒粗化，这表明生长动力学可以被视为压力的函数。
By applying atomic force microscope to the flat in-plane polycrystalline microstructure, pressure-dependent topographic evolutions can be studied with respect to surface dihedral angle and groove geometry. Using a cold-sintered zinc oxide densified at 200 °C as a model system, this study demonstrates an experimental methodology for the quantification of relative grain boundary energetics in cold-sintered material systems and an associated geometric model for connecting the morphological change and underlying mechanochemical phenomenon at various uniaxial pressures ranging from 70 to 475 MPa. Depending on the applied pressure, the anisotropic grain growth, normal grain growth, and coarsening of particles are distinctively observed according to the changes in the groove geometry, suggesting that the growth kinetics can be considered as a function of pressure.