Ceramic property variation as a function of water corrosion at interfaces

该项目重点了解超临界高温水对橄榄石的影响，橄榄石是橄榄石矿物系列的镁端成员，是一种新兴的工程陶瓷和上地幔的主要组成部分。主要目的是了解水的存在是如何影响晶界特征分布的，以及它是如何融入到forsterite结构中的（在bulk vs at界面中）。我将合成橄榄石，并使用新型电子背散射衍射（EBSD）和透射菊池衍射（TKD）技术观察界面分布，透射电子显微镜（TEM）研究界面结构，红外光谱研究氢的结合。通过了解界面结构以及它如何随含水量变化，可以扩大复辉石的应用范围，并可以更好地了解地球的结构和动力学。

This project focuses on understanding the effect of supercritical and high-temperature water on forsterite, the magnesium end-member of the olivine mineral series, an emerging engineering ceramic and major component of the upper mantle. The primary aim is to understand how the presence of water affects the grain boundary character distribution and how it incorporates into the forsterite structure (in the bulk vs at interfaces). I will synthesise forsterite and use novel electron backscatter diffraction (EBSD) and transmission Kikuchi diffraction (TKD) techniques to look at the interfacial distribution, transmission electron microscopy (TEM) to study the interfacial structure, and infrared spectroscopy to look at hydrogen incorporation. By developing an understanding of the interfacial structure and how this changes with water content, the applications of forsterite can be widened, and a greater understanding of the Earth's structure and dynamics can be achieved.