Gaseous and Aqueous Corrosion of Ceramics

本研究调查两个领域的陶瓷腐蚀，气体 与产生挥发性物质和含水物质的反应 溶解动力学 目标是确定 降解机制和每种情况下的速率控制步骤。 可能的机制范围从传输控制到 表面反应动力学 微结构退化 将研究多组分体系的氧化。 气相腐蚀动力学由热重分析法测定， 溶解动力学通过溶液分析测定， 原子吸收光谱法。 %%%% 这项研究旨在研究管理 陶瓷的腐蚀行为。 从降解机理来看， 可以制造更好的陶瓷以使退化最小化。 他们 也可为选择最佳陶瓷提供依据 一个特定的敌对环境的材料。 结果也可以 可用于陶瓷加工。

This research investigates two areas of ceramic corrosion, gaseous reactions with the production of volatile species and aqueous dissolution kinetics. The objective is to determine the degradation mechanism and the rate-controlling steps in each case. The range of possible mechanisms spans from transport control to surface reaction kinetics. Degradation of microstructure during the oxidation of multi-component systems will be investigated. Gaseous corrosion kinetics are determined by thermogravimetry, and dissolution kinetics are determined by solution analysis with atomic absorption spectroscopy. %%%% This research seeks to study the fundamentals governing the corrosion behaviors of ceramics. From the degradation mechanism, better ceramics can be fabricated to minimize degradation. They can also provide basis for the selection of an optimum ceramic material for a given hostile environment. Results may also be useful with respect to ceramic processings.