• Gries, Thomas
• Jung, Fabian
• Götte, Johannes
• Liu, Yiou
• Markus, Timo

Abstract

<jats:title>Abstract</jats:title><jats:p>The progression of high-temperature materials for turbines is crucial for the more efficient combustion of conventional and synthetic fuels in modern gas turbines, which is key to enhancing plant efficiency and reducing exhaust gas emissions. In this context, all-oxide ceramic matrix composites stand out due to their superior oxidation stability and temperature resistance, essential for withstanding the demanding conditions in the hot gas sections of modern turbine systems. These materials offer advantages over their metallic counterparts, including reduced cooling requirements and extended operational lifetimes. However, adapting these ceramic composites for turbine applications requires the incorporation of complex continuous fiber reinforcements, significantly increasing the ceramic’s damage tolerance. The reinforcement architecture employed presents substantial manufacturing challenges, particularly in colloidal production processes. To address this, a novel 3D-braided reinforcement architecture has been developed, enabling a near-net-shape production of continuous fiber reinforced ceramics (CFCC) through pressure slip casting technology. This approach represents a diversion from conventional CFCC manufacturing, which typically involves single-piece productions, by integrating pressure slip casting with 3D braiding for improved scalability and flexibility.</jats:p><jats:p>To evaluate the potential influence of pressure slip casted ceramic composites, comprised by an Al2O3-YSZ-RBAO matrix system and reinforcement by 3M Nextel 610 alumina fibers, on gas turbine systems, a thermomechanical model has been developed. This model is instrumental in calculating the material’s performance when applied to vital components of the gas turbine’s hot gas section. Therefore, it enables the prediction of the composite structure’s equivalent properties.</jats:p>

Topics

• impedance spectroscopy
• composite
• combustion
• oxide ceramic
• slip casting