Due to their high thermal resistance, their additional high tolerance to impact and shock loads and their low specific weight, fiber-reinforced non-oxide ceramics are suitable as high-performance materials for future engine components in the aerospace industry. Since aerospace components are classified as safety-critical, damage-reduced grinding of components made of fiber-reinforced non-oxide ceramics is indispensable. Although some research has already been carried out, the cause-effect relationships between the material removal mechanisms and the resulting grinding behavior, the grinding process parameters, the fiber material and the fiber orientation, considering the material properties and the geometry of the abrasive grains, are insufficiently known. Therefore, no knowledge-based grinding strategies can be derived.
The subject of this dissertation is the analysis of the material removal mechanisms during grinding of fiber-reinforced non-oxide ceramics (C/SiC, SiC/SiC) depending on the grinding process state variables for different fiber materials, fiber orientations and grinding process parameters.
The analyzed materials were characterized using parameters to describe their structure and composition. To analyze the material removal mechanisms, single grain cutting tests were carried out as an analogous process to grinding. In the single grain cutting tests, the fiber material, the fiber orientation, the grain geometry and the cutting process parameters were systematically varied. The surface phenomena were characterized using scanning electron microscope images. The peripheral zone properties were analyzed using transmission electron microscope images. The single grain cutting force was analyzed as a process state variable. To analyze the process state variables at higher spatial and temporal resolution during the single grain cutting, a numerical model was created and analyzed. The analyzed cause-effect relationships between the process input, state and resulting variables were combined in a model for the material removal behavior of fiber-reinforced non-oxide ceramics. The findings from the single grain cutting tests were qualitatively transferred to the grinding process through systematic grinding investigations on monolithic and fiber-reinforced non-oxide ceramics. Thus, this dissertation Confraters to the understanding of the material removal behavior during grinding of fiber-reinforced non-oxide ceramics.
Autor | Prinz, Sebastian |
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Gewicht | 0.287 kg |
Erscheinungsdatum | 04.08.2025 |
Fertigungstechnik
Material Removal Behavior during Grinding of Fiber-Reinforced Non-Oxide Ceramics
Kurzbeschreibung
In the present research work, a heuristic model was developed through experimental single grain cutting and grinding tests as well as numerical simulations, which describes, explains and predicts the cause-effect relationships between process state variables and the material removal mechanisms during grinding of fiber-reinforced non-oxide ceramics, depending on the fiber material, fiber orientation and grinding process parameters.