About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
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Presentation Title |
Elucidating the Role of Grain Boundary Networks on Grain Growth in Textured Alumina |
Author(s) |
Bryan Conry, Joel B Harley, Michael R Tonks, Michael S Kesler, Amanda Krause |
On-Site Speaker (Planned) |
Amanda Krause |
Abstract Scope |
Experimental observations of microstructure evolution often deviate from normal grain growth predictions. These deviations are often attributed to a particular grain boundary (GB) type. However, grain growth is the collective motion of many GBs, suggesting that the GB connectivity or network plays an important role in the microstructure evolution. Thermomagnetic processing is an opportunity to create different GB networks by inducing crystallographic texture. Here, we compare the grain growth behavior of textured and untextured calcia-doped alumina to evaluate the influence of the GB network on microstructure evolution. The textured alumina is prepared by slip casting in a magnetic field (9T). After heat treatments at 1600°C, electron backscattered diffraction and atomic force microscopy were used to characterize the microstructures and grain boundary energy distributions, respectively. The implications of crystallographic texture and grain boundary energy distribution on the evolution of grain size and morphology will be discussed. |