Development of Textured Mullite by Templated Grain Growth |
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| Authors: | Seong-Hyeon Hong Gary L Messing |
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| Affiliation: | Department of Materials Science and Engineering and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802 |
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| Abstract: | Highly textured mullite was obtained by enhancing anisotropic grain growth by TiO2 doping and by templating grain growth on oriented acicular mullite seed particles in a mullite precursor. Upon heating, the mullite precursor crystallized and densified to an equiaxed microstructure of 1-2 µm mullite grains at which time the mullite seed particles grew rapidly in the length direction ( c -axis) to produce a highly textured microstructure. By changing the seed (template) particle concentration, a range of oriented microstructures and anisotropic grains could be produced. |
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