Microstructure development and phase evolution of alumina-mullite nanocomposite
In this work, alumina-mullite composites (5-15 vol.%) were prepared using sol-gel derived alumina composite nanopowders. The results revealed the formation of intragranular and intergranular mullites inside and between the alumina grains, respectively. Accordingly, the intragranular mullite...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Institute for the Science of Sintering, Beograd
2013-01-01
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| Series: | Science of Sintering |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0350-820X/2013/0350-820X1303293S.pdf |
| Summary: | In this work, alumina-mullite composites (5-15 vol.%) were prepared using
sol-gel derived alumina composite nanopowders. The results revealed the
formation of intragranular and intergranular mullites inside and between the
alumina grains, respectively. Accordingly, the intragranular mullites
(average grain size, 0.3 μm) were smaller than the intergranular mullites
(average grain size, 0.5 μm). Moreover, the alumina grains (average grain
size, 1.0 μm) are larger than the mullites. Meanwhile, the mullites showed
positive results in the prevention of the alumina grains growth and the
retardation of densification. The relative density of alumina-15 vol.%
mullite that was sintered at 1650°C for 2 h, was obtained as 98.7 %. After
sintering at 1750°C for 2 h, the mullite was decomposed. |
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| ISSN: | 0350-820X 1820-7413 |