کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1475693 | 991126 | 2013 | 8 صفحه PDF | دانلود رایگان |

This paper presents an experimental investigation on the thermal expansion behaviour of β-eucryptite (E) when it is used for processing alumina/β-eucryptite (AE) or zirconia/β-eucryptite (ZE) composites. Composite materials were prepared from a β-eucryptite powder synthetised in our laboratory and commercially available alumina or zirconia nanopowders. In order to preserve the β-eucryptite crystalline phase in sintered materials, the pressureless sintered step was performed at relatively low temperatures (<1300 °C). It is experimentally shown that in well-densified oxide-based composites, the β-eucryptite lost its slightly negative thermal expansion coefficient. This behaviour could be related to compressive residual stresses applied on β-eucryptite grains due to the thermal expansion mismatch between alumina or zirconia and the β-eucryptite.
Journal: Journal of the European Ceramic Society - Volume 33, Issue 3, March 2013, Pages 531–538