کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474797 991100 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micro-segregations in liquid phase sintered silicon carbide ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Micro-segregations in liquid phase sintered silicon carbide ceramics
چکیده انگلیسی

The densification behaviour of LPSSiC ceramics with different amount of secondary phases was investigated during Field Assisted Sintering (FAST). In the densified materials micro-segregations were found with dimensions of several 100 μm. Sometimes such segregations were found in gas pressure sintered materials. The investigation of the state of crystallisation by EBSD and XRD revealed that these micro-segregations are connected with the formation of large YAG (Yttrium aluminium garnet) crystals. The mobility of yttrium in the grain boundaries was investigated by measuring concentration profiles in diffusion couples. The high diffusion coefficient determined at 1850 °C (10−6 cm/s) indicates that the observed segregations are caused by the crystallisation kinetics of the secondary phases during cooling.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 30, Issue 6, April 2010, Pages 1495–1501
نویسندگان
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