کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477641 991191 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of GdAlO3–Al2O3 composite having fine pseudo-eutectic microstructure
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Formation of GdAlO3–Al2O3 composite having fine pseudo-eutectic microstructure
چکیده انگلیسی

GdAlO3 and Al2O3 powders were mixed and pulverized using ball mills. The prepared powder was sintered by SPS at 1450 °C without holding time. SEM observation of the sintered specimen showed a eutectic-like microstructure. This is called ‘pseudo-eutectic’ in this research. The microstructure formed from a powder pulverized by a tumbling ball mill for one week was much finer than that by a planetary ball mill for 5 and 10 h. The fine homogeneous eutectic-like (pseudo-eutectic) microstructures could be formed at both eutectic and off-eutectic compositions. In case of crystallization from a melt of eutectic components, homogeneous eutectic microstructures can be formed only at restricted compositions very close to the eutectic one. Coarse primary crystals generally exist in the eutectic microstructure at off-eutectic compositions. The pseudo-eutectic microstructures can be formed at any compositions because a mixing ratio of the starting powders can be varied.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 28, Issue 15, November 2008, Pages 2941–2946
نویسندگان
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