کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10629323 | 991054 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure transformation from irregular eutectic to complex regular eutectic in directionally solidified Al2O3/GdAlO3/ZrO2 ceramics by laser floating zone melting
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Directionally solidified Al2O3/GdAlO3(GAP)/ZrO2(GdSZ) ternary eutectic ceramics have been grown by laser floating zone melting. The microstructure evolution rule is investigated as a function of growth rate. The as-solidified samples present high density (>99%), smooth surface and high diameter stability free of pores and cracks. Increasing the growth rate from 4 to 100 μm/s, the microstructures undergo a transformation from “Chinese script” irregular eutectic pattern to eutectic colony and to complex regular eutectic patterns (lamellae or rods). The average interphase spacing of the “Chinese script” microstructure presents an inverse square relationship according to λ = 10.46 Ã νâ1/2, where the average interphase spacing λ has the dimension of μm and growth rate ν is in μm/s. While the interphase spacing of the complex regular microstructure is finer. The mechanisms of the microstructure evolution and the effects of ZrO2 phase on the morphology and domain size of microstructure are discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 6, May 2016, Pages 1447-1454
Journal: Journal of the European Ceramic Society - Volume 36, Issue 6, May 2016, Pages 1447-1454
نویسندگان
Weidan Ma, Jun Zhang, Haijun Su, Qun Ren, Bin Yao, Lin Liu, Hengzhi Fu,