کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1643408 1517253 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication of textured Si3N4 ceramics with β-Si3N4 powders as raw material by gel-casting under strong magnetic field
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Fabrication of textured Si3N4 ceramics with β-Si3N4 powders as raw material by gel-casting under strong magnetic field
چکیده انگلیسی


• We make the textured Si3N4 ceramics by gel-casting under the magnetic field firstly.
• High degree of texture was obtained by using the beta-Si3N4 as raw powders under the magnetic field of 6 T.
• The sintering temperature can promote the orientation of grains. With the increase of sintering temperature, the degree of texture of the sample increases from 0.74 at 1700 °C to 0.81 at 1800 °C.
• The bending strength of the Si3N4 ceramic depends on the orientation of grains.

The textured Si3N4 ceramics with β-Si3N4 powders as raw material were fabricated by gel-casting under a strong magnetic field of 6 T and subsequent pressureless sintering. The results show that the a or b-axis of β-Si3N4 crystal is oriented parallel to the direction of magnetic field. The degree of texture in the green body reaches 0.72. With the increase of sintering temperature, the degree of texture in the sample increases from 0.74 at 1700 °C to 0.81 at 1800 °C. The bending strength of the Si3N4 ceramic depends on the orientation of grains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 135, 15 November 2014, Pages 218–221
نویسندگان
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