کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474370 991087 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pressureless sintered in situ toughened ZrB2–SiC platelets ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Pressureless sintered in situ toughened ZrB2–SiC platelets ceramics
چکیده انگلیسی

ZrB2–SiC composite ceramics were densified by pressureless sintering with addition of Si3N4 or MoSi2 at temperatures that induced SiC anisotropic growth from particles to platelets, within a ZrB2 matrix with rounded grains. Si3N4 addition resulted in the formation of large amounts of liquid phase which enhanced mass transfer mechanisms in terms of matrix grain growth and homogeneous distribution of SiC platelets having an aspect ratio of 3. On the contrary, MoSi2 helped the densification with local formation of liquid phases leading to a finer matrix with finer SiC platelets, though more agglomerated and with a lower aspect ratio (about 2). These different microstructures had very different fracture properties values, namely a toughness of 3.8 MPa m1/2 and a strength of 300 MPa for the Si3N4-doped composite; toughness of 5 MPa m1/2 and strength of 410 MPa for the MoSi2-doped one.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 31, Issue 12, 15 October 2011, Pages 2145–2153
نویسندگان
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