کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1634982 1007008 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Densification, microstructure, and fracture behavior of TiC/Si3N4 composites by spark plasma sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Densification, microstructure, and fracture behavior of TiC/Si3N4 composites by spark plasma sintering
چکیده انگلیسی
TiC/Si3N4 composites were prepared using the β-Si3N4 powder synthesized by self-propagating high-temperature synthesis (SHS) and 35 wt.% TiC by spark plasma sintering. Y2O3 and Al2O3 were added as sintering additives. The almost full sintered density and the highest fracture toughness (8.48 MPa·m½) values of Si3N4-based ceramics could be achieved at 1550°C. No interfacial interactions were noticeable between TiC and Si3N4. The toughening mechanisms in TiC/Si3N4 composites were attributed to crack deflection, microcrack toughening, and crack impedance by the periodic compressive stress in the Si3N4 matrix. However, increasing microcracks easily led to excessive connection of microcracks, which would not be beneficial to the strength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rare Metals - Volume 27, Issue 3, June 2008, Pages 315-319
نویسندگان
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