کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10626633 989694 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
R-curve behavior of Si3N4 whisker-reinforced Si3N4 matrix composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
R-curve behavior of Si3N4 whisker-reinforced Si3N4 matrix composites
چکیده انگلیسی
Three kinds of β-Si3N4 whisker-reinforced Si3N4 composites with different degree of whisker alignment were prepared by using tape casting, extrusion and hot pressing processes. Among these composites, one is obtained from a laminate with tapes, another is from a laminate stacked alternatively with tapes and extruded wires, and the last one is closely stacked with wires. The same whisker orientation was followed with all the tapes or wires. Four-point bending tests by stepped loading were employed to determine R-curves for the three materials. The results show that all the materials have better R-curve behaviors than composites with randomly oriented whiskers. The fracture toughness of the three materials are, respectively, 11.18, 11.44 and 10.60 MPa m1/2, and the corresponding threshold values for stable crack propagation are 9.14, 10.92 and 9.32 MPa m1/2, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 31, Issue 1, 2005, Pages 197-204
نویسندگان
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