کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5439014 | 1398190 | 2017 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lamellar-interpenetrated AlâSiâMg/Al2O3âZrO2 composites prepared by freeze casting and pressureless infiltration
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Using freeze casting and pressureless infiltration methods, we prepared lamellar AlâSiâMg/Al2O3âZrO2 composites with initial ceramic loading of 30 vol% and different Al2O3:ZrO2 weight ratios (Al2O3:ZrO2=1:9, 3:7, 5:5, 7:3 and 9:1). The resultant composites inherited the lamellar structure of the Al2O3âZrO2 scaffolds, and the thickness of both metal and ceramic layers showed a trend of first increase and then decrease with increasing Al2O3 content. During pressureless infiltration, multiple chemical reactions took place between ZrO2 and the Alâ12Siâ10Mg alloy and the main reaction products were (Al1âm, Sim)3Zr, Al2O3 and ZrSi2 phases. The degree of the reaction depended on the ZrO2 content in the ceramic composition. In general, the compressive strength of the composites decreased with increasing Al2O3 content, but three-point bending strength showed a first decrease and then increase. When Al2O3:ZrO2=1:9, the compressive and bending strength of the composites reached about 997±60 MPa and 426±10 MPa, respectively. A simple model was proposed to illustrate the fracture mode and toughening mechanism of the composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 3, 15 February 2017, Pages 3292-3297
Journal: Ceramics International - Volume 43, Issue 3, 15 February 2017, Pages 3292-3297
نویسندگان
Rui-Fen Guo, Hao-Chen Lv, Ping Shen, Zhi-Jie Hu, Qi-Chuan Jiang,