کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1463301 989645 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High performance porous Si3N4 ceramics prepared by coated pore-forming agent method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
High performance porous Si3N4 ceramics prepared by coated pore-forming agent method
چکیده انگلیسی

Coated pore-forming agent method (CPFAM) was introduced to improve the pore-forming agent method (PFAM) for the preparation of porous silicon nitride ceramics. Using SEM in combination with measurements of porosity and flexural strength, it has been found that the flexural strength of the porous silicon nitride ceramics produced with the CPFAM method is significantly higher than those without the coating process: a 100% increase in flexural strength for samples with a porosity of 50%. The porous silicon nitride ceramics also have a very low dielectric constant, which is ideal for applications in wave-transmitting systems. The enhanced mechanical strength of the silicon nitride made by the CPFAM method is a result of a more uniform distribution of the spherical pores and the formation of a dense layer of rod-like microstructures near the surface of the pores.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 35, Issue 8, December 2009, Pages 3169–3173
نویسندگان
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