کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476892 991166 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of single-walled carbon nanotubes on thermal and electrical properties of silicon nitride processed using spark plasma sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of single-walled carbon nanotubes on thermal and electrical properties of silicon nitride processed using spark plasma sintering
چکیده انگلیسی

Si3N4 nanocomposites reinforced with 1-, 2-, and 6-vol% single-walled carbon nanotubes (SWNTs) were processed using spark plasma sintering (SPS) in order to control the thermal and electrical properties of the ceramic. Only 2-vol% SWNTs additions were used to decrease the room temperature thermal conductivity by 62% over the monolith and 6-vol% SWNTs was used to transform the insulating ceramic into a metallic electrical conductor (92 S m−1). We found that densification of the nanocomposites was inhibited with increasing SWNT concentration however, the phase transformation from α- to β-Si3N4 was not. After SPS, we found evidence of SWNT survival in addition to sintering induced defects detected by monitoring SWNT peak intensity ratios using Raman spectroscopy. Our results show that SWNTs can be used to effectively increase electrical conductivity and lower thermal conductivity of Si3N4 due to electrical transport enhancement and thermal scattering of phonons by SWNTs using SPS.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 31, Issue 3, March 2011, Pages 391–400
نویسندگان
, , , , ,