کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7855356 | 1508881 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure-property relationships in thermally-annealed multi-walled carbon nanotubes
ترجمه فارسی عنوان
رابطه ساختار و اموال در نانولوله های کربنی چندبخشی حرارت داده شده
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
The mechanical properties of individual multi-walled carbon nanotubes (MWCNTs) synthesized by a catalytic chemical vapor deposition (CVD) method followed by a series of high temperature annealing steps at 1200, 1800, 2200 and 2600 °C are investigated by a manipulator tool operated inside a scanning electron microscope. To investigate the relationship between the MWCNT structure and mechanical properties, such MWCNTs with a significantly different nanostructure are separately tested in tension, and subsequently observed their nanostructure and fracture morphology by a transmission electron microscope. The results show that the thermal annealing is effective for improving both the strength and modulus of the catalytic CVD-grown MWCNTs. The MWCNTs annealed at 1800, 2200 and 2600 °C display enhancements to their strengths by factors of â¼5.4, â¼5.1 and â¼15.6, and moduli by factors of â¼5.9, â¼13.2 and â¼18.9, respectively, compared to the MWCNTs annealed at 1200 °C. This effect is associated with the degree of waviness of the graphitic planes along the nanotube axis as well as the degree of crystallinity of the MWCNTs: the strength and modulus of the MWCNTs increases with a higher degree of orientation of the 0 0 2 graphitic planes and with a lower degree of defect concentration in the MWCNT structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 66, January 2014, Pages 219-226
Journal: Carbon - Volume 66, January 2014, Pages 219-226
نویسندگان
Go Yamamoto, Keiichi Shirasu, Yo Nozaka, Yoshinori Sato, Toshiyuki Takagi, Toshiyuki Hashida,