کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
703747 1460822 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical dissipation at elevated temperatures in tetrahedral amorphous carbon oscillators
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Mechanical dissipation at elevated temperatures in tetrahedral amorphous carbon oscillators
چکیده انگلیسی

We have measured the temperature dependence of mechanical dissipation in tetrahedral amorphous carbon flexural and torsional resonators over the temperature range from 300 to 1023 K. The mechanical dissipation was found to be controlled by defects within the material, and the magnitude and temperature dependence of the dissipation were found to depend on whether flexural or torsional vibrational modes were excited. The defects that were active under flexural stresses have a relatively flat concentration from 0.4 to 0.7 eV with an ever increasing defect concentration up to 1.9 eV. Under shear stresses (torsion), the defect activation energies increase immediately beginning at 0.4 eV, with increasing defect concentration at higher energies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Diamond and Related Materials - Volume 15, Issues 2–3, February–March 2006, Pages 309–312
نویسندگان
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