کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1580088 | 1645418 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hypersonic attenuation in cesium borate glasses: Relaxation and anharmonicity
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hypersonic attenuation in cesium borate glasses: Relaxation and anharmonicity Hypersonic attenuation in cesium borate glasses: Relaxation and anharmonicity](/preview/png/1580088.png)
چکیده انگلیسی
The internal friction and the sound velocity in a cesium borate glass (Cs2O)0.14(B2O3)0.86 were measured at ultrasonic and hypersonic frequencies by Brillouin scattering measurements over the temperature range between 15 and 300 K. The analysis of the experimental results show that, in addition to thermally activated local motions of structural defects, the vibrational anharmonicity contributes substantially to the temperatures dependences of both the hypersonic loss and velocity. It has been also proved that above 150 K the vibrational anharmonicity appears to be governed by the Akhiezer mechanism of phonon viscosity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 521–522, 15 September 2009, Pages 247–250
Journal: Materials Science and Engineering: A - Volumes 521–522, 15 September 2009, Pages 247–250
نویسندگان
Giovanni Carini Jr, Gaspare Tripodo, Lars Borjesson,