Academic Journal
Copyright © 2011 SciRes. AMPC Ultrasonic Attenuation in Calcium Oxide
| العنوان: | Copyright © 2011 SciRes. AMPC Ultrasonic Attenuation in Calcium Oxide |
|---|---|
| المؤلفون: | Jitendra Kumar, Sanjeev Kumar Shrivastava, Devraj Singh, Virendra Kumar |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://www.scirp.org/journal/PaperDownload.aspx?paperID=7632. |
| سنة النشر: | 2011 |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | Attenuation, Thermo Elastic Relaxation, Phonon-Phonon Interaction, Akheiser Loss, Gruneisen Constants |
| الوصف: | Ultrasonic attenuation studies can be used to characterize material not only after production but during proc-essing as well. The most important causes of ultrasonic attenuation in solids are electron-phonon, pho-non-phonon interaction and that due to thermo elastic relaxation. The two dominant processes that will give rise to appreciable ultrasonic attenuation at higher temperature are the phonon-phonon interaction also known as Akhiezer loss and that due to thermo elastic relaxation are observed in calcium oxide crystal. At frequencies of ultrasonic range and at higher temperatures in solids, phonon-phonon interaction mechanism is dominating cause for attenuation. Ultrasonic attenuation due to phonon-phonon interaction (α/f 2)p-p and thermo elastic relaxation (α/f 2)th are evaluated in Calcium Oxide crystal up to an elevated temperature from 100 K- 1500 K along <100>, <110> and <111> crystallographic directions. Temperature dependence of ul-trasonic attenuation along different crystallographic direction reveals some typical characteristic features. |
| نوع الوثيقة: | text |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.7911; http://www.scirp.org/journal/PaperDownload.aspx?paperID=7632 |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.7911 http://www.scirp.org/journal/PaperDownload.aspx?paperID=7632 |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.617EC793 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |