التفاصيل البيبلوغرافية
| العنوان: |
Chromium hardening and Peierls mechanism for basal slip in sapphire at temperatures between 900 and 1500 $^\circ$C |
| المؤلفون: |
Rodríguez, Miguel Castillo, Bernabé, Antonio Muñoz, Castaing, Jacques, Veyssière, Patrick, Rodríguez, Arturo Domínguez |
| سنة النشر: |
2024 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Materials Science |
| الوصف: |
The plastic deformation of Cr3+ -doped a-Al2 O3 (ruby) with four distinct Cr concentrations has been studied at temperatures between 900 and 1500 $^\circ$C. The mechanical tests indicate that the processes of dislocation multiplication and the adjustments of the slip velocity of these dislocations to the imposed strain rate in undoped a-Al2 O3 are not significantly affected by the Cr concentra%on. The yield stress increment is approximately constant with temperature and the hardening increases with the Cr concentration. The critical resolved shear stress (CRSS) is fixed to a model based on dislocation glide controlled by the nucleation and propagation of kink pairs, modified to include the hardening due to Cr. Satisfactory fits are achieved with adjustable parameters close to those employed for undoped a-Al2 O3 . |
| نوع الوثيقة: |
Working Paper |
| URL الوصول: |
http://arxiv.org/abs/2402.02443 |
| رقم الانضمام: |
edsarx.2402.02443 |
| قاعدة البيانات: |
arXiv |