Παρακαλώ χρησιμοποιήστε αυτό το αναγνωριστικό για να παραπέμψετε ή να δημιουργήσετε σύνδεσμο προς αυτό το τεκμήριο:
https://hdl.handle.net/20.500.14279/4311
Τίτλος: | Softening of ultra-nanocrystalline diamond at low grain sizes | Συγγραφείς: | Remediakis, Ioannis N. Kopidakis, Georgios Kelires, Pantelis C. |
Major Field of Science: | Engineering and Technology | Field Category: | Materials Engineering | Λέξεις-κλειδιά: | Nanocrystalline materials;Carbon and graphite;Hardness | Ημερομηνία Έκδοσης: | 2008 | Πηγή: | Acta Materialia, 2008, vol. 56, iss. 18, pp. 5340-5344 | Volume: | 56 | Issue: | 18 | Start page: | 5340 | End page: | 5344 | Περιοδικό: | Acta Materialia | Περίληψη: | Ultra-nanocrystalline diamond is a polycrystalline material with crystalline diamond grains in the nanometer size regime. We study the structure and mechanical properties of this material as a function of the average grain size, employing atomistic simulations. From the calculated elastic constants and the estimated hardness, we observe softening of the material as the size of its grains decreases. We attribute the observed softening to the enhanced fraction of interfacial atoms as the average grain size becomes smaller. We provide a fitting formula for the scaling of the cohesive energy and bulk modulus with respect to the average grain size. We find that both these properties scale as quadratic polynomials of the inverse grain size. Our formulas yield correct values for bulk diamond in the limit of large grain sizes. | URI: | https://hdl.handle.net/20.500.14279/4311 | ISSN: | 13596454 | DOI: | 10.1016/j.actamat.2008.07.014 | Rights: | © Elsevier | Type: | Article | Affiliation: | University of Crete Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
CORE Recommender
SCOPUSTM
Citations
53
checked on 9 Νοε 2023
WEB OF SCIENCETM
Citations
20
48
Last Week
0
0
Last month
0
0
checked on 29 Οκτ 2023
Page view(s)
375
Last Week
1
1
Last month
5
5
checked on 26 Σεπ 2024
Google ScholarTM
Check
Altmetric
Αυτό το τεκμήριο προστατεύεται από άδεια Άδεια Creative Commons