Grain size threshold for enhanced irradiation resistance in nanocrystalline and ultrafine tungsten

Autor:	O. El-Atwani, J. A. Hinks, G. Greaves, J. P. Allain, S. A. Maloy
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	He implantation TEM bubbles nanocrystalline grain boundary Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 5, Iss 5, Pp 343-349 (2017)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2017.1292326
Popis:	Nanocrystalline metals are considered highly radiation-resistant materials due to their large grain boundary areas. Here, the existence of a grain size threshold for enhanced irradiation resistance in high-temperature helium-irradiated nanocrystalline and ultrafine tungsten is demonstrated. Average bubble density, projected bubble area and the corresponding change in volume were measured via transmission electron microscopy and plotted as a function of grain size for two ion fluences. Nanocrystalline grains of less than 35 nm size possess ∼10–20 times lower change in volume than ultrafine grains and this is discussed in terms of the grain boundaries defect sink efficiency.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/b983ac3ae0b54a7eb9dee1830256c0ad Zobrazit plný text záznamu View record in DOAJ