Entropic phase transformation in nanocrystalline high entropy oxides

Autor:	Alexander D. Dupuy, Xin Wang, Julie M. Schoenung
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	High entropy oxide (HEO) spark plasma sintering (SPS) phase transformation nanocrystallinity length-scale effects Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 7, Iss 2, Pp 60-67 (2019)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2018.1554605
Popis:	High entropy oxide (HEO) materials display a reversible entropy-driven phase transformation that gives rise to a phase state consisting of the entropic single-phase and controllable volume fractions of a secondary phase, which we call the ‘phase spectrum’. Consolidated HEO samples were prepared with grain sizes spanning several orders of magnitude and were heat treated to demonstrate the dramatic effect that grain size has on controlling the phase spectrum behavior. The volume fraction and morphology of the secondary phase, determined here to be a Cu-rich multicomponent tenorite phase, and the corresponding heat treatment conditions were significantly influenced by the grain size.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/5192b80990f546ba98ab61d634f2c772 Zobrazit plný text záznamu View record in DOAJ