Direct Observation of Vacancy-Cluster-Mediated Hydride Nucleation and the Anomalous Precipitation Memory Effect in Zirconium.
dislocation
hydride
nucleation
vacancy
zirconium
Journal
Small (Weinheim an der Bergstrasse, Germany)
ISSN: 1613-6829
Titre abrégé: Small
Pays: Germany
ID NLM: 101235338
Informations de publication
Date de publication:
30 Aug 2023
30 Aug 2023
Historique:
revised:
20
08
2023
received:
11
01
2023
medline:
31
8
2023
pubmed:
31
8
2023
entrez:
31
8
2023
Statut:
aheadofprint
Résumé
Controlling the heterogeneous nucleation of new phases is of importance in tuning the microstructures and properties of materials. However, the role of vacancy-a popular defect in materials that is hard to be resolved under conventional electron microscopy-in the heterogeneous phase nucleation remains intriguing. Here, this work captures direct in situ experimental evidences that vacancy clusters promote the heterogeneous hydride nucleation and cause the anomalous precipitation memory effect in zirconium. Both interstitial and vacancy dislocation loops form after hydride dissolution. Interestingly, hydride reprecipitation only occurs on those vacancy loop decorated sites during cooling. Atomistic simulations reveal that hydrogen atoms are preferentially segregated at individual vacancy and vacancy clusters, which assist hydride nucleation, and stimulate the unusual memory effect during hydride reprecipitation. The finding breaks the traditional view on the sequence of heterogeneous nucleation sites and sheds light on the solid phase transformation related to vacancy-sensitive alloying elements.
Identifiants
pubmed: 37649223
doi: 10.1002/smll.202300319
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2300319Subventions
Organisme : National Natural Science Foundation of China
ID : 52301019
Organisme : National Natural Science Foundation of China
ID : 51922082
Organisme : National Natural Science Foundation of China
ID : 51971170
Organisme : 111 Project of China 2.0
ID : BP0618008
Organisme : Postdoctoral Innovation Talents Support Program
ID : BX20220245
Organisme : China Scholarship Council
Organisme : JSPS KAKENHI
ID : 22F22056
Organisme : JSPS KAKENHI
ID : JP21K18675
Organisme : JSPS KAKENHI
ID : JP18H05453
Organisme : JSPS KAKENHI
ID : JP17H01238
Organisme : JSPS KAKENHI
ID : JP17K18827
Organisme : Ministry of Education, Culture, Sport, Science and Technology of Japan
Organisme : Innovative Nuclear Research and Development Program
ID : JPMXD0220354500
Informations de copyright
© 2023 Wiley-VCH GmbH.
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