Visualization of ultrafast melting initiated from radiation-driven defects in solids - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science Advances Année : 2019

Visualization of ultrafast melting initiated from radiation-driven defects in solids

Résumé

Materials exposed to extreme radiation environments such as fusion reactors or deep spaces accumulate substantial defect populations that alter their properties and subsequently the melting behavior. The quantitative characterization requires visualization with femtosecond temporal resolution on the atomic-scale length through measurements of the pair correlation function. Here, we demonstrate experimentally that electron diffraction at relativistic energies opens a new approach for studies of melting kinetics. Our measurements in radiation-damaged tungsten show that the tungsten target subjected to 10 displacements per atom of damage undergoes a melting transition below the melting temperature. Two-temperature molecular dynamics simulations reveal the crucial role of defect clusters, particularly nanovoids, in driving the ultrafast melting process observed on the time scale of less than 10 ps. These results provide new atomic-level insights into the ultrafast melting processes of materials in extreme environments.
Fichier principal
Vignette du fichier
aaw0392.pdf (2.74 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03551365 , version 1 (14-02-2024)

Identifiants

Citer

Mianzhen Mo, Samuel T. Murphy, Zhijiang Chen, Paul C. M. Fossati, Renkai Li, et al.. Visualization of ultrafast melting initiated from radiation-driven defects in solids. Science Advances , 2019, 5 (5), ⟨10.1126/sciadv.aaw0392⟩. ⟨hal-03551365⟩
27 Consultations
2 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More