Radiation induced nanovoid shrinkage in Cu at room temperature: An in situ study

Journal Article · Thu Mar 21 00:00:00 EDT 2019 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2019.02.046· OSTI ID:1503249

Fan, C. ^[1]; Sreekar, A. R. G. ^[1]; Shang, Z. ^[1]; Li, Jin ^[1]; Li, M. ^[2]; Wang, H. ^[1]; El-Azab, A. ^[1]; Zhang, X. ^[1]

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1. Purdue Univ., West Lafayette, IN (United States)
2. Argonne National Lab. (ANL), Argonne, IL (United States)

Radiation induced void swelling is widely observed in a variety of metallic materials. Here, by using sputtering deposition technique, we have introduced faceted nanovoids into Cu films. In-situ Kr ion irradiation was subsequently performed at room temperature to investigate the evolution of nanovoids. Most nanovoids found to shrink gradually with increasing dose. Irradiation induced high-density vacancy clusters exist mostly in the formof stacking fault tetrahedrons. Phase fieldmodeling reveales that void shrinkage arises from biased absorption of interstitials. These findings provide insights to the physical mechanisms of radiation response of nanovoids in metallic materials.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: Office of Naval Research; USDOE Office of Nuclear Energy (NE)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1503249
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: C Vol. 166; ISSN 1359-6462
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Nanovoids
in situ radiation
phase-field modeling
stacking fault tetrahedron
void shrinkage