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Title: Solid-state dewetting instability in thermally-stable nanocrystalline binary alloys

Abstract

Practical applications of nanocrystalline metallic thin films are often limited by instabilities. Furthermore, in addition to grain growth, the thin film itself can become unstable and collapse into islands through solid-state dewetting. Additionally, selective alloying can improve nanocrystalline stability, but the impact of this approach on dewetting is not clear. In this study, two alloys that exhibit nanocrystalline thermal stability as ball milled powders are evaluated as thin films. While both alloys demonstrated dewetting behavior following annealing, the severity decreased in more dilute compositions. Ultimately, a balance may be struck between nanocrystalline stability and thin film structural stability by tuning dopant concentration.

Authors:
ORCiD logo [1];  [2];  [2];  [3]; ORCiD logo [4]
  1. Univ. of California, Irvine, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of California, Irvine, CA (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Oregon State Univ., Corvallis, OR (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1650162
Alternate Identifier(s):
OSTI ID: 1601493
Report Number(s):
SAND-2020-8365J
Journal ID: ISSN 2589-1529; 689908
Grant/Contract Number:  
AC04-94AL85000; FWP18–013170; SC0014664; NA0003525; CHE-0802913; SC0014232
Resource Type:
Accepted Manuscript
Journal Name:
Materialia
Additional Journal Information:
Journal Volume: 9; Journal ID: ISSN 2589-1529
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Solid state dewetting; sputtering; thin films; grain boundaries; nanocrystalline metal

Citation Formats

Schuler, Jennifer D., Copeland, Guild, Hattar, Khalid, Rupert, Timothy J., and Briggs, Samuel A.. Solid-state dewetting instability in thermally-stable nanocrystalline binary alloys. United States: N. p., 2020. Web. https://doi.org/10.1016/j.mtla.2020.100618.
Schuler, Jennifer D., Copeland, Guild, Hattar, Khalid, Rupert, Timothy J., & Briggs, Samuel A.. Solid-state dewetting instability in thermally-stable nanocrystalline binary alloys. United States. https://doi.org/10.1016/j.mtla.2020.100618
Schuler, Jennifer D., Copeland, Guild, Hattar, Khalid, Rupert, Timothy J., and Briggs, Samuel A.. Sun . "Solid-state dewetting instability in thermally-stable nanocrystalline binary alloys". United States. https://doi.org/10.1016/j.mtla.2020.100618. https://www.osti.gov/servlets/purl/1650162.
@article{osti_1650162,
title = {Solid-state dewetting instability in thermally-stable nanocrystalline binary alloys},
author = {Schuler, Jennifer D. and Copeland, Guild and Hattar, Khalid and Rupert, Timothy J. and Briggs, Samuel A.},
abstractNote = {Practical applications of nanocrystalline metallic thin films are often limited by instabilities. Furthermore, in addition to grain growth, the thin film itself can become unstable and collapse into islands through solid-state dewetting. Additionally, selective alloying can improve nanocrystalline stability, but the impact of this approach on dewetting is not clear. In this study, two alloys that exhibit nanocrystalline thermal stability as ball milled powders are evaluated as thin films. While both alloys demonstrated dewetting behavior following annealing, the severity decreased in more dilute compositions. Ultimately, a balance may be struck between nanocrystalline stability and thin film structural stability by tuning dopant concentration.},
doi = {10.1016/j.mtla.2020.100618},
journal = {Materialia},
number = ,
volume = 9,
place = {United States},
year = {2020},
month = {3}
}

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