English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Spinodal Decomposition in Nanocrystalline Alloys

Zhou, X., Kamachali, R. D., Boyce, B. L., Clark, B. G., Raabe, D., & Thompson, G. B. (2021). Spinodal Decomposition in Nanocrystalline Alloys. Acta Materialia, 215: 117054. doi:10.1016/j.actamat.2021.117054.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Zhou, Xuyang1, 2, Author           
Kamachali, Reza Darvishi3, Author           
Boyce, Brad L.4, Author
Clark, Blythe G.4, Author
Raabe, Dierk5, Author           
Thompson, Gregory B.6, Author           
Affiliations:
1Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
2The University of Alabama, Department of Metallurgical Materials Engineering, 35487 Tuscaloosa, AL, USA, ou_persistent22              
3Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205, Berlin, Germany, ou_persistent22              
4Sandia National Laboratories, 87123 Albuquerque, NM, USA, ou_persistent22              
5Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
6Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL, USA, ou_persistent22              

Content

show
hide
Free keywords: Binary alloys; Gold alloys; Grain boundaries; Nanocrystalline alloys; Nanocrystals; Platinum alloys; Solubility, Chemical decomposition; Grain boundary character; Grain boundary segregation; Heterogeneous landscapes; Nanocrystalline systems; Phase-field simulation; Precession electron diffractions; Transformation pathways, Spinodal decomposition
 Abstract: For more than half a century, spinodal decomposition has been a key phenomenon in considering the formation of secondary phases in alloys. The most prominent aspect of the spinodal phenomenon is the lack of an energy barrier on its transformation pathway, offering an alternative to the nucleation and growth mechanism. The classical description of spinodal decomposition often neglects the influence of defects, such as grain boundaries, on the transformation because the innate ability for like-atoms to cluster is assumed to lead the process. Nevertheless, in nanocrystalline alloys, with a high population of grain boundaries with diverse characters, the structurally heterogeneous landscape can greatly influence the chemical decomposition behavior. Combining atom-probe tomography, precession electron diffraction and density-based phase-field simulations, we address how grain boundaries contribute to the temporal evolution of chemical decomposition within the miscibility gap of a Pt-Au nanocrystalline system. We found that grain boundaries can actually have their own miscibility gaps profoundly altering the spinodal decomposition in nanocrystalline alloys. A complex realm of multiple interfacial states, ranging from competitive grain boundary segregation to barrier-free low-dimensional interfacial decomposition, occurs with a dependency upon the grain boundary character. © 2021

Details

show
hide
Language(s): eng - English
 Dates: 2021-08-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.actamat.2021.117054
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Acta Materialia
  Abbreviation : Acta Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Kidlington : Elsevier Science
Pages: - Volume / Issue: 215 Sequence Number: 117054 Start / End Page: - Identifier: ISSN: 1359-6454
CoNE: https://pure.mpg.de/cone/journals/resource/954928603100