Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Phase decomposition in nanocrystalline Cr0.8Cu0.2 thin films

Chakraborty, J., Harzer, T. P., Duarte, M. J., & Dehm, G. (2021). Phase decomposition in nanocrystalline Cr0.8Cu0.2 thin films. Journal of Alloys and Compounds, 888: 161391. doi:10.1016/j.jallcom.2021.161391.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Dateien

einblenden: Dateien
ausblenden: Dateien
:
Phase decomposition in nanocrystalline Cr0.8Cu0.pdf (Verlagsversion), 9MB
Name:
Phase decomposition in nanocrystalline Cr0.8Cu0.pdf
Beschreibung:
Open Access
OA-Status:
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
2021
Copyright Info:
Elsevier B.V. All rights reserved.

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Chakraborty, J.1, Autor
Harzer, Tristan Philipp2, Autor           
Duarte, Maria Jazmin3, Autor           
Dehm, Gerhard4, Autor           
Affiliations:
1Materials Engineering Division, National Metallurgical Laboratory, Council of Scientific and Industrial Research, P.O. Burmamines, Jamshedpur 831007, India, ou_persistent22              
2Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863399              
3Nanotribology, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863402              
4Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863398              

Inhalt

einblenden:
ausblenden:
Schlagwörter: Cu-Cr, phase decomposition, XRD, stress, texture
 Zusammenfassung: Metastable Cr0.8Cu0.2 alloy thin films with nominal thickness of 360 nm have been deposited on Si(100) substrate by co-evaporation of Cu and Cr using molecular beam epitaxy (MBE). Phase evolution, microstructure, stress development, and crystallographic texture in Cr0.8Cu0.2 thin films have been investigated by X-ray diffraction (XRD), atom probe tomography (APT) and transmission electron microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDS) during annealing of the films in the temperature range 200–450 °C. X-ray diffraction of the as-deposited thin film shows single phase bcc crystal structure of the film whereas APT observation of fine precipitates in the film matrix due to inherent compositional fluctuation indicates onset of phase separation via spinodal decomposition regime. XRD (in-situ) and APT investigation of 300 °C annealed film reveals that the early stage of phase separation involves localized formation of metastable intermediate bcc precipitate phase having 60 at% Cr and 40 at% Cu approximately (~Cr0.6Cu0.4). For longer duration of annealing at temperature ≥350 °C, such metastable bcc precipitates act as heterogeneous nucleation sites for the onset of precipitation of Cu rich fcc Cu(Cr) phase which indicates a change of phase separation mechanism from ‘spinodal decomposition’ to ‘nucleation and growth’. Annealing of the film at temperature ≥400 °C for longer duration leads to the formation of a two phase structure with Cu rich fcc precipitate phase in a Cr rich bcc matrix. Observed phase decomposition is accompanied by significant changes in the microstructure, residual stress and crystallographic texture in the Cr rich bcc film matrix which leads to the minimization of both surface and strain energies and thereby a reduction of total Gibbs free energy of the thin film. Thermodynamic model calculation has been presented in order to understand the nucleation pathway of Cu rich stable fcc Cu(Cr) precipitates via non-classical nucleation of metastable intermediate bcc Cr0.6Cu0.4 phase.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2021-08-052021-12-25
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.jallcom.2021.161391
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Journal of Alloys and Compounds
  Kurztitel : J. Alloy. Comp.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Lausanne, Switzerland : Elsevier B.V.
Seiten: - Band / Heft: 888 Artikelnummer: 161391 Start- / Endseite: - Identifikator: ISSN: 0925-8388
CoNE: https://pure.mpg.de/cone/journals/resource/954925567746