Self-repair by stress-induced diffusion of noble elements during oxidation of Zr48Cu36Al8Ag8 bulk metallic glass

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Long-term oxidation behavior of Zr48Cu36Al8Ag8 BMG under atmospheric conditions at 600 K was investigated using in-situ X-ray diffraction analysis. Two oxide zones develop: an outer oxide zone (OOZ), consisting of a stratified distribution of CuOx, Ag, and ZrO2, and an inner oxide zone (IOZ) consisting of tetragonal ZrO2 showing Cu-enriched lines inclined to the surface. The stratified microstructure in the OOZ and the Cu enrichments in the IOZ are ascribed to micro-cracks resulting from the compressive stresses induced by ZrO2 formation. Segregation of noble elements towards these oxidation-generated free surfaces “repairs” the micro-cracks and can consistently explain the microstructural features.
Original languageEnglish
JournalScripta Materialia
Volume164
Pages (from-to)126-129
ISSN1359-6462
DOIs
Publication statusPublished - 2019

Keywords

  • Zr-Cu-Al-Ag BMG
  • Long-term oxidation behavior
  • In-situ X-ray diffraction
  • Oxide zones characterization

Cite this

@article{8992d98a2a6646bd8e1bef6d65aad764,
title = "Self-repair by stress-induced diffusion of noble elements during oxidation of Zr48Cu36Al8Ag8 bulk metallic glass",
abstract = "Long-term oxidation behavior of Zr48Cu36Al8Ag8 BMG under atmospheric conditions at 600 K was investigated using in-situ X-ray diffraction analysis. Two oxide zones develop: an outer oxide zone (OOZ), consisting of a stratified distribution of CuOx, Ag, and ZrO2, and an inner oxide zone (IOZ) consisting of tetragonal ZrO2 showing Cu-enriched lines inclined to the surface. The stratified microstructure in the OOZ and the Cu enrichments in the IOZ are ascribed to micro-cracks resulting from the compressive stresses induced by ZrO2 formation. Segregation of noble elements towards these oxidation-generated free surfaces “repairs” the micro-cracks and can consistently explain the microstructural features.",
keywords = "Zr-Cu-Al-Ag BMG, Long-term oxidation behavior, In-situ X-ray diffraction, Oxide zones characterization",
author = "Saber Haratian and Grumsen, {Flemming B.} and Matteo Villa and Christiansen, {Thomas L.} and Somers, {Marcel A.J.}",
year = "2019",
doi = "10.1016/j.scriptamat.2019.01.045",
language = "English",
volume = "164",
pages = "126--129",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Pergamon Press",

}

TY - JOUR

T1 - Self-repair by stress-induced diffusion of noble elements during oxidation of Zr48Cu36Al8Ag8 bulk metallic glass

AU - Haratian, Saber

AU - Grumsen, Flemming B.

AU - Villa, Matteo

AU - Christiansen, Thomas L.

AU - Somers, Marcel A.J.

PY - 2019

Y1 - 2019

N2 - Long-term oxidation behavior of Zr48Cu36Al8Ag8 BMG under atmospheric conditions at 600 K was investigated using in-situ X-ray diffraction analysis. Two oxide zones develop: an outer oxide zone (OOZ), consisting of a stratified distribution of CuOx, Ag, and ZrO2, and an inner oxide zone (IOZ) consisting of tetragonal ZrO2 showing Cu-enriched lines inclined to the surface. The stratified microstructure in the OOZ and the Cu enrichments in the IOZ are ascribed to micro-cracks resulting from the compressive stresses induced by ZrO2 formation. Segregation of noble elements towards these oxidation-generated free surfaces “repairs” the micro-cracks and can consistently explain the microstructural features.

AB - Long-term oxidation behavior of Zr48Cu36Al8Ag8 BMG under atmospheric conditions at 600 K was investigated using in-situ X-ray diffraction analysis. Two oxide zones develop: an outer oxide zone (OOZ), consisting of a stratified distribution of CuOx, Ag, and ZrO2, and an inner oxide zone (IOZ) consisting of tetragonal ZrO2 showing Cu-enriched lines inclined to the surface. The stratified microstructure in the OOZ and the Cu enrichments in the IOZ are ascribed to micro-cracks resulting from the compressive stresses induced by ZrO2 formation. Segregation of noble elements towards these oxidation-generated free surfaces “repairs” the micro-cracks and can consistently explain the microstructural features.

KW - Zr-Cu-Al-Ag BMG

KW - Long-term oxidation behavior

KW - In-situ X-ray diffraction

KW - Oxide zones characterization

U2 - 10.1016/j.scriptamat.2019.01.045

DO - 10.1016/j.scriptamat.2019.01.045

M3 - Journal article

VL - 164

SP - 126

EP - 129

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -