Silver mushroom induced by oxidation in Cu42Zr 42Al8Ag8 metallic glasses

Ji Liang Zhang; Wen Huan Cao; Chan Hung Shek

doi:10.1016/j.jallcom.2011.01.076

Silver mushroom induced by oxidation in Cu42Zr 42Al8Ag8 metallic glasses

Ji Liang Zhang
, Wen Huan Cao
, Chan Hung Shek

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

9 Citations (Scopus)

Abstract

The oxidation behavior of Cu₄₂Zr₄₂Al ₈Ag₈ metallic glass ribbons at 633-693 K was investigated. The oxidation kinetics followed initially a parabolic rate law but change to a linear one after some time. Mushroom shaped silver crystals were observed on the surface of the oxide layer of the sample oxidized at 663 K and their formation seemed to accelerate the overall oxidation. The formation of the 'silver mushrooms' was attributed to the extrusion of silver segregated out during oxidation through weak points in the surface oxide scale. The rounded cap was thought to form due to surface tension or residual stress arising from the extrusion process. Such surface morphology is expected to be beneficial for the metallic glasses as biomaterials. © 2011 Elsevier B.V. All rights reserved.

Original language	English
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jallcom.2011.01.076
Publication status	Published - 14 Jul 2011

Research Keywords

Metallic glasses
Oxidation
TGA

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10.1016/j.jallcom.2011.01.076

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@article{cfd72f3fbe3646a78ab3f623b664c3ec,

title = "Silver mushroom induced by oxidation in Cu42Zr 42Al8Ag8 metallic glasses",

abstract = "The oxidation behavior of Cu42Zr42Al 8Ag8 metallic glass ribbons at 633-693 K was investigated. The oxidation kinetics followed initially a parabolic rate law but change to a linear one after some time. Mushroom shaped silver crystals were observed on the surface of the oxide layer of the sample oxidized at 663 K and their formation seemed to accelerate the overall oxidation. The formation of the 'silver mushrooms' was attributed to the extrusion of silver segregated out during oxidation through weak points in the surface oxide scale. The rounded cap was thought to form due to surface tension or residual stress arising from the extrusion process. Such surface morphology is expected to be beneficial for the metallic glasses as biomaterials. {\textcopyright} 2011 Elsevier B.V. All rights reserved.",

keywords = "Metallic glasses, Oxidation, TGA",

author = "Zhang, \{Ji Liang\} and Cao, \{Wen Huan\} and Shek, \{Chan Hung\}",

year = "2011",

month = jul,

day = "14",

doi = "10.1016/j.jallcom.2011.01.076",

language = "English",

volume = "509",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "SUPPL. 1",

}

TY - JOUR

T1 - Silver mushroom induced by oxidation in Cu42Zr 42Al8Ag8 metallic glasses

AU - Zhang, Ji Liang

AU - Cao, Wen Huan

AU - Shek, Chan Hung

PY - 2011/7/14

Y1 - 2011/7/14

N2 - The oxidation behavior of Cu42Zr42Al 8Ag8 metallic glass ribbons at 633-693 K was investigated. The oxidation kinetics followed initially a parabolic rate law but change to a linear one after some time. Mushroom shaped silver crystals were observed on the surface of the oxide layer of the sample oxidized at 663 K and their formation seemed to accelerate the overall oxidation. The formation of the 'silver mushrooms' was attributed to the extrusion of silver segregated out during oxidation through weak points in the surface oxide scale. The rounded cap was thought to form due to surface tension or residual stress arising from the extrusion process. Such surface morphology is expected to be beneficial for the metallic glasses as biomaterials. © 2011 Elsevier B.V. All rights reserved.

AB - The oxidation behavior of Cu42Zr42Al 8Ag8 metallic glass ribbons at 633-693 K was investigated. The oxidation kinetics followed initially a parabolic rate law but change to a linear one after some time. Mushroom shaped silver crystals were observed on the surface of the oxide layer of the sample oxidized at 663 K and their formation seemed to accelerate the overall oxidation. The formation of the 'silver mushrooms' was attributed to the extrusion of silver segregated out during oxidation through weak points in the surface oxide scale. The rounded cap was thought to form due to surface tension or residual stress arising from the extrusion process. Such surface morphology is expected to be beneficial for the metallic glasses as biomaterials. © 2011 Elsevier B.V. All rights reserved.

KW - Metallic glasses

KW - Oxidation

KW - TGA

UR - https://www.scopus.com/pages/publications/79958146735

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-79958146735&origin=recordpage

U2 - 10.1016/j.jallcom.2011.01.076

DO - 10.1016/j.jallcom.2011.01.076

M3 - RGC 21 - Publication in refereed journal

SN - 0925-8388

VL - 509

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - SUPPL. 1

ER -

Silver mushroom induced by oxidation in Cu42Zr 42Al8Ag8 metallic glasses

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