Oxidation behavior of Au-55 mol%Ti high temperature shape memory alloy during heating in Ar-50 vol%O2 environment

Hyunbo Shim; Masaki Tahara; Tomonari Inamura; Kenji Goto; Yoko Yamabe-Mitarai; Hideki Hosoda

doi:10.2320/matertrans.M2014468

Oxidation behavior of Au-55 mol%Ti high temperature shape memory alloy during heating in Ar-50 vol%O₂ environment

Hyunbo Shim, Masaki Tahara, Tomonari Inamura, Kenji Goto, Yoko Yamabe-Mitarai, Hideki Hosoda

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Oxidation behavior and subsequent phase decomposition of Au-55 mol%Ti high temperature shape memory alloy are investigated for heating oxidation up to 1773K in Ar-50 vol%O₂ using a simultaneous thermogravimetry combined with differential scanning calorimetry (TGDSC). Au-55 mol%Ti powder specimen begins to be oxidized at 802K and the oxidation reaction is most active at 1150 K. Since the oxidation start temperature is comparable to the martensitic transformation temperatures, the oxidation must be a problem for practical high-temperature long-term applications. An equilibrium phase reaction appears near 1346K which is melting of Au produced by the reaction of AuTi + O₂→Au + TiO₂. The oxidation reaction and products assessed by the TG-DSC measurement are in good agreement with those obtained by X-ray diffraction analysis.

Original language	English
Pages (from-to)	600-604
Number of pages	5
Journal	Materials Transactions
Volume	56
Issue number	4
DOIs	https://doi.org/10.2320/matertrans.M2014468
Publication status	Published - 2015
Externally published	Yes

Keywords

AuTi
High temperature shape memory alloy
Oxidation behavior
Thermogravimetry-differential scanning calorimetry (TG-DSC) measurement

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.2320/matertrans.M2014468

Cite this

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title = "Oxidation behavior of Au-55 mol%Ti high temperature shape memory alloy during heating in Ar-50 vol%O2 environment",

abstract = "Oxidation behavior and subsequent phase decomposition of Au-55 mol%Ti high temperature shape memory alloy are investigated for heating oxidation up to 1773K in Ar-50 vol%O2 using a simultaneous thermogravimetry combined with differential scanning calorimetry (TGDSC). Au-55 mol%Ti powder specimen begins to be oxidized at 802K and the oxidation reaction is most active at 1150 K. Since the oxidation start temperature is comparable to the martensitic transformation temperatures, the oxidation must be a problem for practical high-temperature long-term applications. An equilibrium phase reaction appears near 1346K which is melting of Au produced by the reaction of AuTi + O2→Au + TiO2. The oxidation reaction and products assessed by the TG-DSC measurement are in good agreement with those obtained by X-ray diffraction analysis.",

keywords = "AuTi, High temperature shape memory alloy, Oxidation behavior, Thermogravimetry-differential scanning calorimetry (TG-DSC) measurement",

author = "Hyunbo Shim and Masaki Tahara and Tomonari Inamura and Kenji Goto and Yoko Yamabe-Mitarai and Hideki Hosoda",

note = "Publisher Copyright: {\textcopyright} 2014 The Japan Institute of Metals and Materials.",

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volume = "56",

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T1 - Oxidation behavior of Au-55 mol%Ti high temperature shape memory alloy during heating in Ar-50 vol%O2 environment

AU - Shim, Hyunbo

AU - Tahara, Masaki

AU - Inamura, Tomonari

AU - Goto, Kenji

AU - Yamabe-Mitarai, Yoko

AU - Hosoda, Hideki

PY - 2015

Y1 - 2015

N2 - Oxidation behavior and subsequent phase decomposition of Au-55 mol%Ti high temperature shape memory alloy are investigated for heating oxidation up to 1773K in Ar-50 vol%O2 using a simultaneous thermogravimetry combined with differential scanning calorimetry (TGDSC). Au-55 mol%Ti powder specimen begins to be oxidized at 802K and the oxidation reaction is most active at 1150 K. Since the oxidation start temperature is comparable to the martensitic transformation temperatures, the oxidation must be a problem for practical high-temperature long-term applications. An equilibrium phase reaction appears near 1346K which is melting of Au produced by the reaction of AuTi + O2→Au + TiO2. The oxidation reaction and products assessed by the TG-DSC measurement are in good agreement with those obtained by X-ray diffraction analysis.

AB - Oxidation behavior and subsequent phase decomposition of Au-55 mol%Ti high temperature shape memory alloy are investigated for heating oxidation up to 1773K in Ar-50 vol%O2 using a simultaneous thermogravimetry combined with differential scanning calorimetry (TGDSC). Au-55 mol%Ti powder specimen begins to be oxidized at 802K and the oxidation reaction is most active at 1150 K. Since the oxidation start temperature is comparable to the martensitic transformation temperatures, the oxidation must be a problem for practical high-temperature long-term applications. An equilibrium phase reaction appears near 1346K which is melting of Au produced by the reaction of AuTi + O2→Au + TiO2. The oxidation reaction and products assessed by the TG-DSC measurement are in good agreement with those obtained by X-ray diffraction analysis.

KW - AuTi

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KW - Oxidation behavior

KW - Thermogravimetry-differential scanning calorimetry (TG-DSC) measurement

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