Oxidation behavior of Zr-Y alloyed Mo-Si-B based alloys

Tao Yang; Xiping Guo

doi:10.1016/j.ijrmhm.2020.105200

Oxidation behavior of Zr-Y alloyed Mo-Si-B based alloys

Tao Yang, Xiping Guo

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

10 Scopus citations

Abstract

Three Mo-Si-B based alloys (Mo-12Si-10B, Mo-12Si-10B-1Zr and Mo-12Si-10B-1Zr-0.3Y (at.%)) were fabricated to study the effects of Zr and especially further addition of Y on the oxidation behaviors of alloys at 1250 °C. Mo-12Si-10B alloy shows good oxidation resistance due to the formation of a protective SiO₂ layer. However, as the result of the phase transformation of ZrO₂, triggering the breaking up of the protective SiO₂ layer, the addition of 1 at.% Zr (Mo-12Si-10B-1Zr alloy) leads to the catastrophic oxidation behavior. Further addition of 0.3 at.% Y (Mo-12Si-10B-1Zr-0.3Y alloy) eliminates this detrimental effect of Zr alloying by promoting the formation of monomorphic ZrSiO₄ instead of polymorphic ZrO₂ during oxidation. Besides, at the later oxidation stage (≥20 h), a continuous and compact Y₂Si₂O₇ layer forms on the scale surface, further improving the oxidation resistance.

Original language	English
Article number	105200
Journal	International Journal of Refractory Metals and Hard Materials
Volume	88
DOIs	https://doi.org/10.1016/j.ijrmhm.2020.105200
State	Published - Apr 2020

Keywords

Mo-Si-B alloy
Oxidation
YSiO
Zr-Y alloying
ZrO
ZrSiO

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@article{11603badf9a54597ab82e315445f9019,

title = "Oxidation behavior of Zr-Y alloyed Mo-Si-B based alloys",

abstract = "Three Mo-Si-B based alloys (Mo-12Si-10B, Mo-12Si-10B-1Zr and Mo-12Si-10B-1Zr-0.3Y (at.%)) were fabricated to study the effects of Zr and especially further addition of Y on the oxidation behaviors of alloys at 1250 °C. Mo-12Si-10B alloy shows good oxidation resistance due to the formation of a protective SiO2 layer. However, as the result of the phase transformation of ZrO2, triggering the breaking up of the protective SiO2 layer, the addition of 1 at.% Zr (Mo-12Si-10B-1Zr alloy) leads to the catastrophic oxidation behavior. Further addition of 0.3 at.% Y (Mo-12Si-10B-1Zr-0.3Y alloy) eliminates this detrimental effect of Zr alloying by promoting the formation of monomorphic ZrSiO4 instead of polymorphic ZrO2 during oxidation. Besides, at the later oxidation stage (≥20 h), a continuous and compact Y2Si2O7 layer forms on the scale surface, further improving the oxidation resistance.",

keywords = "Mo-Si-B alloy, Oxidation, YSiO, Zr-Y alloying, ZrO, ZrSiO",

author = "Tao Yang and Xiping Guo",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = apr,

doi = "10.1016/j.ijrmhm.2020.105200",

language = "英语",

volume = "88",

journal = "International Journal of Refractory Metals and Hard Materials",

issn = "0263-4368",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Oxidation behavior of Zr-Y alloyed Mo-Si-B based alloys

AU - Yang, Tao

AU - Guo, Xiping

PY - 2020/4

Y1 - 2020/4

N2 - Three Mo-Si-B based alloys (Mo-12Si-10B, Mo-12Si-10B-1Zr and Mo-12Si-10B-1Zr-0.3Y (at.%)) were fabricated to study the effects of Zr and especially further addition of Y on the oxidation behaviors of alloys at 1250 °C. Mo-12Si-10B alloy shows good oxidation resistance due to the formation of a protective SiO2 layer. However, as the result of the phase transformation of ZrO2, triggering the breaking up of the protective SiO2 layer, the addition of 1 at.% Zr (Mo-12Si-10B-1Zr alloy) leads to the catastrophic oxidation behavior. Further addition of 0.3 at.% Y (Mo-12Si-10B-1Zr-0.3Y alloy) eliminates this detrimental effect of Zr alloying by promoting the formation of monomorphic ZrSiO4 instead of polymorphic ZrO2 during oxidation. Besides, at the later oxidation stage (≥20 h), a continuous and compact Y2Si2O7 layer forms on the scale surface, further improving the oxidation resistance.

AB - Three Mo-Si-B based alloys (Mo-12Si-10B, Mo-12Si-10B-1Zr and Mo-12Si-10B-1Zr-0.3Y (at.%)) were fabricated to study the effects of Zr and especially further addition of Y on the oxidation behaviors of alloys at 1250 °C. Mo-12Si-10B alloy shows good oxidation resistance due to the formation of a protective SiO2 layer. However, as the result of the phase transformation of ZrO2, triggering the breaking up of the protective SiO2 layer, the addition of 1 at.% Zr (Mo-12Si-10B-1Zr alloy) leads to the catastrophic oxidation behavior. Further addition of 0.3 at.% Y (Mo-12Si-10B-1Zr-0.3Y alloy) eliminates this detrimental effect of Zr alloying by promoting the formation of monomorphic ZrSiO4 instead of polymorphic ZrO2 during oxidation. Besides, at the later oxidation stage (≥20 h), a continuous and compact Y2Si2O7 layer forms on the scale surface, further improving the oxidation resistance.

KW - Mo-Si-B alloy

KW - Oxidation

KW - YSiO

KW - Zr-Y alloying

KW - ZrO

KW - ZrSiO

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U2 - 10.1016/j.ijrmhm.2020.105200

DO - 10.1016/j.ijrmhm.2020.105200

M3 - 文章

AN - SCOPUS:85077949177

SN - 0263-4368

VL - 88

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

M1 - 105200

ER -

Oxidation behavior of Zr-Y alloyed Mo-Si-B based alloys

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Keywords

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