Effects of Si addition on the oxidation behavior of a Cu-Zr-based bulk metallic alloy

W. Kai; P. C. Kao; P. C. Lin; I. F. Ren; J. S.C. Jang

doi:10.1016/j.intermet.2010.03.005

Effects of Si addition on the oxidation behavior of a Cu-Zr-based bulk metallic alloy

W. Kai, P. C. Kao, P. C. Lin, I. F. Ren, J. S.C. Jang

Graduate Institute of Materials Science and Engineering

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

15 Scopus citations

Abstract

The effect of Si addition on the oxidation of (Cu₄₃Zr ₄₃Al₇Ag₇)_99.5Si_0.5 bulk metallic glass (CZ43S-BMG) was investigated over the temperature range of 375-500 °C in dry air. The results generally showed that the oxidation rates of the CZ43S-BMG followed a multi-stage parabolic-rate law, and the oxidation rate constants (k_p values) fluctuated with increasing temperature. It was found that the k_p values of the CZ43S-BMG were slightly slower than those of the Si-free glassy alloy (Cu₄₃Zr₄₃Al ₇Ag₇, named as CZ43-BMG). The scales formed on the CZ43S-BMG strongly depend on temperature, consisting of 3 different modifications of ZrO₂ and CuO, and minor amounts of Cu₂O (formed at T ≥ 425 °C) and Al₂O₃ (only detected at 500 °C). In addition, the glassy substrate remained amorphous nature at T ≤ 400 °C, while it transferred to the crystalline phases of Cu ₁₀Zr₇, ZrAl, and ZrSi₂ after the oxidation at higher temperatures.

Original language	English
Pages (from-to)	1994-1999
Number of pages	6
Journal	Intermetallics
Volume	18
Issue number	10
DOIs	https://doi.org/10.1016/j.intermet.2010.03.005
State	Published - Oct 2010

Keywords

B. Glasses, metallic
B. Oxidation

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10.1016/j.intermet.2010.03.005

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@article{7af999e2e0e8464b8d0a65aea7e293fb,

title = "Effects of Si addition on the oxidation behavior of a Cu-Zr-based bulk metallic alloy",

abstract = "The effect of Si addition on the oxidation of (Cu43Zr 43Al7Ag7)99.5Si0.5 bulk metallic glass (CZ43S-BMG) was investigated over the temperature range of 375-500 °C in dry air. The results generally showed that the oxidation rates of the CZ43S-BMG followed a multi-stage parabolic-rate law, and the oxidation rate constants (kp values) fluctuated with increasing temperature. It was found that the kp values of the CZ43S-BMG were slightly slower than those of the Si-free glassy alloy (Cu43Zr43Al 7Ag7, named as CZ43-BMG). The scales formed on the CZ43S-BMG strongly depend on temperature, consisting of 3 different modifications of ZrO2 and CuO, and minor amounts of Cu2O (formed at T ≥ 425 °C) and Al2O3 (only detected at 500 °C). In addition, the glassy substrate remained amorphous nature at T ≤ 400 °C, while it transferred to the crystalline phases of Cu 10Zr7, ZrAl, and ZrSi2 after the oxidation at higher temperatures.",

keywords = "B. Glasses, metallic, B. Oxidation",

author = "W. Kai and Kao, {P. C.} and Lin, {P. C.} and Ren, {I. F.} and Jang, {J. S.C.}",

note = "Funding Information: The authors are thankful for financial support by the National Science Council of Republic of China under the Grant No. of NSC-98-2221-E-019-007 and TGA equipment support by the National Taiwan Ocean University under the Grant No. of NTOU-RD972-04-03-01-01 . Special thanks are indebted to Dr. R.T. Huang in our institute and Mr. C.T. Wu in the Department of System Engineering and Science, National Tsing Hua University (Hsin-Chu, Taiwan) for their technical supports of TEM.",

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doi = "10.1016/j.intermet.2010.03.005",

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T1 - Effects of Si addition on the oxidation behavior of a Cu-Zr-based bulk metallic alloy

AU - Kai, W.

AU - Kao, P. C.

AU - Lin, P. C.

AU - Ren, I. F.

AU - Jang, J. S.C.

N1 - Funding Information: The authors are thankful for financial support by the National Science Council of Republic of China under the Grant No. of NSC-98-2221-E-019-007 and TGA equipment support by the National Taiwan Ocean University under the Grant No. of NTOU-RD972-04-03-01-01 . Special thanks are indebted to Dr. R.T. Huang in our institute and Mr. C.T. Wu in the Department of System Engineering and Science, National Tsing Hua University (Hsin-Chu, Taiwan) for their technical supports of TEM.

PY - 2010/10

Y1 - 2010/10

N2 - The effect of Si addition on the oxidation of (Cu43Zr 43Al7Ag7)99.5Si0.5 bulk metallic glass (CZ43S-BMG) was investigated over the temperature range of 375-500 °C in dry air. The results generally showed that the oxidation rates of the CZ43S-BMG followed a multi-stage parabolic-rate law, and the oxidation rate constants (kp values) fluctuated with increasing temperature. It was found that the kp values of the CZ43S-BMG were slightly slower than those of the Si-free glassy alloy (Cu43Zr43Al 7Ag7, named as CZ43-BMG). The scales formed on the CZ43S-BMG strongly depend on temperature, consisting of 3 different modifications of ZrO2 and CuO, and minor amounts of Cu2O (formed at T ≥ 425 °C) and Al2O3 (only detected at 500 °C). In addition, the glassy substrate remained amorphous nature at T ≤ 400 °C, while it transferred to the crystalline phases of Cu 10Zr7, ZrAl, and ZrSi2 after the oxidation at higher temperatures.

AB - The effect of Si addition on the oxidation of (Cu43Zr 43Al7Ag7)99.5Si0.5 bulk metallic glass (CZ43S-BMG) was investigated over the temperature range of 375-500 °C in dry air. The results generally showed that the oxidation rates of the CZ43S-BMG followed a multi-stage parabolic-rate law, and the oxidation rate constants (kp values) fluctuated with increasing temperature. It was found that the kp values of the CZ43S-BMG were slightly slower than those of the Si-free glassy alloy (Cu43Zr43Al 7Ag7, named as CZ43-BMG). The scales formed on the CZ43S-BMG strongly depend on temperature, consisting of 3 different modifications of ZrO2 and CuO, and minor amounts of Cu2O (formed at T ≥ 425 °C) and Al2O3 (only detected at 500 °C). In addition, the glassy substrate remained amorphous nature at T ≤ 400 °C, while it transferred to the crystalline phases of Cu 10Zr7, ZrAl, and ZrSi2 after the oxidation at higher temperatures.

KW - B. Glasses, metallic

KW - B. Oxidation

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DO - 10.1016/j.intermet.2010.03.005

M3 - 期刊論文

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SN - 0966-9795

VL - 18

SP - 1994

EP - 1999

JO - Intermetallics

JF - Intermetallics

IS - 10

ER -

Effects of Si addition on the oxidation behavior of a Cu-Zr-based bulk metallic alloy

Abstract

Keywords

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