Air-oxidation of a Co-based amorphous ribbon at 400-600 °c

W. Kai; P. C. Lin; W. S. Chen; P. C. Kao; R. T. Huang; P. K. Liaw

doi:10.1016/j.jallcom.2010.12.053

Air-oxidation of a Co-based amorphous ribbon at 400-600 °c

W. Kai^*, P. C. Lin, W. S. Chen, P. C. Kao, R. T. Huang, P. K. Liaw

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

The oxidation behavior of a commercial Co₆₉B₁₂Si ₁₂Fe₄Mo₂Ni₁ amorphous ribbon (Co6-AR) was studied over the temperature range of 400-600 °C in dry air. The results showed that virtually no oxidation occurred at 400 °C. On the other hand, the oxidation kinetics of the Co6-AR alloy at 450-600 °C generally followed a multi-stage parabolic-rate law, and the parabolic-rate constants (k_p values) tend to increase with increasing temperature. It was found that the oxidation rates of the glassy alloy are slower than those of pure Co, indicative of a better oxidation resistance. An exclusive scale of CoO was observed after the oxidation of the glassy alloy in the temperature range of interest, and several crystalline phases formed on the substrate beneath the scale, consisting of pure Co (both FCC and HCP structures), Co ₃B, Co₂Si, CoFe, and Co₂B (absent at 450 °C), which indicated the occurrence of crystallization. © 2010 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.2010.12.053
Publication status	Published - 14 Jul 2011
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Co69B12Si12Fe4Mo 2Ni1 amorphous ribbon
CoO
Oxidation

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title = "Air-oxidation of a Co-based amorphous ribbon at 400-600 °c",

abstract = "The oxidation behavior of a commercial Co69B12Si 12Fe4Mo2Ni1 amorphous ribbon (Co6-AR) was studied over the temperature range of 400-600 °C in dry air. The results showed that virtually no oxidation occurred at 400 °C. On the other hand, the oxidation kinetics of the Co6-AR alloy at 450-600 °C generally followed a multi-stage parabolic-rate law, and the parabolic-rate constants (kp values) tend to increase with increasing temperature. It was found that the oxidation rates of the glassy alloy are slower than those of pure Co, indicative of a better oxidation resistance. An exclusive scale of CoO was observed after the oxidation of the glassy alloy in the temperature range of interest, and several crystalline phases formed on the substrate beneath the scale, consisting of pure Co (both FCC and HCP structures), Co 3B, Co2Si, CoFe, and Co2B (absent at 450 °C), which indicated the occurrence of crystallization. {\textcopyright} 2010 Elsevier B.V. All rights reserved.",

keywords = "Co69B12Si12Fe4Mo 2Ni1 amorphous ribbon, CoO, Oxidation",

author = "W. Kai and Lin, {P. C.} and Chen, {W. S.} and Kao, {P. C.} and Huang, {R. T.} and Liaw, {P. K.}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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volume = "509",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Air-oxidation of a Co-based amorphous ribbon at 400-600 °c

AU - Kai, W.

AU - Lin, P. C.

AU - Chen, W. S.

AU - Kao, P. C.

AU - Huang, R. T.

AU - Liaw, P. K.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2011/7/14

Y1 - 2011/7/14

N2 - The oxidation behavior of a commercial Co69B12Si 12Fe4Mo2Ni1 amorphous ribbon (Co6-AR) was studied over the temperature range of 400-600 °C in dry air. The results showed that virtually no oxidation occurred at 400 °C. On the other hand, the oxidation kinetics of the Co6-AR alloy at 450-600 °C generally followed a multi-stage parabolic-rate law, and the parabolic-rate constants (kp values) tend to increase with increasing temperature. It was found that the oxidation rates of the glassy alloy are slower than those of pure Co, indicative of a better oxidation resistance. An exclusive scale of CoO was observed after the oxidation of the glassy alloy in the temperature range of interest, and several crystalline phases formed on the substrate beneath the scale, consisting of pure Co (both FCC and HCP structures), Co 3B, Co2Si, CoFe, and Co2B (absent at 450 °C), which indicated the occurrence of crystallization. © 2010 Elsevier B.V. All rights reserved.

AB - The oxidation behavior of a commercial Co69B12Si 12Fe4Mo2Ni1 amorphous ribbon (Co6-AR) was studied over the temperature range of 400-600 °C in dry air. The results showed that virtually no oxidation occurred at 400 °C. On the other hand, the oxidation kinetics of the Co6-AR alloy at 450-600 °C generally followed a multi-stage parabolic-rate law, and the parabolic-rate constants (kp values) tend to increase with increasing temperature. It was found that the oxidation rates of the glassy alloy are slower than those of pure Co, indicative of a better oxidation resistance. An exclusive scale of CoO was observed after the oxidation of the glassy alloy in the temperature range of interest, and several crystalline phases formed on the substrate beneath the scale, consisting of pure Co (both FCC and HCP structures), Co 3B, Co2Si, CoFe, and Co2B (absent at 450 °C), which indicated the occurrence of crystallization. © 2010 Elsevier B.V. All rights reserved.

KW - Co69B12Si12Fe4Mo 2Ni1 amorphous ribbon

KW - CoO

KW - Oxidation

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U2 - 10.1016/j.jallcom.2010.12.053

DO - 10.1016/j.jallcom.2010.12.053

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 -

Air-oxidation of a Co-based amorphous ribbon at 400-600 °c

Abstract

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