Abstract
Air oxidation behavior of a (Zr55Cu30Al10Ni5)98Er2 bulk metallic glass was studied at 350–450 °C. The results showed that the oxidation kinetics of the alloy followed a multi-stage parabolic rate law, and the parabolic rate constants at the steady-state stage increased with temperature. The oxidation rates of the alloy were higher than those of the Zr55Cu30Al10Ni5 glassy alloy, indicative of poor oxidation resistance for the Er-containing alloy. The scales formed on the (Zr55Cu30Al10Ni5)98Er2 alloy consisted mostly of tetragonal ZrO2 and minor monoclinic ZrO2 and CuO at 350 °C, while Cu2O and Er2O3 were present at T > 400 °C.
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Acknowledgments
The authors are thankful for the partial financial support of the National Science Council of The Republic of China under the Grant Nos. of NSC 94-2218-E-110-009 and 98-2221-E-019-007. This work was performed using the SEM and TGA equipment supported by grant Nos. of NTOU AF94-04-03-01-01 and RD97-04-03-01-01. Special gratitude is due to Mr. C.T. Wu in the Department of System Engineering and Science, National Tsing Hua University (Hsin-chu, Taiwan), for his assistance on TEM operations.
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Kai, W., Ren, I.F., Chen, W.S. et al. The Effect of Er Addition on the Air-Oxidation of a Zr55Cu30Al10Ni5-Based Bulk Metallic Glass. Oxid Met 81, 453–465 (2014). https://doi.org/10.1007/s11085-013-9457-0
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DOI: https://doi.org/10.1007/s11085-013-9457-0