Air-oxidation behavior of a [(Co50Cr15Mo 14C15B6)97.5Er2.5] 93Fe7 bulk metallic glass at 600 ~ 700 °c

被引：0

作者：

Wu, Y.H. ^{[1
]}

Kai, W. ^{[1
]}

Liaw, P.K. ^{[2
]}

机构：

[1] 1 Institute of Materials Engineering, National Taiwan Ocean University, Taiwan

[2] Department of Materials Science and Engineering, University of Tennessee, United States

来源：

Journal of Chinese Corrosion Engineering | 2012年 / 26卷 / 04期

关键词：

Cobalt alloys - Chromium compounds - Metallic glass - Glass - Oxidation resistance - Amorphous alloys - Oxidation - Rate constants;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Air-oxidation behavior of a [(Co50Cr15Mo 14C15B6)97.5Er2.5] 93Fe7 bulk metallic glass (Co7- BMG)was studied over the temperature range of 600 ~ 700 °C. The results showed that the oxidation kinetics of Co-BMG followed the parabolic-rate law, and the oxidation rate constants (ks) increased with increasing temperature. It was found that the oxidation rates of the amorphous alloy were slower than those of pure cobalt by at least 3.8 orders of magnitude, indicating a better oxidation resistance of the Co7-BMG. The scales formed on the Co7-BMG consisted of CoO, Co3O4, CoMoO4, Cr2O3 and uncorroded Co3B. The formation of Co3B indicated that the crystallization of the amorphous substrate occurred during oxidation. It was very likely that the formation of CoMoO4 and Cr2O 3 was responsible for the significant reductions in oxidation rate for the Co7-BMG, as compared to the greater oxidation rates of pure Co.

引用

页码：173 / 180