Investigation of the Structural Heterogeneity and Corrosion Performance of the Annealed Fe-Based Metallic Glasses |
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| Authors: | Dandan Liang Jo-Chi Tseng Xiaodi Liu Yuanfei Cai Gang Xu Jun Shen |
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| Affiliation: | 1.College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China; (D.L.); (J.-C.T.); (X.L.); (G.X.);2.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;3.College of Materials Science and Engineering, Tongji University, Shanghai 201804, China; |
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| Abstract: | This study investigated the structural heterogeneity, mechanical property, electrochemical behavior, and passive film characteristics of Fe–Cr–Mo–W–C–B–Y metallic glasses (MGs), which were modified through annealing at different temperatures. Results showed that annealing MGs below the glass transition temperature enhanced corrosion resistance in HCl solution owing to a highly protective passive film formed, originating from the decreased free volume and the shrinkage of the first coordination shell, which was found by pair distribution function analysis. In contrast, the enlarged first coordination shell and nanoscale crystal-like clusters were identified for MGs annealed in the supercooled liquid region, which led to a destabilized passive film and thereby deteriorated corrosion resistance. This finding reveals the crucial role of structural heterogeneity in tuning the corrosion performance of MGs. |
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| Keywords: | metallic glass synchrotron radiation heterogeneity electrochemical behavior passive film |
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