期刊论文

英文

中国有色金属学报(英文版)

1003-6326

2023

33

06

1814-1826

10.1016/S1003-6326(23)66224-7

supported by the National Natural Science Foundation of China grant number 51805181； the National Science Fund for Distinguished Young Scholars of China grant number 51725504； the Fundamental Research Funds for the Central Universities grant number 2020kfyXJJS049； the technological supports from the Analytical and Testing Center of Huazhong University of Science and Technology；

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Cu64Zr36 metallic glass powders were prepared via gas atomization.The high-temperature oxidation behavior of Cu64Zr36 metallic glass powders under the influence of internal factors(powder particle size)and external factors(oxidation temperature and oxidation time)was experimentally investigated by using XRD,DSC,TGA,SEM and TEM.The oxidation kinetics,oxide phase,surface morphology and microstructure of metallic glass powders were analyzed.The results show that Cu64Zr36 metallic glass powders form multiple layers of surface oxides after oxidation and the major components of the surface oxides ar...

本文通过气体雾化法制备了Cu64Zr36非晶合金粉末。采用XRD，DSC，TGA，SEM和TEM等测试和表征方法，研究了Cu64Zr36非晶合金粉末在内部因素（粉末粒径）和外部因素（氧化温度和氧化时间）影响下的高温氧化行为。分析了非晶合金粉末的氧化动力学、氧化物组成、表面形貌和微观组织演变。实验结果表明，Cu64Zr36非晶合金粉末氧化后表面形成多层氧化物，氧化层主要成分为t-ZrO2、m-ZrO2、Cu2O和CuO。氧化动力学遵循双级抛物线速率定律。氧化过程以O离子向内扩散和Cu离子向外扩散控制。热力学分析表明，随着粉末粒径的减小，氧化反应的吉布斯自由能变大，导致粒径更小的粉末氧化更为迅速且完全。