Non-isothermal crystallization behavioral analysis of detonation sprayed Fe-based amorphous coating

• Published in: Journal of materials research and technology Vol. 23; pp. 6115 - 6126
• Main Authors: Zhai, Haimin, Li, Xuqiang, Zhang, Yongkang, Li, Wensheng, He, Dongqing, Cheng, Bo, Zhang, Xinjian, Viktor, Zhornik, Seniuts, Uladzimir
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-03-2023; Elsevier
• Subjects: Activation energies; Crystallization kinetics; Fe-based amorphous coating; Local Avrami exponent; Non-isothermal; Fe-based amorphous coating; Non-isothermal; Activation energies; Crystallization kinetics; Local Avrami exponent
• ISSN: 2238-7854
• DOI: 10.1016/j.jmrt.2023.02.203

The non-isothermal crystallization behaviors of a detonation sprayed Fe-based amorphous coating (AMC) was systematically investigated through differential scanning calorimetry, X-ray diffraction and transmission electron microscopy. The crystallization mechanism of the Fe-based AMC is analyzed and discussed in detail using a combination of the Kissinger-Akahira-Sunose and Ozawa-Flynn-Wall approaches, as well as the local Avrami exponent. The results indicate that the crystallization process of the Fe-based AMC is affected by the non-isothermal heating rate with a significantly higher initial crystallization activation energy (917.7 kJ mol−1) and first peak activation energy (479.6 kJ mol−1), indicating excellent thermal stability. After four stages of amorphous crystallization and phase transformation, the crystallization products of the equilibrium state were primarily composed of 78.5%, 11.3%, and 5.8% (Cr, Fe)23(C, B)6, α-Fe phases, and FeMo2B2 phases, respectively.