| 摘要: |
| 采用大气等离子体喷涂技术制备Fe-Cr-Mo-B-C-P非晶合金涂层，利用XRD和SEM检测喷涂态涂层样品的物相和形貌。通过差示扫描量热分析方法(DSC)，在不同升温速率下连续加热测得涂层的特征温度。分别利用Kissinger，Augis-Bennett和Ozawa方程计算相应的活化能(Ec和Ep)，并用Matusita–Sakka方程计算Avrami指数n进而分析晶化机制。结果表明：通过调控等离子体喷涂工艺参数可成功制备出铁基非晶涂层；随着升温速率的增大，Fe-Cr-Mo-B-C-P非晶合金涂层相应的特征温度也逐渐上升，在晶化过程中存在显著的动力学效应。 |
| 关键词: 大气等离子体喷涂 铁基非晶涂层 热稳定性 晶化动力学 |
| DOI：10.11933/j.issn.1007-9289.20181126001 |
| 分类号:TG139.8 |
| 基金项目:国家自然科学基金(51302299，51772311)；上海市自然科学基金(17ZR1434700) |
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| Kinetics of Non-isothermal Crystallization of Fe-Cr-Mo-B-C-P Amorphous Alloy Coatings |
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TAN Liming1,2, YANG Kai2, YUAN Jianhui1, ZHAO Huayu2, TAO Shunyan2, DING Chuanxian2
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1.School of Materials Engineering, Shanghai University of Engineering and Technology, Shanghai 201620, China;2.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
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| Abstract: |
| Fe-Cr-Mo-B-C-P amorphous alloy coating was prepared by atmospheric plasma spraying. The phase and morphology of as-sprayed coating samples were detected by X-ray Diffractometer (XRD) and scanning electron microscope (SEM). The characteristic temperatures of the coating was measured by differential scanning thermal analysis (DSC) methods at different heating rates. The corresponding activation energy (Ec and Ep) was calculated, based on the Kissinger, Augis-bennett and Ozawa equations respectively. The Avrami index n was calculated by Matusita–Sakka equation, and the crystallization mechanism was analyzed. Results show that the Fe-based amorphous coating can be successfully prepared by controlling and optimizing the plasma spraying parameters. With the increase of the heating rate, the corresponding characteristic temperature of Fe-Cr-Mo-B-C-P amorphous coating gradually increased. There is a significant kinetic effect in the crystallization process. |
| Key words: atmospheric plasma spraying Fe-based amorphous coating thermal stability crystallization kinetics |
