FeNiCoCrMo0.5Al1.3高的合金粉的氧化行为
Anton Semikolenov1,2, Mikhail Goshkoderya3, Tigran Uglunts1
1Institute of Machinery, Materials and Transport, Peter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, Russia.
Materials (Basel, Switzerland)
|January 26, 2024
概括
由FeNiCoCrMoAl高合金粉末制成的保护涂层是使用高速氧气燃料喷雾制造的. 飞行中的氧化显著影响了涂层特性,化导致了大幅度的强化.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 表面工程是什么?表面工程是什么?
背景情况:
- 基于FeNiCoCrMoAl的高合金在保护性涂层方面表现有前途.
- 高速氧燃料 (HVOF) 喷射是这些合金的关键沉积技术.
研究的目的:
- 为了研究HVOF喷涂期间飞行中氧化对FeNiCoCrMo0.5Al1.3合金涂层相位组成和性能的影响.
- 为了比较HVOF沉积与连续加热和在800°C的异热回火对粉末氧化和相变的作用.
主要方法:
- 气体原子化粉末的表征 (BCC超和固体溶液).
- 用不同的喷射距离喷HVOF.
- 沉积后的热处理 (连续加热和在800°C的同热回火).
- 显微镜 (光学,SEM),X射线衍射 (XRD),能量散射X射线分析 (EDX),热重力测量分析 (TGA),差异热分析 (DTA) 和微硬度测试.
主要成果:
- 喷射HVOF导致BCC超和固体溶液在飞行过程中的氧化和分解,在Al贫乏区域形成FCC阶段.
- 增加喷距离增加了α-Al2O3含量,但没有改善微硬度.
- 在800°C的异热回火促进了BCC固体溶液在显著氧化之前的早期分解,导致微硬度大幅增加到910 HV.
结论:
- 在HVOF喷过程中飞行中的氧化会对FeNiCoCrMoAl涂层的相组成和性能产生负面影响.
- 与研究条件下的HVOF沉积相比,受控回火为加强这些高合金涂层提供了一条优越的途径.
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