尼科CrAlX (X = Y,Hf和Si) 结合涂层通过冷喷涂用于高温应用
Cristian V Cojocaru1, Maniya Aghasibeig1, Eric Irissou1
1National Research Council of Canada, Boucherville, QC Canada.
Journal of thermal spray technology
|July 31, 2023
概括
激光辅助冷喷涂 (LACS) 为热屏障涂层 (TBC) 提供了一种改进的MCrAlX粘合层沉积方法,克服了传统冷喷涂的局限性,并实现了密集,均的涂层.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 涂料技术 涂料技术
背景情况:
- 在热屏障涂层 (TBC) 中,McrAlX粉末对于高温氧化和热腐蚀耐用的粘合涂层至关重要.
- 传统的热喷涂方法,如VPS,LPPS和HVOF在成本和涂层质量方面都有局限性.
- 冷喷涂是一种有前途的替代品,可以以更低的成本对密集的,无氧化物金属涂层提供更好的解决方案.
研究的目的:
- 使用高压冷喷雾来研究NiCoCrAlY和NiCoCrAlYHfSi粘合层的沉积.
- 为了评估激光辅助冷喷雾 (LACS) 的有效性,以改善NiCoCrAlYHfSi粘合涂层的沉积.
- 为了确定最佳的LACS参数,以实现密集和均的涂层沉积.
主要方法:
- 使用高压冷喷雾来沉积NiCoCrAlY和NiCoCrAlYHfSi粘合涂层.
- 激光辅助冷喷雾 (LACS) 的应用,以增强NiCoCrAlYHfSi粉末的沉积.
- 系统地检查各种激光/喷雾喷射配置以优化LACS.
- 用LACS沉积的粘合层在1150°C下500小时对TBC进行同热氧化测试.
主要成果:
- LACS成功地沉积了NiCoCrAlYHfSi粉末,克服了常规冷喷雾的喷嘴侵蚀和低沉积效率问题.
- 确定了最佳的LACS配置,以实现密集和均的涂层.
- 经过测试后,具有LACS优化的粘合层的TBC表现出富含Al2O3的热生长氧化物保护层,嵌入Hf-Y氧化物.
结论:
- 激光辅助冷喷是一种可行且有利的技术,用于用于TBC应用的先进的MCrAlX粘合涂层.
- 拉斯可以生产高质量,密度和均的粘合层,这对于提高TBC在高温环境中的性能至关重要.
- 开发的LACS工艺为TBC粘合涂层制造提供了传统热喷涂方法的经济有效和高效的替代方案.
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