通过微波束等离子体及其腐蚀机制到化的盐制造共同基层的覆盖层
Kaiqi Sun1, Yufeng Zhang1, Yingfan Wang1
1School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300072, China.
Materials (Basel, Switzerland)
|September 14, 2024
概括
将NiCr-Cr3C2添加到基于的覆盖物中,可以提高高温盐的耐腐蚀性. 最佳的25%重量NiCr-Cr3C2含量改善了机械性能,并形成保护性氧化物,减少了炉和发动机中的钢部件故障.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀工程 腐蚀工程
- 表面工程是什么?表面工程是什么?
背景情况:
- 盐腐蚀 (Na2SO4和NaCl) 是钢件在炉和发动机等高温应用中发生故障的主要原因.
- 开发具有优越耐腐蚀性的先进材料对于延长关键工业元件的寿命和可靠性至关重要.
研究的目的:
- 为了研究不同NiCr-Cr3C2含量在CoNiCrAlY基涂料中对微观结构,机械性能和盐耐腐蚀性的影响.
- 为了确定一个最佳的组合,以增强高温腐蚀保护.
主要方法:
- 使用微光束等离子技术,制备了具有不同NiCr-Cr3C2比率的CoNiCrAlY层.
- 进行了微结构分析,微硬度测试,摩擦系数测量和高温盐腐蚀测试 (在750°C和950°C).
主要成果:
- 使用25%重量的NiCr-Cr3C2 (NC25) 的CoNiCrAlY覆盖层表现出最高的微硬度 (348.2 HV0.3) 和最低的摩擦系数 (0.4751).
- NC25促进了保护性氧化物 (Cr2O3,Al2O3) 和螺旋相 (Ni,Co) Cr2O4) 的形成,显著减少了腐蚀.
- 与750°C相比,950°C的保护作用更为明显.
结论:
- 将25%重量的NiCr-Cr3C2添加到CoNiCrAlY外中,为提高高温融盐的耐腐蚀性提供了一个可行的解决方案.
- 这种优化的外为工业应用提供了增强的机械性能和对腐蚀性环境的优越保护,对于工业应用至关重要.
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