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首页> 外文期刊>Journal of Materials Engineering and Performance >Development and High Temperature Property Evaluation of Ni-Co-Cr-Al Composite Electroforms
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Development and High Temperature Property Evaluation of Ni-Co-Cr-Al Composite Electroforms

机译：Ni-Co-Cr-Al复合电铸材料的研制及高温性能评估

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摘要

Ni-Co-Cr-Al composite electroforms were developed with cobalt content of 10 and 40 wt.%. Cr and Al nano-particles were suspended in sulphamate electrolyte and co-deposited in the Ni-Co matrices. The surface morphology was investigated using field emission scanning electron microscope and the composition analyzed by energy-dispersive x-ray analysis. The oxidation resistance of the electroforms was studied from 600 to 1000 degrees C. The weight gain of Ni-10 wt.% Co-Cr-Al was less (better oxidation resistance) compared to Ni-Cr-Al and Ni-40 wt.% Co-Cr-Al. The x-ray diffraction studies revealed that the oxidation product formed on the surface of Ni-Cr-Al and Ni-10 wt.% Co-Cr-Al consisted of NiO and Al2O3, while Ni-40 wt.% Co-Cr-Al comprised oxides such as NiCo2O4, CrO3, CoO, NiO, and Al2O3. The hot corrosion behavior was investigated in 75%Na2SO4 + 25%NaCl environment at 800 degrees C. It was found that the hot corrosion resistance of the composite coating improved with increase in cobalt content. The probable composition suitable for high-temperature applications was found to be Ni-10 wt.% Co-Cr-Al.
机译：开发了钴含量分别为10％和40％（重量）的Ni-Co-Cr-Al复合电铸件。将Cr和Al纳米颗粒悬浮在氨基磺酸盐电解质中，并共沉积在Ni-Co基质中。使用场发射扫描电子显微镜研究表面形态，并通过能量色散X射线分析来分析组成。在600至1000摄氏度下研究了电铸模的抗氧化性。与Ni-Cr-Al和Ni-40 wt。％相比，Ni-10 wt。％Co-Cr-Al的重量增加较小（抗氧化性更好）。 ％Co-Cr-Al。 X射线衍射研究表明，在Ni-Cr-Al和Ni-10 wt。％Co-Cr-Al表面形成的氧化产物由NiO和Al2O3组成，而Ni-40 wt。％Co-Cr-Al Al包含氧化物，例如NiCo 2 O 4，CrO 3，CoO，NiO和Al 2 O 3。研究了在800°C的75％Na2SO4 + 25％NaCl环境中的热腐蚀行为。发现，随着钴含量的增加，复合涂层的抗热腐蚀性能提高。发现适合于高温应用的可能的成分是Ni-10重量％的Co-Cr-Al。

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