TAILIEUCHUNG - High-temperature oxidation-resistant NiCr/Al duplex coating on carbon steel substrate

In this study, high temperature oxidation-resistant NiCr/Al duplex coatings on carbon steel substrate have been fabricated by electrical wire arc-spraying process. The oxidation resistance properties of NiCr/Al duplex coating system have been evaluated at 800 °C during retention times of , , and hours. The morphology and chemical composition of their cross-sectional structures were investigated using scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS). Micro-hardness and X-ray diffraction (XRD) measurements on the cross-sectional structure of the NiCr/Al coating were also taken place. After the oxidation test, SEM/EDS data indicated the diffusion of aluminum into the NiCr coating whereas XRD patterns revealed the appearance of new phases (Al3Ni2 and Al2O3). In addition, an increase in micro-hardness (upto 518 - 842 HV) was obtained after oxidation test. These obtained findings indicated that NiCr/Al coating had higher oxidation resistance than NiCr coating. The results suggested that the NiCr/Al duplex coating can be a good candidate for applying to high temperature working parts such as cement plant and waste treatment plant, etc. | High-temperature oxidation-resistant NiCr/Al duplex coating on carbon steel substrate

• Hoá học
• Thermal spray
• NiCr Al duplex coating
• Oxidation resistance
• Carbon steel substrate
• High temperature oxidation resistant
• High temperature working parts
• Thermal spray coatings
• Coated carbon steel
• S N curves
• Type of carbon steels
• Axial and rotating bending fatigue test
• Blood level
• Rat paw oedema
• Spray drying
• Thermal analysis
• Anti inflammatory activity
• Hollow spheres
• Morin transition
• Thermal hysteresis
• The Morin temperature
• Zero field cooling
• Advanced materials and devices