Type: Article

Structural and thermal behavior of Fe-Cr-Mo-P-B-C-Si amorphous and nanocrystalline HVOF coatings

Journal: Journal of Thermal Spray Technology (10599630)Year: 2010/09/01Volume: 19Issue: 5Pages: 1093 - 1099

Movahedi B.^a Enayati M.H.Wong C.C.

a :University of Isfahan - IRAN(IR) - Isfahan

DOI:10.1007/s11666-010-9507-yLanguage: English

Abstract

The microstructure, thermal behavior, and mechanical properties of amorphous/nanocrystalline 70Fe-15Cr-4Mo-5P-4B-1C-1Si (wt.%) coatings produced by high velocity oxy fuel (HVOF) spraying of mechanically alloyed powders were investigated by x-ray diffractometry (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Thermal stability of samples was investigated using differential scanning calorimetry (DSC). The results show that by adjusting the HVOF parameters especially fuel/oxygen ratio and proper selection of powder composition, the desired microstructure with different amount of amorphous and nanocrystalline phases and therefore with different mechanical properties could be obtained. © 2010 ASM International.

Author Keywords

amorphousFe-baseHVOFmechanical alloyingnanocrystallineAmorphous siliconChromate coatingsChromiumDifferential scanning calorimetryFuelsMechanical alloyingMechanical propertiesMetallurgyMicrostructureNanocrystalline powdersScanning electron microscopyThermal sprayingThermodynamic stabilityTransmission electron microscopyX ray diffraction analysis

Other Keywords

Amorphous siliconChromate coatingsChromiumDifferential scanning calorimetryFuelsMechanical alloyingMechanical propertiesMetallurgyMicrostructureNanocrystalline powdersScanning electron microscopyThermal sprayingThermodynamic stabilityTransmission electron microscopyX ray diffraction analysisamorphousFe-15CrFe-baseHigh velocity oxy-fuel sprayingHVOFHVOF coatingsMechanically alloyed powderNanocrystalline phasisNanocrystallinesPowder compositionSEMTEMThermal behaviorsThermal stabilityX-ray diffractometryHVOF thermal spraying