Microstructure and Properties of Laser Fused Nickel Based Self Fluxing Alloy Coating
The thermal sprayed coatings are widely used in waste incineration boilers and fossil fuel-fired boilers. However, the defects, such as porosity, cracks and unmelted particles, in these coatings are detrimental to corrosion performance. In this study, the nickel based self fluxing alloy coating was fused by YAG laser to improve performance of the coating. Under appropriate laser parameters, the nonporous, crack-free coating was produced. The rubber wheel type abrasion wear test and hot corrosion test conducted in the presence of a mixed salt of Na2SO4/NaCl/KCl at 650°C showed that the modified coating exhibited excellent wear and corrosion resistances compared with the as sprayed and gas fused coatings.
T. Chandra, K. Tsuzaki, M. Militzer and C. Ravindran
Y. Li et al., "Microstructure and Properties of Laser Fused Nickel Based Self Fluxing Alloy Coating", Advanced Materials Research, Vols. 15-17, pp. 135-140, 2007