Morphology and phase modification of HVOF-sprayed MCrAlY-coatings remelted by electron beam irradiation

Microstructure refinement and alloying of WC–CoCr coatings by electron beam treatment

“…The electron beam was oscillated (scanned) with an amplitude of 15 mm. The parameters of the EB-remelting process were optimised in previous research work [18][19][20].…”

Laser melting of HVOF coating: Effect of base material on residual stress formation

“…The laser treatment of the HVOF coating for improved surface sealing was studied by Ahmaniemi et al 1 They showed that laser glazing improved the porosity and hardness in the vicinity of the coating surface. The remelting of the HVOF coating using an electron beam was investigated by Utu et al 2 They indicated that the remelting of the coating changed the morphology on the surface and improved its corrosion resistance. Adhesion testing of thermally sprayed and laser deposited coatings was investigated by Hjornhede and Nylund.…”

Modification of plasma sprayed wear and corrosion resistant coatings by high-density infrared heating

“…Also, remelting techniques can significantly reduce the levels of porosity in these thermal-sprayed coatings. 37 This will be discussed in more detail later in the chapter. Relative costs of various surface treatments are summarized in Figure 6.…”

“…1,2 For instance, thermally sprayed coatings may need to be modified by methods such as laser, flame, and electron beam remelting in order to improve their properties. [29][30][31][32][33][34][35][36][37] However, these methods lack consistency and are limited in size for coating applications desired in certain production settings. Plasma arc lamps can cover an appreciably larger area than other methods and can provide consistent results.…”

“…It is also able to induce a large amount of heat over the area being treated in a short amount of time. 37 This may result in shorter processing times and superior properties.…”