Laser clad Ni-base alloy added nano- and micron-size CeO2 composites

Microstructure and wear properties of Al 2 O 3 -CeO 2 /Ni-base alloy composite coatings on aluminum alloys by plasma spray

“…Similar coating microstructure was also reported in some papers [19,20]. As the temperature of plasma arc is higher than the decomposition temperature of CeO 2 (2010 • C) [21], some CeO 2 particles are decomposed to generate atoms Ce. Rare earth elements can easily gather at phase boundary between Al 2 O 3 and Ni-base alloy, which accelerates the dissolution of Al 2 O 3 to reduce the unmelted particles and improve the microstructure of coating S3.…”

Microstructures and properties of TiN reinforced Co-based composite coatings modified with Y2O3 by laser cladding on Ti–6Al–4V alloy

“…However, laser cladding with Co-based alloy and TiN on titanium alloys is rarely reported. Furthermore, the effects of certain rare earth oxides on the microstructure and properties of the cladding coatings have been studied, such as CeO 2 [19], Y 2 O 3 [20] and La 2 O 3 [21]. Though the beneficial effects of the rare earth oxides are notable, the mechanisms need more extensive study.…”

Application Prospects and Microstructural Features in Laser-Induced Rapidly Solidified High-Entropy Alloys

“…It can be seen that the hardness of fcc-structured HEA coatings ranged from 200 to 400 HV, 38 whereas bcc-structured HEA coatings reached 600-1150 HV, [45][46][47][48][49][50] which was higher than the hardness of about 400-800 HV in Ni-and Co-based coatings. 59,60 It should be noted that Qiu et al 47 and Zhang et al 50 respectively reported a hardness of about 1100 HV and 1150 HV in Al 2 CrFeCoCuTiNi 2 and FeCoNiCrCuTiMoAlSiB 0.5 coatings, which was almost four times that of the Q235 iron substrate. This indicated great advantages of HEA coatings over conventional alloy coatings, both in hardness and materials cost.…”

“…However, it is noted that widely used commercial Ni-and Co-based alloy coatings, which always contain many types and high content of precipitates, such as CrNi, Co 7 W 6 , Cr 23 C 6 , and Ni 3 B. 59,60 There is indeed no need to worry about such precipitates possibly ruining the toughness of the coating. Instead, more attention should be paid to the brittleness of the solid-solution phase in HEAs.…”