Cavitation erosion and jet impingement erosion mechanism of cold sprayed Ni–Al2O3 coating

Erosion wear behaviour of plasma sprayed NiCrSiB/Al2O3 composite coating

“…Coatings show better erosion resistance at 30°impact angle as compared to 90°impact angle due to the pinning effect of blocky Al 2 O 3 particles with higher hardness in the coating. Similar results were observed by M. R. Ramesh et al [16], H. X. Hu et al [28] and Hawthore et al [35].…”

“…H. S. Grewal et al [22] reported an [21] reported a hardness value of 350 for NiCr + 50% Al 2 O 3 cold spray coating. Hu et al [28] reported a maximum hardness of 225 HV 0.2 for the cold sprayed Ni + 40% Al 2 O 3 coating, whereas, Li et al [29] observed a maximum hardness of 173 HV 0.2 also for cold sprayed coatings.…”

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

“…Since the melting point of Al 2 O 3 (2100 • C) is higher than that of Ni-base alloy (1268 • C), the Ni-base alloy powder and small Al 2 O 3 particles can absorb sufficient heat for complete melting, extending and depositing to form lamellar structure in plasma spray process, but some big Al 2 O 3 particles are not fully melted and wrapped in coatings as inclusions. 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.…”

Crack Initiation and Growth Behavior of Cold-Sprayed Ni Particles on IN718 Alloy

“…On the contrary, a disbond in the crack region significantly reduces the stress transfer between the sheet and the coating leading to a pronounced drop in the repairing efficiency. In this case also, the residual stresses at the interfaces start to strongly affect the crack behavior (Ref [29][30][31][32][33]. Figure 14 shows the crack growth rate versus the applied DK for all the produced sheets.…”