Parameter Studies on High-Velocity Oxy-Fuel Spraying of CoNiCrAlY Coatings Used in the Aeronautical Industry

Table 3

Results of image analysis based on Co₃₂Ni₂₁Cr₈Al_0.5Y coating of different spray distances.

Property	Spray distance (mm)
	203	229	254	279	305
Interface contamination (%)	44.1	29.8	23.9	43.0	33.8
Oxides (%)	3.9	3.7	2.9	6.8	7
Porosity (%)	2.0	0.3	0.6	4.8	4.5
Unmelted particles	5	4	4	14	8

Average values ​ ​from five image analyses for each case.