Table 6: HVOF coatings metallographic examination data.
|
Sample |
|
||||||
|
|
Porosity |
Unmelted particle |
Interface contamination |
Oxides |
Interface Separation |
Cracks |
Rockwell Hardness (HR15 N scale) |
|
Stellite grade 1 |
< 1% |
Absent |
< 0.5% |
< 1% |
No separation |
No Cracks |
90.83 ± 0.75 |
|
Tungsten Carbide |
< 1% |
Absent |
< 0.5% |
< 1% |
No separation |
No Cracks |
93.16 ± 1.17 |
|
Colmonoy 6 |
< 1% |
Absent |
< 0.5% |
< 1% |
No separation |
No Cracks |
89 ± 1.09 |