Evaluation of Cathodic Arc Deposited Thick CrAlSiN Coatings by Erosion Test ()
ABSTRACT
CrAlSiN with thickness up to 16 μm was
deposited on tungsten carbide via multi-deposition process by cathode arc
deposition technique. Scratch and water-sand jet impingement erosion tests were
carried out to evaluate the adhesion by determining the worn surface of the
coatings. Results showed that the failure mode of the adhesion can be concluded
that the weak bond of each CrAlSiN layer as compared to the strong bond between
the coating and substrate. The average surface roughness of the coatings before
the erosion test was about the same level. After the erosion test of 30 minutes,
the eroded CrAlSiN coatings exhibited improved average surface roughness as
compared to the original CrAlSiN coatings. Further increasing the erosion up to
60 minutes, the wear and minor peeling of the CrAlSiN coating between each
layer was observed. A further research to improve the bond strength between
each layer was needed.
Share and Cite:
Ho, W. , Chang, Y. , Chou, B. and Lin, C. (2015) Evaluation of Cathodic Arc Deposited Thick CrAlSiN Coatings by Erosion Test.
Journal of Materials Science and Chemical Engineering,
3, 66-71. doi:
10.4236/msce.2015.31010.