Wear Resistance of AlN-Al Cermet Coatings Deposited by the HVOF Spray Process
MATSUMOTO Taihei, CUI Lin, NOGI Kiyoshi
Transactions of JWRI
Abstract
AlN-Al cermet coatings were deposited by the HVOF spray process and the effect of the powder morphology on the wear resistance of the deposited coatings was investigated. Three types of agglomerated powders with AlN particle diameters of 1.8 m, 6.7 m and 13.3 m were sprayed and the Al amount in the powder was changed from 10-40 mass%. The wear resistance of the coatings was investigated using a ball-on-disc sliding tester with a SUS440 or SiC counter ball. The wear resistance of the coating is better for larger amounts of the aluminum binder phase. The larger aluminum amount is obtained when the AlN particles in the agglomerated powder are larger. The wear resistance of the coating using the 13.3 m AlN particles is equivalent to that of a sintered AlN disk.
Key words: AlN-Al Cermet; HVOF Spray; Powder Morphology; Wear Resistance
|
