Home List of Titles Microstructure and hardness properties of cermet coating sprayed by low power plasma
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/81080
- Microstructure and hardness properties of cermet coating sprayed by low power plasma
- Morks, M. F.; Gao, Y.; Fahim, N. F.; Yingqing, F. U.
- Conventional (micron size) WC–12Co coatings were sprayed on stainless steel substrate with low power plasma spraying process. The plasma torch was designed such that the powder can be sprayed at low power plasma (3.9–9.1 kW) and internally injected by carrier gas in the region between the anode and cathode. The cermet powders were sprayed via this new technique at different plasma power (3.9–9.1 kW). The results show that, at low power (3.9 kW), the main structure of the coatings is composed of WC grains. However, beside WC, W2C phase has been detected in coatings sprayed at high plasma power (5–9 kW). On the other hand, intensity of WC peak decreased and that of W2C increased as the plasma power was increased. The influence of plasma power on the coatings hardness has been investigated. The results indicated that the coatings hardness increased and reached about 1500 HV at plasma power of 6.5 kW. Over this power value, the hardness of the coatings slightly decreased mainly due to the appearance of brittle α-W2C grains.
- Publication type
- Journal article
- Materials Letters, Vol. 60, no. 8 (Apr 2006), pp. 1049-1053
- Publication year
- FOR Code(s)
- 0910 Manufacturing Engineering; 0912 Materials Engineering
- Cermet coatings; Co binder; Hardness; Low power plasma; Microstructures; Plasma spraying; WC-Co
- Elsevier B.V.
- Publisher URL
- Copyright © 2005 Elsevier B.V. All rights reserved.
- Peer reviewed