Original Article |
2006, Vol.28, No.2, pp. 441-448
Aluminium-12wt% silicon coating prepared by thermal spraying technique: Part 2 microstructure and properties
Apakorn Yudee, Apichat Sopadang, Sittichai Wirojanupatump, and Sukanda Jiansirisomboon
pp. 441 - 448
Abstract
At present, thermal spray technology has been widely used as an alternative method for wear protection in materials by applying coated layer on an original worn surface. This research studied the thermal sprayed Al-12wt%Si coating prepared by flame spray technique. This material has been known as a candidate for wear resistance in particularly an automobile industry. In this research, the most suitable spraying condition had been achieved by a design of experiment which was 38 ft3/hr (1.026 m3/hr) of oxygen flow rate, 27 ft3/hr (0.729 m3 /hr) of acetylene flow rate and 58 mm of spray distance. The as-sprayed coating had a hardness of 87.0±8.3 HV, thickness of 236.7±20.5 µm, percentage volume fraction of porosity of 14.99±1.63 and wear rate of 1.108x10-3 ± 0.001 mm3/m. Microstructure of the coating was also investigated.
