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.