Fine surface modification of aluminum by laser irradiation with TiO2-Ni composite powder

Masanobu Akanuma; Hiroyuki Tanaka; Takanori Sato; Masayuki Ikeda

doi:10.1117/12.364218

20 September 1999 Fine surface modification of aluminum by laser irradiation with TiO₂-Ni composite powder

Masanobu Akanuma, Hiroyuki Tanaka, Takanori Sato, Masayuki Ikeda

Proceedings Volume 3822, Computer-Controlled Microshaping; (1999) https://doi.org/10.1117/12.364218
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany

Abstract

Surface modification experiments on aluminum were performed using CO₂ laser beam irradiation on a surface on which an alloying powder had been pre-placed. Using TiO₂ particles coated with Ni as a new material for laser alloying, a hard and uniformly-structured alloyed layer was achieved on the Al substrate. The effects of additive Ni on the hardness and structure of the alloyed layer were then investigated. With an increase in Ni content in the alloying powder, the hardness of the alloyed layer increased. This hardening in the alloyed layer was caused by the crystallization of intermetallic compounds. The optimum alloyed layer was obtained, when the weight ratio of TiO₂ to Ni was about 1:1. The thickness of the alloyed layer was 0.6 - 0.7 mm, and the surface roughness about Rz 70 micrometers. It mainly consisted of Al+Al₃Ni eutectic matrix and Al₃Ti dendrites. The micro Vickers hardware of the alloyed layer was Hv200+/- 50. According to the sliding friction test, and specific wear volume was smaller than that of tempered carbon steel under high sliding speed and heavy load conditions.

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Masanobu Akanuma, Hiroyuki Tanaka, Takanori Sato, and Masayuki Ikeda "Fine surface modification of aluminum by laser irradiation with TiO₂-Ni composite powder", Proc. SPIE 3822, Computer-Controlled Microshaping, (20 September 1999); https://doi.org/10.1117/12.364218

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