Rev.Adv.Mater.Sci. (RAMS)
No 1, Vol. 18, 2008, pages 46-49

IN-FLIGHT CuZrTiNi PARTICLE ENERGY TAILORING IN KINETIC SPRAYING DEPOSITION

Juneseob Kim, Sanghoon Yoon, Hanshin Choi, Hwijun Kim, Hyungho Jo and Changhee Lee

Abstract

Inert gas atomized CuZrTiNi bulk metallic glass powders were sprayed onto mild steel substrates by kinetic spraying with powder carrier gas temperatures of RT, 450 (within the supercooled liquid region), and 550 úC (above the crystallization temperature). The microstructure, porosity, micro hardness, and bond strength of the as-sprayed coatings were characterized as a function of the powder carrier gas temperature. With the increase of powder carrier gas temperature, the crystal phase fraction also increased with grain growth. The brittle nature of the crystal phase and poor contact nature resulted in a lower bond strength of the BMG coating which was produced at the powder carrier gas temperature of 550 úC.

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