Effect of SiC particles on crystal growth of Al–Si alloy during laser rapid solidification

Abstract

Rapid solidification microstructures of SiC p /Al-Si composite and the monolithic alloy are comparatively studied through laser remelting process. In the case of composite, particles disturb the orderly arrangement of primary a-Al dendrites observed in the base alloy. The underlying mechanisms are rationalized based on the interaction between the particle and aluminium melt.

Solidification microstructure of plasma sprayed and remelted carbide coatings (Cr3C2/ni-Al, W2C-WC/Co)

“…Rapid crystallization is a process that more and more frequently accompanies the state-of-the-art surface treatment employing high-energy heat sources (such as laser, plasma, or electron beam) (1)(2)(3)(4)(5)(6)(7)(8)(9). Intensive heating of a thin upper layer followed by its equally rapid cooling, causes the structure of the solidifying material to be formed in the specific conditions of a high temperature gradient and a short duration of solidification.…”