Structure and phase composition of materials fabricated by direct laser deposition using Al-TiB2 composite powder

Abstract

The paper studies the structure and phase composition of materials fabricated by direct laser deposition using Al-TiB₂ composite powder obtained by self-propagating high-temperature synthesis (SHS). The fabricated specimens inherit the structure of the SHS-produced powder and consist of the aluminum matrix and TiB₂ ceramic particles. The powder consumption ranging from 5.1 to 7.5 g/min, leads to a change in the size of the coherent scattering region of Al and TiB₂ phases, and the average size of ceramic particles in the material structure. It is shown that consuming 5 g/min of the powder, the high dense microstructure can be obtained with the lowest number of isolated pores.