A novel approach to accelerate the reaction between Ti and Al

H Wu; G H Fan; X P Cui; L Geng; S H Qin; M Huang

doi:10.1016/j.micron.2013.10.005

A novel approach to accelerate the reaction between Ti and Al

Micron. 2014 Jan:56:49-53. doi: 10.1016/j.micron.2013.10.005. Epub 2013 Oct 19.

Authors

H Wu¹, G H Fan, X P Cui, L Geng, S H Qin, M Huang

Affiliation

¹ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China.

PMID: 24183788
DOI: 10.1016/j.micron.2013.10.005

Abstract

Pure Ti foils and SiCp/Al composite foils were employed to investigate the parabolic growth kinetics of TiAl3 at 660°C. Compared with pure Al foils, the introduction of SiC particles significantly refined TiAl3 grain size by the solid solution of silicon. Corresponding refinement mechanisms were concluded from the perspective of the nucleation of TiAl3. Micromechanics analysis shows that the fine TiAl3 grains own a small viscous resistance, and subsequently an improvement in the reaction rate could be achieved. This meaningful law also applies extensively to Ni/Al and Fe/Al systems.

Keywords: Grain refining; Growth kinetics; Micromechanics; Microstructure; Solid solution; Titanium aluminides.