Titanium trialuminide coating on L1 0 -type titanium aluminide alloys represents a valuable mean to improve oxidation resistance. Selection of L1 2 -type titanium trialuminide alloys containing Mn as a coating material is particularly attractive because of its good ductility at room temperature and good oxidation resistance at high temperature of 1273 K. However, stability of the coated titanium trialuminide at high temperature and adhesion to the substrate are not established. Two kinds of diffusion couples composed of L1 0 and L1 2 single phase alloys with or without vanadium were applied to diffusion experiments in a temperature range of 1273-1473 K for 2.5-20 h. During the diffusion process, L1 0 and L1 2 phases coexisted without any inter-phase, irrespective of diffusion temperature and vanadium addition. The diffusion couples composed of the alloys without vanadium exhibited cracked region at the interface between the L1 0 and L1 2 phases, while the diffusion couples composed of the alloys with vanadium exhibited no cracked region. The L1 2 -type alloy with vanadium was shown to be an appropriate coating material on the L1 0 alloy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.