Synthesis and characterization of amorphous Al80Fe10 Ti5Nb3B2 by mechanical alloying

In this stu.dy the formation mechanism of the amorphous phase and crystall ine phases in thealuminum based amorphous alloy, Al80Fe10Ti5Nb3B2 has been studied. Using the mechanical alloyingtechnique on this alloy system, powder mixtures containing AI, Fe, Ti, Nb, and 8 were mixed to the desiredweight ratio. To evaluate the amorphization, X-ray diffraction (XRD) was ca1Tied out and thermal analysiswas pe1formed for the phase formation mechanism study. The results. reveal that after mechanical aUoyingof the considered alloy system for 30 hours, it was determined that the amorphous alloy developed inaddition to the crystalline phase of AI3Nb. During the milling of the powder crystalline phase of AI2T i wasformed and then dissolved after some more milling of the powder mixture. A DT A test carried out to studythe thermal stability of the obtained amorphous phase. After heat treatment of the mechanically a lloyedsample for 30 hours, the crystallized phases were Fe3B, Ab Ti, AI13Fe4 and AI3Nb which existed before theheating.

کلیدواژه ها:

Aluminum based amorphous alloy ، Mechanical Alloying ، crystalline phase ، non-isothermal crystallization ،