Intercalated Intermetallic Compounds AlTi<sub>3</sub> and Fe<sub>2</sub>Ti in Microrods and Microtubes Obtained by Invariant Reaction of Mechanically Milled System Al<sub>43</sub>Ti<sub>36</sub>Fe<sub>21</sub>
Lucía G. Díaz Barriga Arceo,
Leonardo González Reyes,
Jesús Noé Rivera Olvera,
Abraham Medina Ovando,
Vicente Garibay Febles
Affiliations
Lucía G. Díaz Barriga Arceo
Depto. Ingeniería en Metalurgia y Materiales UPALM ESIQIE IPN, Apartado Postal 118-018, Del. GAM, Ciudad de México. C.P. 07051, Mexico
Leonardo González Reyes
Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Ciencias Básicas, Av. Sn. Pablo No. 180, Ciudad de México 02200, Mexico
Jesús Noé Rivera Olvera
Tecnológico Nacional de México, Campus Ixtapaluca. TESI, Km. 7 de la carretera Ixtapaluca-Coatepec s/n, Ixtapaluca, Estado de México, C.P. 56580, Mexico
Abraham Medina Ovando
ESIME Azcapotzalco, Instituto Politécnico Nacional. Av. de las Granjas 682, Col. Sta. Catarina, Azcapotzalco 02250, Ciudad de México, Mexico
Vicente Garibay Febles
Programa de Ingeniería Molecular, I.M.P. Lázaro Cárdenas 152, Ciudad de México, C.P. 07730, Mexico
This paper reports the production of intermetallic microrods and microtubes from the decomposition of an intermetallic compound in an AlTiFe system. The intermetallic compound was obtained by mechanosynthesis of elemental powders of Al, Ti and Fe over 300 h at 400 rpm, sintering from compacted powder particles at 300 MPa per minute and at 900 °C for 3600 s in an argon atmosphere. The milled and sintered samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). The intermetallic AlTi3 and Fe3Al phases were obtained during the milling process. After sintering, a decomposition of these intermetallic phases was found—Al3Ti0.75Fe0.25, Al3Ti, FeTi, AlTi3, Ti9Al23, Fe2Ti, Al86Fe14 and Al0.4Fe0.6. As a result of the decomposition, we observed the formation of hexagonal rods with intercalated phases of AlTi3 and Fe2Ti.
