Abstracts Book - IMRC 2018

• SA2-P009
MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF
Al5Fe2 INTERMETALLIC NANO-ALLOY
Sarina Alfa Galvez Breña 1 , Carlos Vladimir Landauro Sáenz 1,2 , Francisco Aurelio Rumiche
Zapata 3 , Justiniano Quispe Marcatoma 1,2
1
Universidad Nacional Mayor de San Marcos, Facultad de Ciencias Físicas, Peru. 2 Centro de
Investigaciones Tecnológicas, Biomédicas y Medioambientales, , Peru. 3 Pontificia Universidad
Católica del Perú, CITE Materiales, Peru.
The study of Al-Fe intermetallics with high percentage of aluminum is an
interesting topic of research because they have low density compared to
stainless steel and excellent corrosion resistance for potencial applications.
Among these materials, the Al5Fe2 compound is interesting because it has high
structural stability compared with other intermetallics like Al2Fe or Al13Fe4 [1].
Moreover, these materials have high hardness and low ductibility [2]. The
growing interest in the study of this system is due to its possible applications in
the automotive and aeronautical industry.
In this work, the synthesis of Al5Fe2 was made using the arc furnace technique.
Subsequently, in order to remove possible metastable phases, the samples were
thermally treated in an argon atmosphere at 847°C [3]. Then, the samples were
nanostructured using a high-energy ball mill equipment (SPEX 8000). The
structural characterization of the Al5Fe2 intermetallic was made by means of
the X-ray diffraction technique and the hardness tests in a Durometer with
diamond indenter, where the samples were previously sintered. After 5 hours
of milling, we obtain a stable nano-structure with a grain size of 9 nm and a
hardness improved up to 200% of its solid counterpart. This behavior can be
explained using a grain boundary model.
[1] M. Krasnowski et al.,Intermetallics, 18 (2010) 47–50.
[2] M. Raviathul et al., Materials Science&Engineering A638 (2015) 282–288.
[3] U. Burkhardt et al., Acta Cryst. B50 (1994) 313-316.
Acknowledgment:
S.G.B. thanks to "Círculo de Investigación e Innovación de Materiales Avanzados
para la Industria y Biomedicina” of FONDECYT (CONCYTEC) under Grant #011-
2014-FONDECYT for the financing provided to the present work. C.V.L. and J.Q.M