Structure of Quasicrystalline material

P. Roupcová^{1, 2}, N. Pizurová¹,

¹Institute of Physics of Materials, Academy of Sciences of Czech Republic v.v.i., Zizkova 22, 616 62 Brno, Czech Republic.

²Central European Institute of Technology, Brno University of Technology, Technicka 10, 616 00 Brno, Czech Republic

roupcova@ipm.cz

Quasicrystals are studied for their possibilities of practical applications. The most interesting are properties such as low friction coefficient, high hardness, wear resistance, and oxidation; and low electrical and thermal conductivity [1]. This efficiency is limited by high brittleness and low deformability at the room temperature. These drawbacks are decreased in applications using quasicrystaline materials like composite or coating material. Quasicrystaline materials based on Al-Cu-Fe are becoming the most researched materials in this field.

This study determined the structure of quasicrystaline powder based on Al-Cr-Fe. The same material will be applied on the coating of Al-alloy surface by means cold plasma spray coating or thermal spraying [2].

The X-ray difraction phase analysis of the powder exhibited the presence of majority of hexagonal Al_49.74Cr_21.41Fe_5.35, and rest of α-Fe and Al₅Fe₂ phases.

References

1. H.S. Jeevan and S. Ranganathan. J. Non-Cryst. Solids, 184 (2004) 334.

2. J. Cizek, K.A. Khor, Surf Coat Tech, 206 (8-9) (2012) 2181.