Structural study of an amorphous alloy produced by mechanical alloying using XRD, EXAFS and RMC simulations

✍ Scribed by K.D. Machado; G.A. Maciel; D.F. Sanchez; J.C. de Lima; P. Jóvári

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 344 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.06.027

✦ Synopsis

The structure of an amorphous Cu 64 Ti 36 alloy produced by mechanical alloying was studied by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) spectroscopy techniques and modeled through reverse Monte Carlo simulations using the total structure factor S(K ) and the EXAFS χ (k) oscillations on Cu K edge as input data. From the simulations the partial pair distribution functions g ij (r) and the bond-angle distribution functions ij (cos θ ) were determined and, from these functions, average coordination numbers and average interatomic distances for the first neighbors were calculated. We also obtained information about the three-dimensional structures present in the alloy.