The Kinetic Peculiarities of the Nanocrystallization of Amorphous Alloys Fe84Nb2B14, which are Doped by Rare Earth Metals
Journal Title: Фізика і хімія твердого тіла - Year 2017, Vol 18, Issue 1
Abstract
The thermal stability and crystallization of the Fe82Nb2B14RE2 (RE = Y, Gd, Tb, Dy) amorphous alloys were investigated by differential scanning calorimetric (DSC) method. By X-ray diffraction (XRD) method has been established that the initial AMA have amorphous structure. The RE alloying of Fe82Nb2B14RE2 amorphous alloys increase the nanocrystallization temperatures for ~ 110 K and activation energies of crystallization for ~ 330 kJ/mol. The Avrami constant was found to be 1.86 for Fe84Nb2B14 at 703 K, 1.17 for Fe82Nb2B14Y2 at 813 K, 1.36 for Fe82Nb2B14Gd2 at 808 K, 1.76 for Fe82Nb2B14Tb2 at 808 K and 1.92 for Fe82Nb2B14Dy2 at 808 K. Two-dimensional diffusion controlled growth mechanism with decreasing nucleation rate was observed in the alloys.
Authors and Affiliations
L. Boichyshyn, M. O. Danyliak, B. Kotur, T. Mika
Keywords
Related Articles
- EP ID EP263690
- DOI 10.15330/pcss.18.1.122-128
- Views 68
- Downloads 0
Classical Size Effects in Films of n-PbTe
Based on kinetic Boltzmann equation the boundary problem of calculating the conductivity and Seebeck coefficient for a film with a rectangular cross section is solved. Mirror- diffuse mechanism of reflection of the charg...
Influence of Organic Molecules on the Luminescent Properties of Composites Based on CdS Quantum Dots
The influence of methylene blue (MB) and acridine yellow (AY) dyes on the spectra of luminescence of CdS with quantum dots (QD) dye composites is investigated. It is shown that the luminescence spectrum of the heterosyst...
Laser Illumination Influence on the Optical Characteristics of As40S60-xSex (0 ≤ x ≤ 15) Films
The results of investigation of the As40S60-xSex amorphous films transmission spectra depending on thickness, exposure and heat treatment conditions are given. It was established that the increase of Se content in films...
The Transformation of the Structure at Heating and Mechanism of Thermal Expansion of Sn-Bi Eutectic Alloy
The short range order structures of Sn-Bi eutectic melt has been studied by means of X-ray diffraction and reverse Monte-Carlo methods within 420 – 1120 К temperature range. Temperature dependences of interatomic distanc...
Design and Technological Aspects of SC Structures on Silicon Epitaxial Structures
Investigated parameters and characteristics of CE structures made from silicon epitaxial structures. Presented system: activated boron or phosphorus silicon substrate and epitaxial layer, which coincides with the substra...