Physics of the Solid State
Volumes and Issues
Analysis of Al nanocrystals nucleation in Al87Ni8Y5 metallic glass under constant heating rate conditions
Vasiliev S. V. 1,2, Sviridova E. A. 1,2, Tkatch V. I. 1
1Galkin Donetsk Institute for Physics and Engineering, Donetsk, Russia
2Donbass National Academy of Construction and Architecture, Makeyevka, Russia
Email: vasils75@gmail.com, ksvir@list.ru, stalker_1345@mail.ru

PDF
The process of formation of a nanocomposite amorphous-nanocrystalline structure in Al87Ni8Y5 metallic glass under heating with rate of 0.083 K/s was investigated by differential scanning calorimetry, electrical resistance measurements and X-ray diffraction. Taking into account the features of the nanocomposite structure, the model for nucleation rate changes J(T) determination using the experimentally estimated changes of size and volume fraction of nanocrystals was proposed. The dependence of J(T), obtained in this way, was analyzed in the frames of the classical equation of temperature dependence of homogeneous nucleation rate. The numerical values of the parameters in this equation, resulting for the best agreement with the experiment, were determined, and possible reasons of discrepancies were discussed. Keywords: metallic glass, nanocomposite structure, model, size and volume fraction of nanocrystals, classical equation of homogeneous nucleation.
Publisher:

Ioffe Institute

Institute Officers:

Director: Sergei V. Ivanov

Contact us:

26 Polytekhnicheskaya, Saint Petersburg 194021, Russian Federation
Fax: +7 (812) 297 1017
Phone: +7 (812) 297 2245
E-mail: post@mail.ioffe.ru