Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7993581 | Journal of Alloys and Compounds | 2018 | 9 Pages |
Abstract
Amorphous Cu50Ti50 alloy was prepared by short-term (20 min) high-energy ball milling (HEBM). According to TEM, electron diffraction, and HAADF STEM results, the material was 93% amorphous with an admixture of nanocrystalline particles 2-8 nm in their size. Thermal stability and crystallization of amorphous Cu50Ti50 was studied by differential scanning calorimetry (DSC) and time-resolved XRD (TRXRD). Depending on heating rate, the crystallization of Cu50Ti50 took place within the temperature range 298-397 °C. The activation energy (199 ± 4 kJ/mol) was found by using the Kissinger equation. Time-resolved diffraction patterns have revealed that the phase transition proceeds without melting within a time period of 20-30 s and the onset of crystallization gets started around 300 °C which is markedly lower than the melting temperature in the Cu-Ti system (982 °C). Based on our TRXRD results, a mechanism of the phase transition under study was suggested.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
N.F. Shkodich, S.G. Vadchenko, A.A. Nepapushev, D. Yu Kovalev, I.D. Kovalev, S. Ruvimov, A.S. Rogachev, A.S. Mukasyan,