Research output: Contribution to journal › Article › peer-review
Phase evolution during early stages of mechanical alloying of Cu-13 wt.% Al powder mixtures in a high-energy ball mill. / Dudina, Dina V.; Lomovsky, Oleg I.; Valeev, Konstantin R. et al.
In: Journal of Alloys and Compounds, Vol. 629, 25.04.2015, p. 343-350.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Phase evolution during early stages of mechanical alloying of Cu-13 wt.% Al powder mixtures in a high-energy ball mill
AU - Dudina, Dina V.
AU - Lomovsky, Oleg I.
AU - Valeev, Konstantin R.
AU - Tikhov, Serguey F.
AU - Boldyreva, Natalya N.
AU - Salanov, Aleksey N.
AU - Cherepanova, Svetlana V.
AU - Zaikovskii, Vladimir I.
AU - Andreev, Andrey S.
AU - Lapina, Olga B.
AU - Sadykov, Vladislav A.
PY - 2015/4/25
Y1 - 2015/4/25
N2 - We report the phase and microstructure evolution of the Cu-13 wt.% Al mixture during treatment in a high-energy planetary ball mill with a particular focus on the early stages of mechanical alloying. Several characterization techniques, including X-ray diffraction phase analysis, nuclear magnetic resonance spectroscopy, differential dissolution, thermal analysis, and electron microscopy/elemental analysis, have been combined to study the evolution of the phase composition of the mechanically alloyed powders and describe the microstructure of the multi-phase products of mechanical alloying at different length scales. The following reaction sequence has been confirmed: Cu + Al → CuAl2(+Cu) → Cu9Al4 + (Cu) → Cu(Al). The phase evolution was accompanied by the microstructure changes, the layered structure of the powder agglomerates disappearing with milling time. This scheme is further complicated by the processes of copper oxidation, reduction of copper oxides by metallic aluminum, and by variation of the stoichiometry of Cu(Al) solid solutions with milling time. Substantial amounts of X-ray amorphous phases were detected as well. Differential dissolution technique has revealed that a high content of aluminum in the Cu(Al) solid solution-based powders is due to the presence of Al-rich phases distributed between the Cu(Al) crystallites.
AB - We report the phase and microstructure evolution of the Cu-13 wt.% Al mixture during treatment in a high-energy planetary ball mill with a particular focus on the early stages of mechanical alloying. Several characterization techniques, including X-ray diffraction phase analysis, nuclear magnetic resonance spectroscopy, differential dissolution, thermal analysis, and electron microscopy/elemental analysis, have been combined to study the evolution of the phase composition of the mechanically alloyed powders and describe the microstructure of the multi-phase products of mechanical alloying at different length scales. The following reaction sequence has been confirmed: Cu + Al → CuAl2(+Cu) → Cu9Al4 + (Cu) → Cu(Al). The phase evolution was accompanied by the microstructure changes, the layered structure of the powder agglomerates disappearing with milling time. This scheme is further complicated by the processes of copper oxidation, reduction of copper oxides by metallic aluminum, and by variation of the stoichiometry of Cu(Al) solid solutions with milling time. Substantial amounts of X-ray amorphous phases were detected as well. Differential dissolution technique has revealed that a high content of aluminum in the Cu(Al) solid solution-based powders is due to the presence of Al-rich phases distributed between the Cu(Al) crystallites.
KW - Intermetallides
KW - Mechanical alloying and milling
KW - Microstructure
KW - Spectroscopic methods
UR - http://www.scopus.com/inward/record.url?scp=84921666481&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2014.12.120
DO - 10.1016/j.jallcom.2014.12.120
M3 - Article
AN - SCOPUS:84921666481
VL - 629
SP - 343
EP - 350
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -
ID: 25397264