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Structure and properties of the nickel aluminide based alloy obtained from a mechanically activated powder mixture by spark plasma sintering
Shevtsova L. I.
1, Esikov M. A.1,2, Malyutina Yu. N.1, Gavrilov A. I.3, Cherkasova N. Yu.1, Malikov V. N.4
1Novosibirsk State Technical University, Novosibirsk, Russia
2Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
4Altai State University, Barnaul, Russia
2Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
4Altai State University, Barnaul, Russia
Email: edeliya2010@mail.ru, esikov@hydro.nsc.ru, romashova@corp.nstu.ru, gavr_sand@mail.ru, cherkasova.2013@corp.nstu.ru, osys@me.com
The paper presents the results of structural studies and evaluation of the strength properties of a domestic Ni3Al-based alloy grade VKNA-4U obtained from initial components by mechanical activation and subsequent spark plasma sintering. The material was sintered in the temperature range of 1100-1200oC. The highest level of bending strength (1800 MPa) was recorded for the VKNA-4U alloy obtained by heating to 1200oC, a compacting pressure of 40 MPa, and a holding time of 5 minutes. The relative density of the material sintered in this mode is ~ 99%. Keywords: spark plasma sintering, mechanical activation, nickel aluminide, VKNA-4U alloy, strength properties.
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