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Article
Thermobaric Sintering of Mechanocomposites of the System Fe-Ga
Author(s)
Tatyana Grigorieva1*, Svetlana Kovaleva2, Vladimir Senyut2, Petr Vityaz2 and Nikolay Lyakhov1
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DOI:10.17265/2161-6221/2015.7-8.003
Affiliation(s)
1. Institute of Solid State Chemistry and Mechanochemistry of SB of RAS, Novosibirsk, 630128, Russia
2. The Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, 220072, Belarus
ABSTRACT
Alloys of the system Fe-Ga obtained by sintering under high pressure and temperature from mechanocomposites formed during MA (Mechanical activation) in different modes were investigated. Structural studies were carried out by means of X-ray diffraction, optical and scanning electron microscopy. It was demonstrated that the sintered materials inherit the phase composition of mechanocomposites. It was established that sintering at high pressure and temperature leads to further decrease in the size of α-Fe crystallites. The presence of the low-melting component in mechanochemically synthesized precursor after MA for a short time promotes the formation of microstructure according to the liquid-phase sintering mechanism. Sintering of mechanocomposites formed from the solid solution based on α-Fe proceeds according to the solid-phase mechanism with homogeneous distribution of components, and microhardness of these materials increases by a factor of 2.
KEYWORDS
Mechanocomposites, mechanical activation, termobaric sintering, microstructure.
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