Structure and Phase Composition of a W-Ta-Mo-Nb-V-Cr-Zr-Ti Alloy Obtained by Ball Milling and Spark Plasma Sintering

Дитенберг, И. А.; Смирнов, И. В.; Korchagin, Michail A.; Grinyaev, K. V.; Мельников, В. В.; Pinzhin, Yuriy P.; Gavrilov, A. I.; Esikov, Maksim A.; Мали, В. И.; Dudina, Dina V.

doi:10.3390/e22020143

Cited by 12 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mechanical activation with subsequent consolidation by spark plasma sintering is currently attractive as a method of producing multicomponent alloys based on refractory metals [1][2][3][4][5][6][7][8][9][10]. Synthesis at lower temperatures is helpful in solving the critical metallurgical problem of conventional technologies: a significant difference in melting temperatures of the constituent components.…”

Section: Introductionmentioning

confidence: 99%

“…One of the urgent tasks of this scientific direction is to reveal how chemical composition and its equiatomicity affect the formation and transformation of the main phases during both mechanical activation of precursors and subsequent spark plasma sintering. By the example of various systems it was shown [4][5][6][7][8][9][10][11][12][13][14][15][16] that intensive dispersion and mixing of the initial components is accompanied by the formation of one or more phases directly during mechanical activation. In many systems of refractory metals, the resulting main phase has a bcc lattice.…”

Section: Introductionmentioning

confidence: 99%

“…In many systems of refractory metals, the resulting main phase has a bcc lattice. Mechanical activation of the nonequiatomic W-Ta-Mo-Nb-Zr-Cr-Ti system causes the formation of two bcc phases, one of which is a precursory state for Laves phases that can be found after spark plasma sintering [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural-Phase State and Microhardness of a Precursor from Equiatomic W-Ta-Mo-Nb-Zr-Cr-Ti Powder Mixture after High-Energy Mechanical Activation

et al. 2021

View full text Add to dashboard Cite

This study explores how the time of high-energy mechanical activation affects the structuralphase state and microhardness of a multicomponent W-Ta-Mo-Nb-Zr-Cr-Ti powder mixture of equiatomic composition. It was found that, in the precursor thus formed, micron-sized particles are fragmented and the degree of consolidation of large agglomerates increases, while the morphology of the agglomerates remains almost unchanged. In addition to the main bcc phase with nearly equiatomic composition W 13-16 Ta 14-17 Mo 11-15 Nb 11-16 Zr 11-15 Cr 13-18 Ti 14-16 , secondary bcc phases based on Ta and W are formed in the precursor. Mixing of these phases during mechanical activation promotes the gradual transition of the precursor to a single-phase state represented by the main bcc phase. These processes in the conditions of high-energy mechanical activation are shown to be activated and enhanced at much shorter times than during lower-energy mechanical activation. It is supposed that the formation of a nearly single-phase state, along with an increasing degree of consolidation of the powder mixture, contributes to an increase in the microhardness of the obtained precursor in contrast to a decrease in the average deviation H V .

show abstract