Mechanochemical Synthesis of Dy2TiO5 Single-Phase Crystalline Nanopowders and Investigation of Their Properties

Eremeeva, J. V.; Vorotilo, S.; Kovalev, D. Yu.; Gofman, A. A.; Lopatin, V. Yu.

doi:10.1134/s2075113318020090

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…Currently, the number of materials science researches in the field of development of the new functional materials and technologies for producing finished products by powder metallurgy methods is rapidly rising [1]. The methods of sintering without loading or pressureless sintering (PS), hot isostatic pressing and mechanochemical synthesis are the most widespread in industry [2][3][4][5][6]. The main problem in production by the traditional technologies is the relatively high porosity of the final products, which significantly affects their strength characteristics.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Mechanical Properties of Various Sintered Pellets with Nano-Additives

Nguyên

Konyukhov

Nguyen³

2021

DDF

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The impact of Fe, Co, Ni nano-additives on the density, microhardness and bending strength was investigated for several sintered pellets. Fe, Co, Ni nanopowders (NP) were prepared in the size range 67-94 nm using chemical metallurgy techniques. These powders (0.5 wt. %) were dispersed into three sets of micron powders: Co (+0.5 wt. % Co NP); Fe (+0.5 wt. % Fe NP); Fe+0.5wt. % C (+0.5 wt. % Co and 0.5 wt. % Ni NP). Mixtures were further mixed and processed using a magnetic mill and a turbulent mixer. Sintering was carried out using spark plasma sintering (SPS) as well as pressureless sintering (PS). The densities of sintered pellets were found to increase by 2.5-3% (SPS) and 3-5% (PS) in the presence of nano-additives; corresponding increases in microhardness and bending strength were determined to be 7.9-11.1% and 17.9-38.7%, respectively. These results are discussed in terms enhanced packing due to interparticle sliding and the filling of free spaces with the nanodisperse phase.

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