Structure and Properties of Dysprosium Titanate Powder Produced by the Mechanochemical Method

Eremeeva, Zh. V.; Панов, В. С.; Myakisheva, L. V.; Lizunov, A. N.; Непапушев, А. А.; Сидоренко, Д. А.; Pavlik, A. V.; Apostolova, E. V.

doi:10.3103/s1067821218030045

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The obtained experimental values of the yield strength σy (or σ0.5), the ultimate strength σu, δ and ψ are written down in the final test table. The young's modulus of metal E is usually not calculated, since for the high-strength pipe steels it is usually located in the narrow range of values from 0.19 to 0.21 TPa (the average value is 0.20 TPa) [1,6,[8][9][10][11][12][13][14][15]. The relative elongation, corresponding to the yield strength σy, is approximately found by the formula εy = σy/E.…”

Section: Fig 1 the Tensile Diagrammentioning

confidence: 99%

On Question of Metals’ Plasticity

Shinkin

2021

DDF

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Straightforward and reverse descriptions are used to describe the metal’s plasticity zone. For the straightforward descriptions of the hardening zone, the “reference” point is the relative deformation εy corresponding to the yield strength σy. The deviation of the relative deformations in the metal hardening zone is measured relative to εy, and the deviation of the normal stresses is measured relative to σy. For the reverse descriptions of the metal hardening zone, the “reference” point is the relative deformation εu corresponding to the ultimate strength σu. The deviation of the relative deformations in the metal hardening zone is measured relative to εu, and the deviation of the normal stresses is measured relative to σu.

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Section: Fig 1 the Tensile Diagrammentioning

confidence: 99%

On Question of Metals’ Plasticity

Shinkin

2021

DDF

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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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Application of Nano-Chromium Oxide for Production of Boron Carbide Ceramics

Eremeeva

Kamali

Лизунов

et al. 2022

KEM

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In this paper, we present the development of new types of boron carbide-based ceramics. Boron carbide is applied in the electronics and nuclear industries as well as for production of the grinding and abrasive materials, protective plates for body armor. The interaction of boron carbide with chromium nano-oxide additives (1-5 wt.%) during sintering was studied by mass spectrometry. It is shown that the formation of chromium nano-boride takes place at the stages of formation of metallic chromium, the lowest chromium boride and chromium carbide. The maximum solubility of chromium in the boron carbide lattice was found to be 0.5 wt.%. A composite material based on boron carbide, В4С with CrB2 nano-inclusions, was prepared. The bending strength and modulus of normal elasticity were equal to 44.6 MPa and 449.5 GPa, respectively. Micro-hardness and residual porosity were determined to be 40 GPa and 5-7 %.

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Structure and Properties of Dysprosium Titanate Powder Produced by the Mechanochemical Method

Abstract: Процессы получения и свойства порошков 11 Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional'nye pokrytiya  1  2017 УДК 621.039.53

Cited by 4 publications

References 7 publications

On Question of Metals’ Plasticity

On Question of Metals’ Plasticity

Enhancing Mechanical Properties of Various Sintered Pellets with Nano-Additives

Application of Nano-Chromium Oxide for Production of Boron Carbide Ceramics

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