Development of nanoparticle-reinforced alumocomposites for rocket-space engineering

Костиков, В. И.; Агуреев, Л. Е.; Eremeeva, Zh. V.

doi:10.3103/s1067821215030104

Cited by 16 publications

(5 citation statements)

References 1 publication

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“…The formation of these areas is associated with the complexity of the distribution of molybdenum small particles among large particles of the nickel-aluminum matrix during stirring in a ball mill. However, since these areas are distributed throughout the material, they contribute to an increase in mechanical characteristics and prevent crack growth, according to [ 69 , 70 , 71 ]. The presence of chromium is noted both in molybdenum-enriched areas and evenly in the nickel-aluminum matrix, most likely in the form of a solid solution.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Study of Composite Materials of the NiAl-Cr-Mo-Nanoparticles (ZrO2, MgAl2O4) System

Агуреев¹,

Костиков

Савушкина

et al. 2022

Materials

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Materials based on the NiAl-Cr-Mo system with zirconium oxide or aluminum-magnesium spinel nanoparticle small additions were obtained by spark plasma sintering. Thermodynamic modeling was carried out to predict the phase formation in the NiAl-Cr-Mo system and its change depending on temperature, considering the presence of a small amount of carbon in the system. The phase composition and microstructure of materials were studied. NiAl (B2) and CrMo phases were found in the sintered samples. Bending strength measurements at different temperatures shows that nanoparticles of insoluble additives lead to an increase in bending strength, especially at high temperatures. A fractographic analysis of the sample’s fractures shows their hybrid nature and intercrystalline fracture, which is confirmed by the clearly visible matrix grains similar to cleavage. The maximum strength at 700 °C (475 MPa) was found for material with the addition of 0.1 wt.% zirconium oxide nanoparticles. In the study of internal friction, typical peaks of a nickel-aluminum alloy were found in the temperature ranges of 150–200 °C and 350–400 °C.

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Section: Resultsmentioning

confidence: 99%

Preparation and Study of Composite Materials of the NiAl-Cr-Mo-Nanoparticles (ZrO2, MgAl2O4) System

Агуреев¹,

Костиков

Савушкина

et al. 2022

Materials

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“…where σ 0 is a material constant for the friction stress, and k is a positive strengthening coefficient. According to the Hall-Petch relation [45][46][47], the ultimate tensile strength (UTS) of a material is proportional to the reciprocal of the square root of grain size, (Eq. (11)):…”

Section: Tensile Strengthmentioning

confidence: 99%

Enhancement of properties of pure lead via underwater friction stir processing for thermoelectric and battery applications

Sekkappan¹,

Valsaraj²,

Lakshminarayanan³

2020

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In this work, friction stir processing of pure lead metal was performed with various processing parameters and with the varied environment (air and underwater) to investigate the effect of the processing on the microstructure, mechanical and thermal properties. The results showed that the underwater processed samples had a more refined grain structure than those processed in air. The least grain size of 5 µm was seen in the sample processed underwater with a rotational speed of 900 rpm (S09) which was the optimum condition. The optimum condition for samples processed in the air was the 650 rpm rotational speed (S03) which revealed the grain size of 12 µm. The tensile strength of the sample S09 increased by 141.94 % from the base metal value while it increased by 77.33 % for the sample S03. The thermal conductivity of the sample S09 decreased by 59.92 % from the base metal value while it decreased by 39.48 % for the sample S03.

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“…Dispersion strengthening of metals is caused by both coherent and incoherent particles and precipitates. There are many works related to the strengthening of molybdenum [4] and aluminum [5][6][7] by 0.01-0.1 wt.% spherical nanoparticles of refractory oxides. It was shown that the increase in tensile strength could reach 30-300% compared to pure metal.…”

Section: Introductionmentioning

confidence: 99%

Influence of Alumina Nanofibers Sintered by the Spark Plasma Method on Nickel Mechanical Properties

Агуреев

Костиков

Eremeeva

et al. 2021

Metals

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The article presents the study of alumina nanoparticles’ (nanofibers) concentration effect on the strength properties of pure nickel. The samples were obtained by spark plasma sintering of previously mechanically activated metal powders. The dependence of the grain size and the relative density of compacts on the number of nanofibers was investigated. It was found that with an increase in the concentration of nanofibers, the average size of the matrix particles decreased. The effects of the nanoparticle concentration (0.01–0.1 wt.%) on the elastic modulus and tensile strength were determined for materials at 25 °C, 400 °C, and 750 °C. It was shown that with an increase in the concentration of nanofibers, a 10–40% increase in the elastic modulus and ultimate tensile strength occurred. A comparison of the mechanical properties of nickel in a wide range of temperatures, obtained in this work with materials made by various technologies, is carried out. A description of nanofibers’ mechanisms of influence on the structure and mechanical properties of nickel is given. The possible impact of impurity phases on the properties of nickel is estimated. The tendency of changes in the mechanical properties of nickel, depending on the concentration of nanofibers, is shown.

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Development of nanoparticle-reinforced alumocomposites for rocket-space engineering

Cited by 16 publications

References 1 publication

Preparation and Study of Composite Materials of the NiAl-Cr-Mo-Nanoparticles (ZrO2, MgAl2O4) System

Preparation and Study of Composite Materials of the NiAl-Cr-Mo-Nanoparticles (ZrO2, MgAl2O4) System

Enhancement of properties of pure lead via underwater friction stir processing for thermoelectric and battery applications

Influence of Alumina Nanofibers Sintered by the Spark Plasma Method on Nickel Mechanical Properties

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