Microstructure and Hardness of Ni-NiO Composites Prepared by Powder Metallurgy.

均, 高木; 泰, 西山; 清司, 坂巻; 憲一, 吉田

doi:10.1299/kikaia.61.1933

Cited by 3 publications

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“…In the literature [40], the properties and effect of Ni-NiO system composites' formation modes were investigated. It was found that the amount of nickel oxide in "natural" film did not affect the mechanical properties of nickel, incl.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…A high dielectric constant was considered due to the electronic and ionic polarizability, and contribution by the oxide contents and Bi ions mainly contributed to the high E' [38,39]. Moreover, existence of the oxygenated groups in the GO caused entrapment of Bi ions and reduced the interaction of Bi with molybdate ions, and hence, more available Bi caused a high E' [40]. E' observed for the LBM/GO composites was higher than that of the undoped nanocomposite, i.e., BM/GO, but overall, the value of the E' was much lower than that of Bi 2 MoO 6 /GO.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Dielectric Studies of Bi2MoO6/Graphene Oxide and La-Doped Bi2MoO6/Graphene Oxide Nanocomposites

Adil

Latif

Waqar

et al. 2021

Metals

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The mixed metal oxides Bi2MoO6 and La-doped Bi2MoO6 were prepared by the sol–gel method. Then, varying quantities of the as-prepared mixed metal oxides were blended with graphene oxide (GO), employing sonication, to obtain Bi2MoO6/GO (BM/GO) and La-Bi2MoO6/GO (LBM/GO) nanocomposites. These prepared materials were characterized by different techniques such as thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and transmission electron microscopy (TEM). Dielectric properties were studied by using a precision impedance analyzer. Dielectric constant and loss tan of the synthesized composites were studied as a function of frequency by using a precision impedance analyzer. Overall, the dielectric constant (ɛ’) observed for the LBM/GO composites was higher than that of BM/GO.

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Laptev

2001

Powder Metallurgy and Metal Ceramics

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Microstructure and Hardness of Ni-NiO Composites Prepared by Powder Metallurgy.

Cited by 3 publications

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

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

Dielectric Studies of Bi2MoO6/Graphene Oxide and La-Doped Bi2MoO6/Graphene Oxide Nanocomposites

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