Programs for X-ray analysis of polycrystals

Шелехов, Е.В.; Свиридова, Т. А.

doi:10.1007/bf02471306

Cited by 317 publications

(121 citation statements)

References 2 publications

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“…The following conceptual approaches can be used to develop the multilayered nano composite coatings for cutting tools namely, (a) the introduction of strengthening solid solutions, (b) the application of graded layers by type of connections, (c) the use of meta-stable compounds with homogeneous metalloid structure, (d) the application of multiphase nano-structured layers, and (e) the use of higher order of multilayer structures with nano-layers [11,23,[25][26].…”

Section: Theoretical Prerequisitementioning

confidence: 99%

Filtered cathodic vacuum Arc deposition of nano-layered composite coatings for machining hard-to-cut materials

Volkhonskii

Vereshchaka

Блинков

et al. 2015

Int J Adv Manuf Technol

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In coated tools, the grain boundaries and coating layers are areas of intense energy dissipation, which hardens the coating material by increasing its toughness and its resistance to the formation and development of cracks. An increase in the efficiency of the coatings was achieved by applying nano-dispersed multilayer composite structure. This paper proposes using nano-scale multilayer composite coating based on TiN-CrN compound to improve thermal stability, where, barrier layers based on ZrNbN have been introduced. The ZrNbN barrier does not interact with TiN and CrN at temperatures around 1000°C. The influence of process parameters of the filtered cathodic vacuum arc deposition on the composition, structure and properties of the coatings based on variation of TiAlN-ZrNbN-CrN was analyzed. The results presented here show that the hardness of the developed coatings was as high as 38 GPa. Subsequently, the carbide tools used in this study with the new coatings had an increased lifetime of 1.5-2.0 times compared to tools with commercial coatings. The coated tools were tested in turning and milling of steels, nickel and titanium alloys.

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Section: Theoretical Prerequisitementioning

confidence: 99%

Filtered cathodic vacuum Arc deposition of nano-layered composite coatings for machining hard-to-cut materials

Volkhonskii

Vereshchaka

Блинков

et al. 2015

Int J Adv Manuf Technol

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“…The size of the coherent scattering regions (CSRs) as well as the Ti and Ag microstrain (ε) values were measured using the Rietveld method [29]. The obtained spectra were processed using a special software package [30]. Table 1 presents the XRD results and Figure 1 provides the diffraction patterns after a certain time of the MA.…”

Section: Research Results and Discussionmentioning

confidence: 99%

Ceramic Materials in a Ti–C–Co–Ca3(PO4)2–Ag–Mg System Obtained by MA SHS for the Deposition of Biomedical Coatings

Potanin

Pogozhev

Новиков

et al. 2017

Metals

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This study aimed to obtain biocompatible ceramic materials in a Ti-C-Co-Ca 3 (PO 4 ) 2 -Ag-Mg system by the combustion mode of mechanically activated (MA) reaction mixtures. The influence of the MA time on the reaction ability capability of the mixtures, on their structural and chemical homogeneity, on the combustion parameters and structural-phase conversions in the combustion wave, as well as on the structure and phase composition of the electrode materials has been researched. It was found that the intense treatment of powder mixtures causes plastic deformation of components, the formation of lamellar composite granules, a reduction in the sizes of coherent scattering regions, and also the formation of minor amounts of products. The influence of the activation duration of the ignition temperature and heat release during the combustion of the reaction mixtures was studied. By the method of quenching the combustion front, it was demonstrated that in a combustion wave, chemical transformations occur within the lamellar structures formed during the process of mechanoactivation. It was shown that in the combustion wave, parallel chemical reactions of Ti with C as well as Ti with Co and Ca 3 (PO 4 ) 2 occur, with a Ti-Co-based melt forming the reaction surface. Ceramic electrodes with different contents of Ag and Mg were synthesized by force self-propagating high-temperature synthesis (SHS)-pressing technology using the MA mixtures. The microstructure of the materials consisted of round-shaped grains of nonstoichiometric titanium carbide TiC x grains, intermetallic matrix (TiCo, TiCo 2 , CoTiP), inclusions of Ca and Mg oxides, and grains of the Ag-based solid solution. An increased content of Ag and Mg in the composition of the electrodes, as well as an increased MA duration, leads to an enlargement of the inclusions of the Ag-containing phase size and deterioration in the uniformity of their distribution.

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“…Рентгеноструктурные исследования НС инва-ра [4] позволили обнаружить появление в результате отжигов ОЦК фазы, количество которой коррелирует с величиной высокотемпературной намагниченности. Дифракционные пики обнаруженной ОЦК фазы близ-ки к линиям сплава с содержанием никеля 20 % [8], ко-личество ОЦК фазы составляет около 10 %. Кроме того, по данным рентгеноструктурного анализа не исключа-ется наличие фаз FeNi и FeNi 3 .…”

Section: связь температурной зависимости намагниченности насыщения с unclassified

Effect of deformation nanostructuring and following annealing on phase composition evolution of invar alloy Fe-36%Ni

Mulyukov¹,

Bitkulov²,

Sharipov³

2014

LoM

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Programs for X-ray analysis of polycrystals

Cited by 317 publications

References 2 publications

Filtered cathodic vacuum Arc deposition of nano-layered composite coatings for machining hard-to-cut materials

Filtered cathodic vacuum Arc deposition of nano-layered composite coatings for machining hard-to-cut materials

Ceramic Materials in a Ti–C–Co–Ca3(PO4)2–Ag–Mg System Obtained by MA SHS for the Deposition of Biomedical Coatings

Effect of deformation nanostructuring and following annealing on phase composition evolution of invar alloy Fe-36%Ni

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