The features of combustion and structure formation of ceramic materials in the TiC–Ti3PO –CaO system

Potanin, A. Yu.; Левашов, Е. А.; Pogozhev, Yu. S.; Shvindina, N.V.; Kovalev, D. Yu.

doi:10.1016/j.ceramint.2015.03.036

Cited by 17 publications

(22 citation statements)

References 17 publications

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“…During detailed research of the post-combustion zone (Figure 5e), small circular grains of titanium carbide TiC x (size up to 1 µm) have been noted. This phase forms through the known mechanism of reaction diffusion after the formation of a titanium melt and the dissolution of carbon in it [25,34]. Apart from this, one can observe the products of the interaction of titanium and cobalt with tricalcium phosphate: calcium oxide, CaO, as well as CoTiP phosphate phase, distributed over the titanium carbide grain boundaries.…”

Section: Research Results and Discussionmentioning

confidence: 96%

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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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Section: Research Results and Discussionmentioning

confidence: 96%

“…This is explained by an increased content of titanium and carbon in the reaction charge mixture, and, consequently, a larger contribution of the exothermic reaction to titanium carbide formation [34].…”

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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“…The electrode materials were obtained by means of the forced SHSpressing technology [23]. Ti powders with an average particle size of 45 μm, carbon black (20-50 nm), and tricalcium phosphate Са 3 (РО 4 ) 2 (TCP) annealed at 800°C were used as the initial reagents.…”

Section: Shs Electrodesmentioning

confidence: 99%

Structural transformations in TiC-CaO-Ti3PO(x)-(Ag2Ca) electrodes and biocompatible TiCaPCO(N)-(Ag) coatings during pulsed electrospark deposition

Sheveyko

Manakova

Zamulaeva

et al. 2016

Surface and Coatings Technology

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“…Для сравнения эрозионной способности по технологии СВС были изготовлены электрод-ные материалы состава TiC 0,5 -Ti 3 PO x -CaO из реакционной смеси (Ti + 0,5C) + 10 % Ca 3 (PO 4 ) 2 по аналогии с [20]. Синтез спрессованного до относительной плотности 55-60 % шихтового брикета диаметром 48 мм проводили в песчаной реакционной пресс-форме на гидравлическом прессе ДА-1532Б.…”

Section: методика исследованийunclassified

“…В работе [20] описаны методика получения путем самораспространяющегося высокотемпе-ратурного синтеза (СВС), структура и свойства керамических электродных материалов в системе TiC 0,5 -Ti 3 PO x -CaO, предназначенных для на-несения биоактивных покрытий. В то же время представляет интерес создание композиционно-го (металлокерамического) электрода с титановой матрицей, в которую импрегнированы фазы фос-фата или фосфида титана и оксида кальция, обес-печивающие биоактивность материала.…”

Section: Introductionunclassified

Peculiarities of formation of sintered electrodes of the Ti–Ti3P–CaO composition and their application in technology of pulsed electric-discharge machining of titanium

Логинов¹,

Левашов²,

Потанин³

et al. 2015

Izv. VUZ. Poroshk. Met.

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Исследовано влияние механической обработки на структуру и фазовый состав порошковых смесей Ti-10%Ca 3 (PO 4 ) 2 . По тех-нологии прессования и вакуумного спекания получены керамические электродные материалы Ti-Ti 3 P-CaO с высокой одно-родностью компонентов и остаточной пористостью 5-7 %. Изучена эрозионная способность спеченного металлокерами-ческого электрода Ti-Ti 3 P-CaO при импульсной электроискровой обработке титановых подложек и проведено сравнение с электродами TiC 0,5 -Ti 3 PO x -CaO, изготовленными методом самораспространяющегося высокотемпературного синтеза. По-крытия, полученные при использовании электродов Ti-Ti 3 P-CaO и TiC 0,5 -Ti 3 PO x -CaO, характеризовались высокой сплошнос-тью, толщиной до 20 мкм, микротвердостью до 3,6 ГПа, шероховатостью 3,3-4,6 мкм, наличием и равномерным распределе-нием биоактивных элементов кальция и фосфора. 2015. No. 4. С. 45-58. DOI: dx.doi.org/10.17073/1997-308X-2015 Peculiarities of formation of sintered electrodes of the Ti-Ti 3 P-CaO composition and their application in technology of pulsed electric-discharge machining of titaniumThe influence of mechanical treatment on the structure and phase composition of Ti-10%Ca 3 (PO 4 ) 2 powder mixtures is investigated. The Ti-Ti 3 P-CaO ceramic electrode materials with a high uniformity of components and residual porosity of 5-7% are fabricated according to the pressing and vacuum sintering technology. The erosion ability of the Ti-Ti 3 P-CaO metal-ceramic electrode under the pulsed electric-discharge machining of titanium substrates is investigated and compared with the TiC 0,5 -Ti 3 PO x -CaO electrodes fabricated by self-propagating high-temperature synthesis. Coatings fabricated when using Ti-Ti 3 P-CaO and TiC 0,5 -Ti 3 PO x -CaO electrodes are characterized by high continuity, thickness up to 20 μm, microhardness up to 3,6 GPa, roughness to 3,3-4,6 μm, and the presence and uniform distribution of calcium and phosphorus bioactive elements.Keywords: pulsed electric-discharge machining, planetary ball mill, sintering, bioactive coating, ceramics.

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The features of combustion and structure formation of ceramic materials in the TiC–Ti3PO –CaO system

Cited by 17 publications

References 17 publications

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

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

Structural transformations in TiC-CaO-Ti3PO(x)-(Ag2Ca) electrodes and biocompatible TiCaPCO(N)-(Ag) coatings during pulsed electrospark deposition

Peculiarities of formation of sintered electrodes of the Ti–Ti3P–CaO composition and their application in technology of pulsed electric-discharge machining of titanium

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