Влияние высокого давления на получение мелкодисперсных композитов в системе Cалм. – Ti₄WC₅
Дата
2014
ORCID
DOI
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Назва журналу
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Видавець
НТУ "ХПИ"
Анотація
В данном исследовании в условиях высоких давлений (7,7 ГПа) и температур (1700 – 2100 °С) изучены процессы фазового взаимодействия в квазибинарной системе Cалм. – Ti₄WC₅. Оптимальной температурой формирования прочных связей алмаз-Ti₄WC₅ является 1800 °С. При этой температуре двойной карбид Ti₄WC₅ является стабильным и не распадается согласно данным XRD-анализа. Композит, который показал наиболее высокие физико-механические свойства, содержит около 8 % об. Ti₄WC₅ и может быть рекомендован для использования при камнеобработке.
In this study, the processes of phase interaction in quasi-binary CDiam – Ti₄WC₅ system was studied under high pressure (7.7 GPa) at temperatures (1700 – 2100 С). The optimum temperature of forming of strong bonds of diamond with Ti₄WC₅ is 1800 C. At this temperature binary carbide Ti₄WC₅ is stable and doesn’t decomposed according to data of the XRD-analysis. According to the ultrasound diag-nosis data, the samples of 3.6 g/cm³ density have the following characteristics: Young’s modulus of 902 GPa, the bulk modulus of 340 GPa, Poisson's ratio of 0.082. Microhardness of the composite was HV10 = 51 GPa and KIC = 5.2 MPam1/2. Thermal stability in air was estimated to be about 1100 °C. Thus, it was shown that the binary carbides of refractory metals, in the case of sufficient homogenization of the starting mixture, are promising binders for obtaining of high-strength diamond-containing composites. The ceramic, which shows the highest physical-mechanical properties, comprises about 8 vol. % Ti₄WC₅, and, it can be recommended for use in stone processing.
In this study, the processes of phase interaction in quasi-binary CDiam – Ti₄WC₅ system was studied under high pressure (7.7 GPa) at temperatures (1700 – 2100 С). The optimum temperature of forming of strong bonds of diamond with Ti₄WC₅ is 1800 C. At this temperature binary carbide Ti₄WC₅ is stable and doesn’t decomposed according to data of the XRD-analysis. According to the ultrasound diag-nosis data, the samples of 3.6 g/cm³ density have the following characteristics: Young’s modulus of 902 GPa, the bulk modulus of 340 GPa, Poisson's ratio of 0.082. Microhardness of the composite was HV10 = 51 GPa and KIC = 5.2 MPam1/2. Thermal stability in air was estimated to be about 1100 °C. Thus, it was shown that the binary carbides of refractory metals, in the case of sufficient homogenization of the starting mixture, are promising binders for obtaining of high-strength diamond-containing composites. The ceramic, which shows the highest physical-mechanical properties, comprises about 8 vol. % Ti₄WC₅, and, it can be recommended for use in stone processing.
Опис
Ключові слова
сверхтвёрдая керамика, алмаз, двойные карбиды, жидкофазное спекание, high-pressure, superhard ceramics, diamond, binary carbides
Бібліографічний опис
Влияние высокого давления на получение мелкодисперсных композитов в системе Cалм. – Ti₄WC₅. / Д. А. Стратийчук [и др.] // Вестник Нац. техн. ун-та "ХПИ" : сб. науч. тр. Темат. вып. : Химия, химическая технология и экология. – Харьков : НТУ "ХПИ". – 2014. – № 52 (1094). – С. 138-142.