Ultrasonic compacting of zirconium ceramics from ultradispersed powders

Хасанов, О. Л.; Pokholkov, Y.P.; Sokolov, V. M.; Двилис, Э.С.; Слосман, А. И.; Матренин, С. В.

doi:10.1007/bf00681055

Cited by 7 publications

(4 citation statements)

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“…The powder was pressed by uniaxial dry compacting under various pressures P (250 and 749 MPa), under PUA of different power W from 0.5 up to 2 kW and without PUA [5]. Samples have the form of discs with diameter of 10 and 50 mm and height of 2-3 mm.…”

Section: Methodsmentioning

confidence: 99%

The Deviation Coefficient of Crystalline Nanoceramics Structure from Thermodynamically Equilibrium State

Хасанов

Двилис²

2004

KEM

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By XRD analysis of YSZ nanopowders and ceramics sintered from them it was shown that relative crystallite microstresses vary inversely as sizes of the area of coherent scattering with some coefficient of proportionality k. Physically coefficient k is a value of actual change of the average crystallite size ∆d ACS under microstresses action of crystallite having the certain defective substructure in a material existing in a stable state. The difference between the coefficient k and calculated value of the ∆d ACS reflects a deviation degree of the examined matter structure from thermodynamically equilibrium state, and may be considered as parameter of efficiency of technological processing conditions. The modulus of | k -∆d ACS | was minimal for the structural zirconia ceramics sintered at optimum temperature and having the maximum mechanical characteristics.

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Section: Methodsmentioning

confidence: 99%

The Deviation Coefficient of Crystalline Nanoceramics Structure from Thermodynamically Equilibrium State

Хасанов

Двилис²

2004

KEM

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“…The ultrasonic compaction is the method of choice for manufacturing high-density uniformly structured green bodies mainly from nanosized powders [86][87][88][89][90]. As in the methods described above, ultrasound impact decreases both internal and external pressure.…”

Section: Ultrasonic Compactionmentioning

confidence: 99%

Methods Used for the Compaction and Molding of Ceramic Matrix Composites Reinforced with Carbon Nanotubes

Мешалкин

Belyakov

2020

Processes

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Ceramic matrix composites reinforced with carbon nanotubes are becoming increasingly popular in industry due to their astonishing mechanical properties and taking into account the fact that advanced production technologies make carbon nanotubes increasingly affordable. In the present paper, the most convenient contemporary methods used for the compaction of molding masses composed of either technical ceramics or ceramic matrix composites reinforced with carbon nanotubes are surveyed. This stage that precedes debinding and sintering plays the key role in getting pore-free equal-density ceramics at the scale of mass production. The methods include: compaction in sealed and collector molds, cold isostatic and quasi-isostatic compaction; dynamic compaction methods, such as magnetic pulse, vibration, and ultrasonic compaction; extrusion, stamping, and injection; casting from aqueous and non-aqueous slips; tape and gel casting. Capabilities of mold-free approaches to produce precisely shaped ceramic bodies are also critically analyzed, including green ceramic machining and additive manufacturing technologies.

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“…Формование нанопорошка осуществляли методом холодного статического одноосного прессования в стальных пресс-формах под одновременным воздействием ультразвуковых колебаний [10] при давлениях 50-800 МПа на автоматическом прессе ИП-500 АВТО (ЗИПО, Россия).…”

Section: материалы и методы исследованияunclassified

Manufacturing of Translucent Ysz-Ceramic by Static Uniaxial Pressing at Powerful Ultrasound Assistance With Following Free Sintering

Двилис¹,

Хасанов²,

Paygin³

et al. 2017

ФИ (FR)

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В работе выполнена оптимизация режимов изготовления светопропускающей керамики на основе кубического диоксида циркония (ZrO2), стабилизированного 10 мол. % оксида иттрия (Y2O3) из коммерческих нанопорошков иттрий-стабилизированного диоксида циркония (YSZ) TZ-10YS (TOSOH, Япония). Исследовано влияние давления прессования (от 50 МПа до 800 МПа) и температуры спекания (от 1300 °C до 1650 °C) на плотность и характеристики микроструктуры керамических образцов, полученных методом статического одноосного прессования при комнатной температуре с последующим свободным спеканием в воздушной атмосфере. Методом одноосного прессования под действием мощного ультразвука с последующим спеканием в выбранных режимах получены светопропускающие керамические образцы плотностью до 98 %. Определено влияние ультразвукового воздействия при прессовании на микроструктурные характеристики, упругопластические и оптические свойства спеченных керамических образцов YSZ. Ключевые слова: YSZ, упругопластические свойства, оптические свойства, свободное спекание, ультразвуковое прессованиеThe work aim was optimization of the processing conditions to obtain translucent ceramics based on cubic zirconia (ZrO2) stabilized with 10 % mol yttria (Y2O3) from commercial nanopowders of yttrium-stabilized zirconia TZ-10YS (TOSOH, japan). The samples have been manufactured by the static uniaxial pressing at room temperature with subsequent free sintering in air environment. The effect of the powder compaction pressure (50 -800 MPa) and sintering temperature (1300-1650 °C) on the density and microstructure of the sintered ceramics was investigated. Translucent ceramic samples having density up to 98 % were obtained by the method of static uniaxial pressing at powerful ultrasound assistance (PUA) and with subsequent sintering. The effect of PUA on the microstructure, elastoplastic and optical properties of sintered YSZ ceramic samples was investigated.

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Ultrasonic compacting of zirconium ceramics from ultradispersed powders

Cited by 7 publications

References 0 publications

The Deviation Coefficient of Crystalline Nanoceramics Structure from Thermodynamically Equilibrium State

The Deviation Coefficient of Crystalline Nanoceramics Structure from Thermodynamically Equilibrium State

Methods Used for the Compaction and Molding of Ceramic Matrix Composites Reinforced with Carbon Nanotubes

Manufacturing of Translucent Ysz-Ceramic by Static Uniaxial Pressing at Powerful Ultrasound Assistance With Following Free Sintering

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