Oxide ceramics of the new generation and areas of application

Лукин, Е. С.; Makarov, N. A.; Козлов, А. И.; Попова, Н. А.; Ануфриева, Е. В.; Vartanyan, G. A.; Kozlov, I. A.; Safina, M. N.; Lemeshev, D. O.; Gorelik, E. I.

doi:10.1007/s10717-009-9085-y

Cited by 15 publications

(4 citation statements)

References 7 publications

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“…Композит на основе системы Al 2 O 3 -ZrO 2 в настоящее время является распространенным конструкционным и функциональным материалом, поскольку обладает хорошим сочетанием свойств: доступностью и относительно невысокой стоимостью, высокой прочностью, термостойкостью, износостойкостью и химической стойкостью [1][2][3]. Одним из основных технико-экономических факторов, ограничивающих широкое производство изделий из этой керамики, остается высокая температура обжига (1600-1700 °С), необходимая для достижения оптимальной плотности.…”

Section: Introductionunclassified

“…Одним из основных технико-экономических факторов, ограничивающих широкое производство изделий из этой керамики, остается высокая температура обжига (1600-1700 °С), необходимая для достижения оптимальной плотности. Традиционно для снижения температуры спекания керамики используют два принципиально разных способа [1,4]. Один способ -это активизация основного материала, а второй -введение модифицирующих добавок.…”

Section: Introductionunclassified

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Prospects for improving the mechanical properties of an aluminum-zirconium composite by adding ultrafine Al2O3 powder synthesized by nitrate combustion

Pudov,

Komolikov

2023

DREAM

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The paper presents the results of studying the mechanisms of sintering and properties of an Al2O3–ZrO2 composite doped with ultrafine Al2O3 powder (UFP) synthesized by burning nitrates. The material is sintered at temperatures ranging between 1450 and 1550 °C with the analysis of its physical and mechanical properties. It is shown that, as the sintering temperature and Al2O3 UFP concentration increase, linear shrinkage, microhardness, and strength naturally grow (the maximum values at 1550 °С are 27.8%, 19 GPa, and 357 MPa, respectively). The introduction of the Al2O3 UFP into the composite makes it possible to achieve an apparent density of 4.20 g/cm3 even at a sintering temperature of 1550 °С.

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Section: Introductionunclassified

Prospects for improving the mechanical properties of an aluminum-zirconium composite by adding ultrafine Al2O3 powder synthesized by nitrate combustion

Pudov,

Komolikov

2023

DREAM

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“…In the last few years the industry requires materials with increased mechanical strength, wear and thermal shock resistance, physical and chemical stability at high temperature or in corrosion environments [1][2][3][4][5]. In spite of the 90's when the enhancement of hardness and mechanical strength of materials were in the focus of researchers [6,7,8,9] in our days the corrosion [10,11], wear [12][13][14][15], toughness [16,17], dynamic strength [18][19][20][21][22] and thermal shock resistance [23,24,25] are also important.…”

Section: Introductionmentioning

confidence: 99%

Advanced Hetero-Modulus and Hetero-Viscous Complex Materials

Gömze

Gömze²

2012

MSF

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To obtain advance hetero-modulus and hetero-viscous complex materials with extreme high dynamic strength, wear and thermal shock resistances a novel approach was applied by the authors. The developed new hetero-modulus and hetero-viscous composites were reinforced with nanoparticles and submicron fibers and whiskers of Si2ON2, SiAlON, AlN, Si3N4as well as with special additives, which had turned into amorphous phases during sintering. These types of materials have several Youngs modulus and viscosities simultaneously and have high damage tolerance and ability to absorb and dissipate the elastic energy during crack propagation. Understanding the energy engorgement of high speed collision processes, the material structures and rheological properties of such a complex hetero-modulus and hetero-viscous material the authors could mathematically describe the mechanical shear stresses in these complex materials. Analytical methods applied in this research were scanning electron microscopy (SEM), X-ray diffraction, and energy dispersive spectrometry, digital image analysis was applied to microscopy results, to enhance the results of transformations.

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“…A promising material for production of porous structures is alumina characterized by high strength, corrosion resistance, and resistance to attack by aggressive media [1][2][3][4][5]. While alumina-based ceramics offer obvious advantages over other materials, they are brittle, and their porous structure, as a rule, gives rise to a severe reduction in mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Fine crystal structure of porous corundum ceramics

Grigoriev

Кулъков

2011

Russ Phys J

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The microstructure of corundum ceramics based on powders with a varying grain size has been investigated. Both commercial alumina powders and those fabricated by denitration of aluminum salts in a high-frequency discharge plasma were used. An increase in the plasma-chemical Al 2 O 3 powder content in the sample was found to change the pore structure of the corundum ceramics from a high-porosity ceramic skeleton with a well-developed system of channel-forming pores to ceramics with isolated pores. The change in the pore structure was observed for 50% porosity and caused an increase in the level of crystal lattice microdistortions. An increase in the sintering temperature from 1200 to 1650ºC is shown to be responsible for a two-fold increase in the average crystallite size and for annealing of lattice defects along grain boundaries.

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Oxide ceramics of the new generation and areas of application

Cited by 15 publications

References 7 publications

Prospects for improving the mechanical properties of an aluminum-zirconium composite by adding ultrafine Al2O3 powder synthesized by nitrate combustion

Prospects for improving the mechanical properties of an aluminum-zirconium composite by adding ultrafine Al2O3 powder synthesized by nitrate combustion

Advanced Hetero-Modulus and Hetero-Viscous Complex Materials

Fine crystal structure of porous corundum ceramics

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