Synthesis of High-Density Pellets of Uranium Dioxide by Spark Plasma Sintering in Dies of Different Types

Папынов, Е. К.; Shichalin, O.O.; Mironenko, Aleksandr; Ryakov, A. V.; Manakov, I. V.; Makhrov, P. V.; Buravlev, I. Yu.; Тананаев, И. Г.; Авраменко, В. А.; Сергиенко, В. И.

doi:10.1134/s1066362218040045

Cited by 32 publications

(16 citation statements)

References 28 publications

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“…For WC alloys, the SPS method, compared to traditional sintering methods, demonstrates the smallest grain size, the highest hardness, the lowest fracture toughness [ 54 ]. The application of the SPS technology makes it possible to reduce the sintering temperatures by 200 °C, which preserves the WC grain size, uses alternative molds [ 55 ], and provides reactive synthesis [ 56 ]. Considerable experience has been accumulated in using traditional and modern methods of sintering WC-Co nanopowders produced by plasma chemical synthesis [ 57 ].…”

Section: Introductionmentioning

confidence: 99%

“…Hard alloys produced by SPS [ 60 ] and a combination of mechanochemistry and SPS [ 61 ] are being synthesized. SPS has proven to be a perfect method for consolidation of various applications [ 36 , 55 , 62 , 63 , 64 ], porosity reduction for materials where high density is a critical property [ 65 ], including hard alloys and high-temperature materials [ 66 , 67 , 68 ], and coating [ 69 , 70 , 71 ]. The issue of controlling the grain growth of ceramic materials during sintering in various media remains relevant [ 50 , 72 , 73 , 74 ].…”

Section: Introductionmentioning

confidence: 99%

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Spark Plasma Sintering of WC-Based 10wt%Co Hard Alloy: A Study of Sintering Kinetics and Solid-Phase Processes

et al. 2022

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The paper describes the method for producing WC-10wt%Co hard alloy with 99.6% of the theoretical density and a Vickers hardness of ~1400 HV 0.5. Experimental data on densification dynamics, phase composition, morphology, mechanical properties, and grain size distribution of WC-10%wtCo using spark plasma sintering (SPS) within the range of 1000–1200 °C are presented. The high quality of the product is provided by the advanced method of high-speed powder mixture SPS-consolidation at achieving a high degree of densification with minimal calculated grain growth at 1200 °C.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spark Plasma Sintering of WC-Based 10wt%Co Hard Alloy: A Study of Sintering Kinetics and Solid-Phase Processes

et al. 2022

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“…With the development of current-or electric field-assisted sintering techniques, such as spark plasma sintering (SPS) and micro-wave sintering (MWS), it becomes possible to obtain ceramic materials at a faster speed and lower energy consumption [1][2][3]. Since being first reported by Raj et al [4] in 2010, flash sintering (FS) has been broadly applied to sinter many kinds of ceramics, including YSZ [5][6][7], Al 2 O 3 [8,9], BaTiO 3 [10,11], SiC [12], and ZnO [13,14].…”

Section: Introductionmentioning

confidence: 99%

Ethanol-Induced Flash Sintering of ZnO Ceramics at Room Temperature

Yan¹,

Pan²,

Deng³

et al. 2022

Materials

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Ceramic flash sintering with a strong electric field at room temperature is the most attractive method. This paper presents the flash sintering of ZnO ceramics at room temperature by the application of a 3-kV/cm electric field after a dropwise addition of ethanol. This method is simple and easy to control. The density of the specimen exceeded 96% after 30 s of sintering. No significant difference was observed in the initiation voltage of flash sintering with and without the dropwise addition of ethanol. Ethanol burns upon dropwise addition, causing a discharge to first occur far from the location of the dropwise addition, followed by glowing and heating up, which causes the temperature of the entire specimen to rise.

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“…In the present work, the hydrolytic stability of ceramics based on Y 2.5 Nd 0.5 Al 5 O 12 (YAG/Nd) oxide with a garnet structure obtained by the spark plasma sintering (SPS) method at elevated temperatures and pressures was studied. The SPS process is based on high-rate heating of powders in vacuum or in an inert ambient by simultaneously applying a strong millisecond electric DC pulses and a constant pressure to a graphite mold containing the powder [20,[28][29][30][31][32][33][34][35][36][37]. An opportunity to reduce the sintering time drastically (as a compared to conventional sintering process) while preserving a high density of obtained material is an important advantage of SPS process, especially relevant for the radioactive materials.…”

Section: Introductionmentioning

confidence: 99%

Study of the Hydrolytic Stability of Fine-Grained Ceramics Based on Y2.5Nd0.5Al5O12 Oxide with a Garnet Structure under Hydrothermal Conditions

et al. 2021

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The hydrolytic stability of ceramics based on Y2.5Nd0.5Al5O12 oxide with a garnet structure obtained by the spark plasma sintering (SPS) method has been studied. The tests were carried out in distilled water under hydrothermal conditions in an autoclave and, for comparison, in a static mode at room temperature. The mechanism of leaching of Y and Nd from the ceramics was investigated. It has been shown that at “low” temperatures (25 and 100 °C), the destruction of pores occured, and the intensity of the leaching process was limited by the diffusion of ions from the inner part of the sample to the surface. At “high” test temperatures (200 and 300 °C), intense destruction of the ceramic grain boundaries was observed. It was assumed that the accelerated leaching of neodymium is due to the formation of grain-boundary segregations of Nd3+ in sintered ceramics.

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Synthesis of High-Density Pellets of Uranium Dioxide by Spark Plasma Sintering in Dies of Different Types

Cited by 32 publications

References 28 publications

Spark Plasma Sintering of WC-Based 10wt%Co Hard Alloy: A Study of Sintering Kinetics and Solid-Phase Processes

Spark Plasma Sintering of WC-Based 10wt%Co Hard Alloy: A Study of Sintering Kinetics and Solid-Phase Processes

Ethanol-Induced Flash Sintering of ZnO Ceramics at Room Temperature

Study of the Hydrolytic Stability of Fine-Grained Ceramics Based on Y2.5Nd0.5Al5O12 Oxide with a Garnet Structure under Hydrothermal Conditions

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