Mechanochemical synthesis and spark plasma sintering of hafnium carbonitride ceramics

Suvorova, Veronika; Непапушев, А. А.; Moskovskikh, Dmitry; Трусов, Г. В.; Kuskov, Kirill; Mukasyan, Alexander S.

doi:10.1016/j.apt.2020.12.018

Cited by 16 publications

(2 citation statements)

References 35 publications

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“…Spark Plasma Sintering (SPS), which belongs to a set called the Field-Assisted Sintering Technique (FAST) [1,2], is used for the synthesis, consolidation and assembly of metals [3][4][5], ceramics [6,7] and composites materials [8][9][10]. This technique allows elaborating fully dense materials while maintaining the fine microstructure or even nanostructure of the starting powders [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electrical Transitions in the First Steps of Spark Plasma Sintering: Effects of Pre-Oxidation and Mechanical Loading within Copper Granular Media

et al. 2022

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Spark Plasma Sintering (SPS) has become a conventional and promising sintering method for powder consolidation. This study aims to well understand the mechanisms of densification encountered during SPS treatments, especially in the early stages of sintering. The direct current (DC) electrical behavior of copper granular medium is characterized. Their properties are correlated with their microstructural evolutions through post-mortem scanning electron microscope (SEM) observations to allow a thorough understanding of the involved Branly effect that is suspected to occur in SPS. The electrical response is studied by modifying the initial thickness of the oxide layer on particles surfaces and applying various mechanical loads on the granular medium. Without load and at low current, the measured quasi-reversible behavior is connected to the formation of spots at the microcontacts between the particles. By increasing the current, the Branly transition from an insulating to a conductive state suddenly occurs. The insulating oxide layer is destroyed, and micro-bridges are created. The application of a mechanical pressure strongly modifies the DC Branly effect. Increasing low stress leads to a strong decrease in the breakdown field. For high-applied pressure, successive drops in the electric field are detected during the electrical transition. These successive drops are induced by microcracking of the insulating oxide layer.

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Section: Introductionmentioning

confidence: 99%

Investigation of Electrical Transitions in the First Steps of Spark Plasma Sintering: Effects of Pre-Oxidation and Mechanical Loading within Copper Granular Media

et al. 2022

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“…After selecting the desired sintering program, either automatically or manually, and starting the apparatus, the electric current passed through the die and powder compact (depending on the electrical conductivity of the sintered material), causing the part to heat up. Various materials were manufactured by SPS including pure metals [10,25], metallic alloys [26][27][28][29], ceramics [30,31], ex situ composite [32,33], in situ composite [34,35], etc. Moreover, SPS is used for the production of highly porous materials or foams [36,37], production of functional gradient materials [38,39], joining and welding of dissimilar materials, and refractory compounds [40,41], and sintering of multi-layer materials in the form of laminates [42,43].…”

Section: Introductionmentioning

confidence: 99%

A critical review on spark plasma sintering of copper and its alloys

et al. 2021

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Copper and its alloys have been in the service of humankind earlier than any other metal throughout history. In the present review, all aspects of the SPS of copper and its alloys are comprehensively investigated, and their potential effects on the microstructure and properties of alloys are thoroughly reviewed. In this regard, the densification phenomenon during SPS treatment is fully investigated. The effects of raw powder characteristics involving particle size, contamination content, and powder morphology on the sinterability of these materials are examined. Then, the influence of SPS operation parameters consisting of pressure, heating rate, dwelling time, pulsed electrical current, electrical pulses pattern, sintering temperature, and sintering tooling on densification of these materials is extensively discussed. Furthermore, the microstructure evolution and grain growth behaviors during SPS are explored. In addition, current challenges and future perspectives of this field are addressed.

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Phase, microstructure evolution, and periodic density functional theory study of reduction and nitridation of V2O3 with clean ammonia gas

Liu

et al. 2022

Advanced Powder Technology

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Mechanochemical synthesis and spark plasma sintering of hafnium carbonitride ceramics

Cited by 16 publications

References 35 publications

Investigation of Electrical Transitions in the First Steps of Spark Plasma Sintering: Effects of Pre-Oxidation and Mechanical Loading within Copper Granular Media

Investigation of Electrical Transitions in the First Steps of Spark Plasma Sintering: Effects of Pre-Oxidation and Mechanical Loading within Copper Granular Media

A critical review on spark plasma sintering of copper and its alloys

Phase, microstructure evolution, and periodic density functional theory study of reduction and nitridation of V2O3 with clean ammonia gas

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