Novel coalescence-driven grain-growth mechanism during annealing/spark plasma sintering of NiO nanocrystals

Akkiraju, Karthik; Kashyap, Sanjay; Srivastav, Ajeet K.; Chawake, Niraj; Bichler, Lukas; Murty, B.S.

doi:10.1016/j.jeurceramsoc.2017.05.057

Journal of the European Ceramic Society

2017

DOI: 10.1016/j.jeurceramsoc.2017.05.057

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Novel coalescence-driven grain-growth mechanism during annealing/spark plasma sintering of NiO nanocrystals

Karthik Akkiraju

Sanjay Kashyap

Ajeet K. Srivastav

et al.

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Cited by 8 publications

(1 citation statement)

References 40 publications

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“…Spark plasma sintering (SPS) has shown a great promise over the last few decades due to several advantages than the conventional sintering processes, such as densifying variety of materials to fully dense structure at a lower temperature in a short duration of time with a possibility of retaining the fine grain structure [1][2][3]. These benefits are primarily attributed to localized heating mechanism [4,5].…”

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confidence: 99%

Localized pore evolution assisted densification during spark plasma sintering of nanocrystalline W-5wt.%Mo alloy

Srivastav¹,

Chawake²,

Yadav³

et al. 2019

Scripta Materialia

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The present work reports the role of different atomic mobility induced localized pore evolution on densification during spark plasma sintering of nanocrystalline W-Mo alloy powder. The shrinkage (or expansion) behavior of cold compacted milled powders was studied using dilatometry during non-isothermal sintering up to 1600 °C. Subsequently, the milled powders were densified to ~95% relative density using spark plasma sintering up to 1600 °C. The enhanced localized Joule heating due to dynamically evolved porous structure could be attributed for the densification during spark plasma sintering.Spark plasma sintering (SPS) has shown a great promise over the last few decades due to several advantages than the conventional sintering processes, such as densifying variety of materials to fully dense structure at a lower temperature in a short duration of time with a possibility of retaining the fine grain structure [1][2][3]. These benefits are primarily attributed to localized heating mechanism [4,5]. However, localized heating mechanisms are highly dependent on the nature of contact between the particles in due course of sintering process of conductive materials. It has been established that the localized heating and electrosintering mechanisms will be highest and largely contributing at the initial stages of sintering (with more point contacts and higher current) and gradually decreases with time [6,7]. The nature

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mentioning

confidence: 99%

Localized pore evolution assisted densification during spark plasma sintering of nanocrystalline W-5wt.%Mo alloy

Srivastav¹,

Chawake²,

Yadav³

et al. 2019

Scripta Materialia

Self Cite

View full text Add to dashboard Cite

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Microscopic investigation on sintering mechanism of electronic silver paste and its effect on electrical conductivity of sintered electrodes

Yao

Xing

Zhang

et al. 2018

J Mater Sci: Mater Electron

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Study on the oriented self-assembly of cuprous oxide micro-nano cubes and its application as a non-enzymatic glucose sensor

Liu

Zhao

Dai

et al. 2022

Colloids and Surfaces B: Biointerfaces

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Novel coalescence-driven grain-growth mechanism during annealing/spark plasma sintering of NiO nanocrystals

Cited by 8 publications

References 40 publications

Localized pore evolution assisted densification during spark plasma sintering of nanocrystalline W-5wt.%Mo alloy

Localized pore evolution assisted densification during spark plasma sintering of nanocrystalline W-5wt.%Mo alloy

Microscopic investigation on sintering mechanism of electronic silver paste and its effect on electrical conductivity of sintered electrodes

Study on the oriented self-assembly of cuprous oxide micro-nano cubes and its application as a non-enzymatic glucose sensor

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