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Title: Flash (Ultra-Rapid) Spark-Plasma Sintering of Silicon Carbide

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep33408· OSTI ID:1438002

A new ultra-rapid process of flash spark plasma sintering is developed. The idea of flash spark plasma sintering (or flash hot pressing - FHP) stems from the conducted theoretical analysis of the role of thermal runaway phenomena for material processing by flash sintering. The major purpose of the present study is to theoretically analyze the thermal runaway nature of flash sintering and to experimentally address the challenge of uncontrollable thermal conditions by the stabilization of the flash sintering process through the application of the external pressure. The effectiveness of the developed FHP technique is demonstrated by the few seconds–long consolidation of SiC powder in an industrial spark plasma sintering device. Specially designed sacrificial dies heat the pre-compacted SiC powder specimens to a critical temperature before applying any voltage to the powder volume and allowing the electrode-punches of the SPS device setup to contact the specimens and pass electric current through them under elevated temperatures. The experimental results demonstrate that flash sintering phenomena can be realized using conventional SPS devices. The usage of hybrid heating SPS devices is pointed out as the mainstream direction for the future studies and utilization of the new flash hot pressing (ultra-rapid spark plasma sintering) technique.

Research Organization:
San Diego State Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0008581
OSTI ID:
1438002
Journal Information:
Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (10)

On thermal runaway and local endothermic/exothermic reactions during flash sintering of ceramic nanoparticles journal January 2018
Realizing a stable high thermoelectric zT ∼ 2 over a broad temperature range in Ge 1−x−y Ga x Sb y Te via band engineering and hybrid flash-SPS processing journal January 2019
Controlling current flow in sintering: A facile method coupling flash with spark plasma sintering journal January 2020
Novel SiC synthesis method applicable to SiC solid phase sintering journal May 2019
Current understanding and future research directions at the onset of the next century of sintering science and technology journal May 2017
Energy efficient spark plasma sintering: Breaking the threshold of large dimension tooling energy consumption journal September 2018
Pressure‐enhanced densification of TaC ceramics during flash spark plasma sintering journal September 2018
Reactive, nonreactive, and flash spark plasma sintering of Al 2 O 3 /SiC composites—A comparative study journal August 2019
Simultaneous Spark Plasma Sintering of Multiple Complex Shapes journal February 2019
All-Materials-Inclusive Flash Spark Plasma Sintering text January 2020

Figures / Tables (9)


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