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

Abstract

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.

Authors:
 [1];  [1];  [1]
  1. San Diego State Univ., San Diego, CA (United States)
Publication Date:
Research Org.:
San Diego State Univ., San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1438002
Grant/Contract Number:  
SC0008581
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Olevsky, Eugene A., Rolfing, Stephen M., and Maximenko, Andrey L. Flash (Ultra-Rapid) Spark-Plasma Sintering of Silicon Carbide. United States: N. p., 2016. Web. doi:10.1038/srep33408.
Olevsky, Eugene A., Rolfing, Stephen M., & Maximenko, Andrey L. Flash (Ultra-Rapid) Spark-Plasma Sintering of Silicon Carbide. United States. doi:10.1038/srep33408.
Olevsky, Eugene A., Rolfing, Stephen M., and Maximenko, Andrey L. Wed . "Flash (Ultra-Rapid) Spark-Plasma Sintering of Silicon Carbide". United States. doi:10.1038/srep33408. https://www.osti.gov/servlets/purl/1438002.
@article{osti_1438002,
title = {Flash (Ultra-Rapid) Spark-Plasma Sintering of Silicon Carbide},
author = {Olevsky, Eugene A. and Rolfing, Stephen M. and Maximenko, Andrey L.},
abstractNote = {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.},
doi = {10.1038/srep33408},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {2016},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 14 works
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Figures / Tables:

Figure 1 Figure 1: Shown above is the FHP die system. These dies allow the specimen to be isolated from electrical current while being heated through radiation heating. At critical temperature, the copper tube collapses and the specimen is exposed to the current of the SPS device.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.