Emerging continuous SiC fibers for high-temperature applications

Hanns Gietl; Omer Karakoc; Takaaki Koyanagi; Shay Harrison; Yutai Katoh

doi:10.1016/j.ceramint.2024.06.100

Emerging continuous SiC fibers for high-temperature applications

Hanns Gietl
, Omer Karakoc
, Takaaki Koyanagi
, Shay Harrison
, Yutai Katoh

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Silicon carbide (SiC) fibers are responsible for the ultimate strength and toughness of SiC-fiber reinforced composites in harsh environments. The development of a new generation of continuous SiC fibers continues to advance the mechanical properties of composite materials. Tyranno™ SA4 fiber was recently released as a successor of Tyranno™ SA3 fiber. Laser-driven chemical vapor deposition (LCVD) has been adopted as an alternative fiber processing route to synthesizing high-strength SiC fiber with tailorable small diameters and chemical compositions. Both Tyranno™ SA4 and laser-driven CVD fibers show very high tensile strength, about 4 GPa in the as-fabricated condition. The degradation of thermal stability and strength due to annealing in an inert environment were similar for Tyranno™ SA3 and SA4 fibers because of their similar carbon-rich, crystalline microstructure. Silicon-rich fibers produced by LCVD possessed heterogeneous crystallinity, which was attributed to laser power distribution and showed microstructural instability at 1500 °C and above. The new SiC fibers demonstrated an increase in as-fabricated strength but faced the same challenges in environmental resistance as the traditional SiC fibers do.

Original language	English
Pages (from-to)	32893-32904
Number of pages	12
Journal	Ceramics International
Volume	50
Issue number	18
DOIs	https://doi.org/10.1016/j.ceramint.2024.06.100
State	Published - Sep 15 2024

Funding

This manuscript has been authored by UT-Battelle, LLC, under Contract DEAC05- 00OR22725 with the U.S. Department of Energy (DOE). The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).This work was supported by the US Department of Energy, Office of Nuclear Energy and Office of Fusion Energy Sciences, Fusion Materials Program and Early Career Research Program under contact DE-AC05-00OR22725 with UT-Battelle LLC. Access to the Raman spectroscopy system was permitted by Andrew Miskowiec at ORNL. The authors wish to thank José David Arregui-Mena, Benjamin Lamm, and Walter Koncinski at ORNL for reviewing and editing this paper. This work was supported by the US Department of Energy, Office of Nuclear Energy and Office of Fusion Energy Sciences, Fusion Materials Program and Early Career Research Program under contact DE-AC05-00OR22725 with UT-Battelle LLC. Access to the Raman spectroscopy system was permitted by Andrew Miskowiec at ORNL. The authors wish to thank José David Arregui-Mena, Benjamin Lamm, and Walter Koncinski at ORNL for reviewing and editing this paper.

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10.1016/j.ceramint.2024.06.100

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title = "Emerging continuous SiC fibers for high-temperature applications",

abstract = "Silicon carbide (SiC) fibers are responsible for the ultimate strength and toughness of SiC-fiber reinforced composites in harsh environments. The development of a new generation of continuous SiC fibers continues to advance the mechanical properties of composite materials. Tyranno{\texttrademark} SA4 fiber was recently released as a successor of Tyranno{\texttrademark} SA3 fiber. Laser-driven chemical vapor deposition (LCVD) has been adopted as an alternative fiber processing route to synthesizing high-strength SiC fiber with tailorable small diameters and chemical compositions. Both Tyranno{\texttrademark} SA4 and laser-driven CVD fibers show very high tensile strength, about 4 GPa in the as-fabricated condition. The degradation of thermal stability and strength due to annealing in an inert environment were similar for Tyranno{\texttrademark} SA3 and SA4 fibers because of their similar carbon-rich, crystalline microstructure. Silicon-rich fibers produced by LCVD possessed heterogeneous crystallinity, which was attributed to laser power distribution and showed microstructural instability at 1500 °C and above. The new SiC fibers demonstrated an increase in as-fabricated strength but faced the same challenges in environmental resistance as the traditional SiC fibers do.",

author = "Hanns Gietl and Omer Karakoc and Takaaki Koyanagi and Shay Harrison and Yutai Katoh",

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doi = "10.1016/j.ceramint.2024.06.100",

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T1 - Emerging continuous SiC fibers for high-temperature applications

AU - Gietl, Hanns

AU - Karakoc, Omer

AU - Koyanagi, Takaaki

AU - Harrison, Shay

AU - Katoh, Yutai

PY - 2024/9/15

Y1 - 2024/9/15

N2 - Silicon carbide (SiC) fibers are responsible for the ultimate strength and toughness of SiC-fiber reinforced composites in harsh environments. The development of a new generation of continuous SiC fibers continues to advance the mechanical properties of composite materials. Tyranno™ SA4 fiber was recently released as a successor of Tyranno™ SA3 fiber. Laser-driven chemical vapor deposition (LCVD) has been adopted as an alternative fiber processing route to synthesizing high-strength SiC fiber with tailorable small diameters and chemical compositions. Both Tyranno™ SA4 and laser-driven CVD fibers show very high tensile strength, about 4 GPa in the as-fabricated condition. The degradation of thermal stability and strength due to annealing in an inert environment were similar for Tyranno™ SA3 and SA4 fibers because of their similar carbon-rich, crystalline microstructure. Silicon-rich fibers produced by LCVD possessed heterogeneous crystallinity, which was attributed to laser power distribution and showed microstructural instability at 1500 °C and above. The new SiC fibers demonstrated an increase in as-fabricated strength but faced the same challenges in environmental resistance as the traditional SiC fibers do.

AB - Silicon carbide (SiC) fibers are responsible for the ultimate strength and toughness of SiC-fiber reinforced composites in harsh environments. The development of a new generation of continuous SiC fibers continues to advance the mechanical properties of composite materials. Tyranno™ SA4 fiber was recently released as a successor of Tyranno™ SA3 fiber. Laser-driven chemical vapor deposition (LCVD) has been adopted as an alternative fiber processing route to synthesizing high-strength SiC fiber with tailorable small diameters and chemical compositions. Both Tyranno™ SA4 and laser-driven CVD fibers show very high tensile strength, about 4 GPa in the as-fabricated condition. The degradation of thermal stability and strength due to annealing in an inert environment were similar for Tyranno™ SA3 and SA4 fibers because of their similar carbon-rich, crystalline microstructure. Silicon-rich fibers produced by LCVD possessed heterogeneous crystallinity, which was attributed to laser power distribution and showed microstructural instability at 1500 °C and above. The new SiC fibers demonstrated an increase in as-fabricated strength but faced the same challenges in environmental resistance as the traditional SiC fibers do.

UR - https://www.scopus.com/pages/publications/85195846250

U2 - 10.1016/j.ceramint.2024.06.100

DO - 10.1016/j.ceramint.2024.06.100

M3 - Article

AN - SCOPUS:85195846250

SN - 0272-8842

VL - 50

SP - 32893

EP - 32904

JO - Ceramics International

JF - Ceramics International

IS - 18

ER -

Emerging continuous SiC fibers for high-temperature applications

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