Oxidation performance and limitations of additively manufactured SiC/Si─O─C composites at elevated temperatures

Mackenzie J. Ridley; Michael J. Lance; Trevor G. Aguirre; Corson L. Cramer

doi:10.1111/jace.19466

Oxidation performance and limitations of additively manufactured SiC/Si─O─C composites at elevated temperatures

Mackenzie J. Ridley, Michael J. Lance, Trevor G. Aguirre, Corson L. Cramer

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

1 Scopus citations

Abstract

SiC preforms were infiltrated with polycarbosiloxane preceramic polymer to create low-cost SiC—Si_xO_yC_z matrix composites for possible high temperature application. The effect of specimen annealing conditions on the steam and air oxidation resistance was analyzed. Air exposures from 900–1500°C showed stability of the Si_xO_yC_z matrix phase with moderate oxidation resistance. After 900°C exposures, oxidation of the composite is primarily limited to the matrix phase, and only at 1200 and 1500°C was SiC consumption visualized. Steam cycle exposures at 1200°C resulted in rapid linear oxidation of the composites with induced specimen swelling from volume expansion associated with internal oxidation. Specimens annealed in argon were found to be the most oxidation resistant due to increased matrix crystallinity and carbon retention. The results of this work were used to develop clear strategies for improving the high-temperature properties of SiC—Si_xO_yC_z composites.

Original language	English
Pages (from-to)	439-449
Number of pages	11
Journal	Journal of the American Ceramic Society
Volume	107
Issue number	1
DOIs	https://doi.org/10.1111/jace.19466
State	Published - Jan 2024

Funding

The authors would like to thank C. O ’Dell at ORNL for metallographic preparation of specimens and R. Pillai and J. Jun for technical review at ORNL. This work was supported through the Advanced Manufacturing Office within the United States Department of Energy. This manuscript has been authored by UT‐Battelle, LLC under contract number: DE‐AC05‐00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid‐up, irrevocable, world‐wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy 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 ).

Funders	Funder number
U.S. Department of Energy
Advanced Manufacturing Office

Keywords

SiC
additive manufacturing
oxidation
preceramic polymer

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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abstract = "SiC preforms were infiltrated with polycarbosiloxane preceramic polymer to create low-cost SiC—SixOyCz matrix composites for possible high temperature application. The effect of specimen annealing conditions on the steam and air oxidation resistance was analyzed. Air exposures from 900–1500°C showed stability of the SixOyCz matrix phase with moderate oxidation resistance. After 900°C exposures, oxidation of the composite is primarily limited to the matrix phase, and only at 1200 and 1500°C was SiC consumption visualized. Steam cycle exposures at 1200°C resulted in rapid linear oxidation of the composites with induced specimen swelling from volume expansion associated with internal oxidation. Specimens annealed in argon were found to be the most oxidation resistant due to increased matrix crystallinity and carbon retention. The results of this work were used to develop clear strategies for improving the high-temperature properties of SiC—SixOyCz composites.",

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AU - Lance, Michael J.

AU - Aguirre, Trevor G.

AU - Cramer, Corson L.

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AB - SiC preforms were infiltrated with polycarbosiloxane preceramic polymer to create low-cost SiC—SixOyCz matrix composites for possible high temperature application. The effect of specimen annealing conditions on the steam and air oxidation resistance was analyzed. Air exposures from 900–1500°C showed stability of the SixOyCz matrix phase with moderate oxidation resistance. After 900°C exposures, oxidation of the composite is primarily limited to the matrix phase, and only at 1200 and 1500°C was SiC consumption visualized. Steam cycle exposures at 1200°C resulted in rapid linear oxidation of the composites with induced specimen swelling from volume expansion associated with internal oxidation. Specimens annealed in argon were found to be the most oxidation resistant due to increased matrix crystallinity and carbon retention. The results of this work were used to develop clear strategies for improving the high-temperature properties of SiC—SixOyCz composites.

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Oxidation performance and limitations of additively manufactured SiC/Si─O─C composites at elevated temperatures

Abstract

Funding

Keywords

UN SDGs

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