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Title: Structure and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites

Abstract

Abstract The incorporation of SiOC polymer‐derived ceramics into porous carbon materials could provide tailored shapeable, mechanical, electrical, and oxidation‐resistant properties for high‐temperature applications. Understanding the thermodynamic and kinetic stability of such materials is crucial for their practical application. We report here the dependence of structures and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites ( CBCFs ) on the pyrolysis temperature using spectroscopic methods and high‐temperature oxide melt solution calorimetry. The results indicate that a SiOC ceramic pyrolyzed at 1200°C and 1600°C is energetically stable with respect to an isocompositional mixture of cristobalite, silicon carbide, and graphite by 4.9 and 10.3 kJ/mol, respectively, and more energetically stable than that pyrolyzed at 1450°C. Their thermodynamic stability is related to their structural evolution. SiOC ‐modified CBCF s become energetically less stable with increasing preparation temperature and concomitant increase in excess carbon content.

Authors:
 [1];  [2];  [3];  [2];  [3];  [3]
  1. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an China, Peter A. Rock Thermochemistry Laboratory and NEAT ORU University of California Davis Davis California
  2. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an China
  3. Peter A. Rock Thermochemistry Laboratory and NEAT ORU University of California Davis Davis California
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1373825
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Name: Journal of the American Ceramic Society Journal Volume: 100 Journal Issue: 8; Journal ID: ISSN 0002-7820
Publisher:
Wiley-Blackwell
Country of Publication:
United States
Language:
English

Citation Formats

Niu, Min, Wang, Hongjie, Chen, Jiewei, Su, Lei, Wu, Di, and Navrotsky, Alexandra. Structure and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites. United States: N. p., 2017. Web. doi:10.1111/jace.14830.
Niu, Min, Wang, Hongjie, Chen, Jiewei, Su, Lei, Wu, Di, & Navrotsky, Alexandra. Structure and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites. United States. https://doi.org/10.1111/jace.14830
Niu, Min, Wang, Hongjie, Chen, Jiewei, Su, Lei, Wu, Di, and Navrotsky, Alexandra. Fri . "Structure and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites". United States. https://doi.org/10.1111/jace.14830.
@article{osti_1373825,
title = {Structure and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites},
author = {Niu, Min and Wang, Hongjie and Chen, Jiewei and Su, Lei and Wu, Di and Navrotsky, Alexandra},
abstractNote = {Abstract The incorporation of SiOC polymer‐derived ceramics into porous carbon materials could provide tailored shapeable, mechanical, electrical, and oxidation‐resistant properties for high‐temperature applications. Understanding the thermodynamic and kinetic stability of such materials is crucial for their practical application. We report here the dependence of structures and energetics of SiOC and SiOC ‐modified carbon‐bonded carbon fiber composites ( CBCFs ) on the pyrolysis temperature using spectroscopic methods and high‐temperature oxide melt solution calorimetry. The results indicate that a SiOC ceramic pyrolyzed at 1200°C and 1600°C is energetically stable with respect to an isocompositional mixture of cristobalite, silicon carbide, and graphite by 4.9 and 10.3 kJ/mol, respectively, and more energetically stable than that pyrolyzed at 1450°C. Their thermodynamic stability is related to their structural evolution. SiOC ‐modified CBCF s become energetically less stable with increasing preparation temperature and concomitant increase in excess carbon content.},
doi = {10.1111/jace.14830},
journal = {Journal of the American Ceramic Society},
number = 8,
volume = 100,
place = {United States},
year = {Fri Apr 21 00:00:00 EDT 2017},
month = {Fri Apr 21 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1111/jace.14830

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Cited by: 24 works
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