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Title: High-Temperature Creep Properties of SiC Fibers with Different Compositions

Abstract

Silicon carbide (SiC) fiber–reinforced SiC matrix (SiC/SiC) composites have been widely investigated for potential fusion reactor applications. In this present investigation, the high-temperature creep performance of five types of SiC fibers is evaluated and microstructural analysis is performed. The creep behavior of the fibers was assessed by the bend stress relaxation method at various applied strains at 1500°C and 1700°C. The fibers tested include developmental-grade fibers with different residual silicon amounts (~0%, 2% to 3%, and 5% to 6%) fabricated by laser chemical vapor deposition at Free Form Fibers. Generally, the creep behavior of the Free Form (FF) fibers was similar to Hi-Nicalon Type S and/Tyranno-SA SiC fibers currently used for fabrication of SiC/SiC composites for fusion applications. However, all FF fibers exhibited the formation of pores after the creep tests at 1700°C regardless of residual silicon amount, which can be improved by further development via optimization of the composition and microstructure.

Authors:
 [1]; ORCiD logo [2]
  1. University of New Mexico, Albuquerque
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1570135
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 75; Journal Issue: 7; Conference: Embedded Topical 23rd Topical Meeting on the Technology of Fusion Energy (TOFE 2018) - Orland, Florida, United States of America - 11/11/2018 10:00:00 AM-11/15/2018 10:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Patel, Deep, and Koyanagi, Takaaki. High-Temperature Creep Properties of SiC Fibers with Different Compositions. United States: N. p., 2019. Web. doi:10.1080/15361055.2019.1647029.
Patel, Deep, & Koyanagi, Takaaki. High-Temperature Creep Properties of SiC Fibers with Different Compositions. United States. doi:10.1080/15361055.2019.1647029.
Patel, Deep, and Koyanagi, Takaaki. Thu . "High-Temperature Creep Properties of SiC Fibers with Different Compositions". United States. doi:10.1080/15361055.2019.1647029. https://www.osti.gov/servlets/purl/1570135.
@article{osti_1570135,
title = {High-Temperature Creep Properties of SiC Fibers with Different Compositions},
author = {Patel, Deep and Koyanagi, Takaaki},
abstractNote = {Silicon carbide (SiC) fiber–reinforced SiC matrix (SiC/SiC) composites have been widely investigated for potential fusion reactor applications. In this present investigation, the high-temperature creep performance of five types of SiC fibers is evaluated and microstructural analysis is performed. The creep behavior of the fibers was assessed by the bend stress relaxation method at various applied strains at 1500°C and 1700°C. The fibers tested include developmental-grade fibers with different residual silicon amounts (~0%, 2% to 3%, and 5% to 6%) fabricated by laser chemical vapor deposition at Free Form Fibers. Generally, the creep behavior of the Free Form (FF) fibers was similar to Hi-Nicalon Type S and/Tyranno-SA SiC fibers currently used for fabrication of SiC/SiC composites for fusion applications. However, all FF fibers exhibited the formation of pores after the creep tests at 1700°C regardless of residual silicon amount, which can be improved by further development via optimization of the composition and microstructure.},
doi = {10.1080/15361055.2019.1647029},
journal = {},
issn = {1536--1055},
number = 7,
volume = 75,
place = {United States},
year = {2019},
month = {8}
}

Conference:
Other availability
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