Reaction-bond composite synthesis of SiC-TiB₂ by spark plasma sintering/field-assisted sintering technology (SPS/FAST)

Journal Article · Wed Nov 20 00:00:00 EST 2019 · Journal of the European Ceramic Society

DOI:https://doi.org/10.1016/j.jeurceramsoc.2019.11.061· OSTI ID:1607226

Cramer, Corson  ^[1]; Mcmurray, Jake W.  ^[1]; Lance, Michael J.  ^[1]; Lowden, Richard Andrew  ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

High-density SiC-TiB₂ composites were fabricated using the displacement reaction spark plasma sintering/field-assisted sintering technology (SPS/FAST) and SiC, B₄C, TiC, and Si powders. The reaction process was performed in a narrow time frame compared hot pressing. The SiC-TiB₂ composites were sintered with precursor SiC at various pressures to determine the effects of processing with SPS/FAST. The composites completed synthesis during SPS/FAST processing, which occurs more quickly than hot pressing. SEM, STEM, and Raman spectroscopy are used to show the conversion and microstructure. Finally, the composite of 53.6 wt.% SiC and 46.4 wt.% TiB₂ has 99 % theoretical density, hardness of 26.4 GPa, and fracture toughness of 5.12 MPa m^1/2.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1607226
• Alternate ID(s): OSTI ID: 2325362
• Journal Information: Journal of the European Ceramic Society, Vol. 40, Issue 4; ISSN 0955-2219
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ceramic composites
reaction bonding
spark plasma sintering