Processing and microstructure of ZrB2–SiC composite prepared by reactive spark plasma sintering

Trevor G. Aguirre; Corson L. Cramer; Ercan Cakmak; Michael J. Lance; Richard A. Lowden

doi:10.1016/j.rinma.2021.100217

Processing and microstructure of ZrB₂–SiC composite prepared by reactive spark plasma sintering

Trevor G. Aguirre, Corson L. Cramer, Ercan Cakmak, Michael J. Lance, Richard A. Lowden

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

14 Scopus citations

Abstract

In-situ formation of ZrB₂–SiC composites was investigated by reactive spark plasma sintering of precursor powders according to the reaction B₄C + 2ZrC + 3Si → 3SiC + 2ZrB₂. The reaction and process presented here involves a diffusion reaction between B₄C and ZrC which facilitates the formation of ZrB₂, while liquid phase sintering of silicon facilitates atomic diffusion and combines with free C from the B₄C and ZrC reaction to form SiC within minutes of heating and there were some residual unreacted precursor materials. An interpenetrating matrix of ZrB₂–SiC was formed that shows increased fracture toughness (6.03 ± 0.45 MPa m^1/2) despite relatively low density (95 %).

Original language	English
Article number	100217
Journal	Results in Materials
Volume	11
DOIs	https://doi.org/10.1016/j.rinma.2021.100217
State	Published - Sep 2021

Funding

The authors acknowledge Austin Schumacher for assistance with spark plasma sintering work and Tom Geer for metallographic assistance. This work was funded internally by Oak Ridge National Laboratory by LOIS number 8310 : Controlled, Volumetric Combustion Synthesis as an Enabler for the Additive Manufacture of Advanced Engineering Ceramics. This manuscript has been authored by UT-Battelle LLC under Contract No. 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 non-exclusive, 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
Additive Manufacture of Advanced Engineering Ceramics
LOIS	8310
U.S. Department of Energy
Oak Ridge National Laboratory
UT-Battelle	DE-AC05-00OR22725

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title = "Processing and microstructure of ZrB2–SiC composite prepared by reactive spark plasma sintering",

abstract = "In-situ formation of ZrB2–SiC composites was investigated by reactive spark plasma sintering of precursor powders according to the reaction B4C + 2ZrC + 3Si → 3SiC + 2ZrB2. The reaction and process presented here involves a diffusion reaction between B4C and ZrC which facilitates the formation of ZrB2, while liquid phase sintering of silicon facilitates atomic diffusion and combines with free C from the B4C and ZrC reaction to form SiC within minutes of heating and there were some residual unreacted precursor materials. An interpenetrating matrix of ZrB2–SiC was formed that shows increased fracture toughness (6.03 ± 0.45 MPa m1/2) despite relatively low density (95 %).",

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AU - Aguirre, Trevor G.

AU - Cramer, Corson L.

AU - Cakmak, Ercan

AU - Lance, Michael J.

AU - Lowden, Richard A.

PY - 2021/9

Y1 - 2021/9

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AB - In-situ formation of ZrB2–SiC composites was investigated by reactive spark plasma sintering of precursor powders according to the reaction B4C + 2ZrC + 3Si → 3SiC + 2ZrB2. The reaction and process presented here involves a diffusion reaction between B4C and ZrC which facilitates the formation of ZrB2, while liquid phase sintering of silicon facilitates atomic diffusion and combines with free C from the B4C and ZrC reaction to form SiC within minutes of heating and there were some residual unreacted precursor materials. An interpenetrating matrix of ZrB2–SiC was formed that shows increased fracture toughness (6.03 ± 0.45 MPa m1/2) despite relatively low density (95 %).

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Processing and microstructure of ZrB₂–SiC composite prepared by reactive spark plasma sintering

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