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Research Article
Microstructure and mechanical properties of 3D Cf/SiBCN composites fabricated by polymer infiltration and pyrolysis
De-Wei Ni
Shanghai Institute of Ceramics Chinese Academy of Sciences
Corresponding Author
ORCiD: https://orcid.org/0000-0002-6206-1613
License:
This work is licensed under a CC BY 4.0 License. Read Full License
In this work, 3D C f /SiBCN composites were fabricated by polymer infiltration and pyrolysis (PIP) with poly(methylvinyl)borosilazane as SiBCN precursor. The 3D microstructure evolution process of the composites was investigated by an advanced x-ray computed tomography (XCT). The effect of dicumyl peroxide (DCP) initiator addition on the crosslinking process, microstructure evolution and mechanical properties of the composites were uncovered. With the addition of DCP initiator, the liquid precursor can cross-link to solid-state at 120 °C. Moreover, DCP addition decreases the release of small molecule gas during pyrolysis, leading to an improved ceramic yield 4.67 times higher than that without DCP addition. After 7 PIP cycles, density and open porosity of the final Cf/SiBCN composite with DCP addition are 1.73 g·cm -3 and ~10%, respectively, which are 143.0% higher and 30.3% lower compared with the composites without DCP addition. As a result, the flexural strength and elastic modulus of Cf/SiBCN composites with DCP addition (371 MPa and 31 GPa) are 1.74 and 1.60 times higher than that without DCP addition (213 MPa and 19.4 GPa).
Keywords
Cf/SiBCN, Ceramic matrix composites, DCP, X-ray computed tomography (XCT)
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CURRENT STATUS: Under Review
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Posted 11 Aug, 2020
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Reviewers invited
Invitations sent on 13 Aug, 2020
Reviewer #1 agreed
On 13 Aug, 2020
Review #1 received
Received 13 Aug, 2020
Editor assigned
On 06 Aug, 2020
Submission checks complete
On 05 Aug, 2020
Editor invited
On 05 Aug, 2020
No comments provided
Review #3 received
Received 30 Jun, 2020
Editorial decision: Major revisions
On 30 Jun, 2020
Review #2 received
Received 17 Jun, 2020
Review #1 received
Received 16 Jun, 2020
Reviewer #3 agreed
On 08 Jun, 2020
Reviewer #2 agreed
On 05 Jun, 2020
Reviewers invited
Invitations sent on 04 Jun, 2020
Reviewer #1 agreed
On 04 Jun, 2020
Editor assigned
On 30 May, 2020
First submitted
On 29 May, 2020
Submission checks complete
On 29 May, 2020
Editor invited
On 29 May, 2020
Metrics
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Subject Areas
Ceramics
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This preprint is under consideration at Journal of Advanced Ceramics. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Microstructure and mechanical properties of 3D Cf/SiBCN composites fabricated by polymer infiltration and pyrolysis
De-Wei Ni
Shanghai Institute of Ceramics Chinese Academy of Sciences
Corresponding Author
ORCiD: https://orcid.org/0000-0002-6206-1613
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 2
Posted 11 Aug, 2020
No community comments so far
Reviewers invited
Invitations sent on 13 Aug, 2020
Reviewer #1 agreed
On 13 Aug, 2020
Review #1 received
Received 13 Aug, 2020
Editor assigned
On 06 Aug, 2020
Submission checks complete
On 05 Aug, 2020
Editor invited
On 05 Aug, 2020
No comments provided
Review #3 received
Received 30 Jun, 2020
Editorial decision: Major revisions
On 30 Jun, 2020
Review #2 received
Received 17 Jun, 2020
Review #1 received
Received 16 Jun, 2020
Reviewer #3 agreed
On 08 Jun, 2020
Reviewer #2 agreed
On 05 Jun, 2020
Reviewers invited
Invitations sent on 04 Jun, 2020
Reviewer #1 agreed
On 04 Jun, 2020
Editor assigned
On 30 May, 2020
First submitted
On 29 May, 2020
Submission checks complete
On 29 May, 2020
Editor invited
On 29 May, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Ceramics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
In this work, 3D C f /SiBCN composites were fabricated by polymer infiltration and pyrolysis (PIP) with poly(methylvinyl)borosilazane as SiBCN precursor. The 3D microstructure evolution process of the composites was investigated by an advanced x-ray computed tomography (XCT). The effect of dicumyl peroxide (DCP) initiator addition on the crosslinking process, microstructure evolution and mechanical properties of the composites were uncovered. With the addition of DCP initiator, the liquid precursor can cross-link to solid-state at 120 °C. Moreover, DCP addition decreases the release of small molecule gas during pyrolysis, leading to an improved ceramic yield 4.67 times higher than that without DCP addition. After 7 PIP cycles, density and open porosity of the final Cf/SiBCN composite with DCP addition are 1.73 g·cm -3 and ~10%, respectively, which are 143.0% higher and 30.3% lower compared with the composites without DCP addition. As a result, the flexural strength and elastic modulus of Cf/SiBCN composites with DCP addition (371 MPa and 31 GPa) are 1.74 and 1.60 times higher than that without DCP addition (213 MPa and 19.4 GPa).
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Figure 11