Boron nitride-reinforced polysilazane-derived ceramic composites via direct-ink writing

James W. Kemp; Nadim S. Hmeidat; Brett G. Compton

doi:10.1111/jace.17084

Boron nitride-reinforced polysilazane-derived ceramic composites via direct-ink writing

James W. Kemp, Nadim S. Hmeidat, Brett G. Compton

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

38 Scopus citations

Abstract

In this study we investigate the use of hexagonal boron nitride (hBN) as a rheology modifier in polysilazane resin to enable direct-ink writing (DIW) of polysilazane-derived boron nitride-reinforced ceramic composites. hBN is shown to effectively modify the flow properties of the resin by imparting strong shear thinning and yield stress behavior, and to reduce the mass loss and shrinkage associated with the polymer-to-ceramic conversion process, when compared with unfilled polysilazane resin. DIW inks are formulated with 40 vol.% hBN and used print flexural specimens and complex structures with high resolution. Mechanical properties of the resulting polymer-derived ceramic composites were evaluated by 3-pt. flexure and Vickers microhardness. The printed composites exhibit flexural strength of 56.4 MPa and microhardness of 111.4 HV2.

Original language	English
Pages (from-to)	4043-4050
Number of pages	8
Journal	Journal of the American Ceramic Society
Volume	103
Issue number	8
DOIs	https://doi.org/10.1111/jace.17084
State	Published - Aug 1 2020
Externally published	Yes

Keywords

3D printing
boron nitride
ceramic
composite
preceramic polymer

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10.1111/jace.17084

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title = "Boron nitride-reinforced polysilazane-derived ceramic composites via direct-ink writing",

abstract = "In this study we investigate the use of hexagonal boron nitride (hBN) as a rheology modifier in polysilazane resin to enable direct-ink writing (DIW) of polysilazane-derived boron nitride-reinforced ceramic composites. hBN is shown to effectively modify the flow properties of the resin by imparting strong shear thinning and yield stress behavior, and to reduce the mass loss and shrinkage associated with the polymer-to-ceramic conversion process, when compared with unfilled polysilazane resin. DIW inks are formulated with 40 vol.% hBN and used print flexural specimens and complex structures with high resolution. Mechanical properties of the resulting polymer-derived ceramic composites were evaluated by 3-pt. flexure and Vickers microhardness. The printed composites exhibit flexural strength of 56.4 MPa and microhardness of 111.4 HV2.",

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AB - In this study we investigate the use of hexagonal boron nitride (hBN) as a rheology modifier in polysilazane resin to enable direct-ink writing (DIW) of polysilazane-derived boron nitride-reinforced ceramic composites. hBN is shown to effectively modify the flow properties of the resin by imparting strong shear thinning and yield stress behavior, and to reduce the mass loss and shrinkage associated with the polymer-to-ceramic conversion process, when compared with unfilled polysilazane resin. DIW inks are formulated with 40 vol.% hBN and used print flexural specimens and complex structures with high resolution. Mechanical properties of the resulting polymer-derived ceramic composites were evaluated by 3-pt. flexure and Vickers microhardness. The printed composites exhibit flexural strength of 56.4 MPa and microhardness of 111.4 HV2.

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KW - preceramic polymer

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Boron nitride-reinforced polysilazane-derived ceramic composites via direct-ink writing

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