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Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4)
Composite ceramic fibers comprising about 80 wt% boron nitride (h-BN) and 20 wt% Si(3)N(4) were fabricated through melt-spinning, electron-beam curing, and pyrolysis up to 1600 °C in atmospheres of NH(3) and N(2), using a mixture of poly[tri(methylamino)borazine] (PBN) and polysilazane (PSZ). By ana...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6926597/ https://www.ncbi.nlm.nih.gov/pubmed/31756990 http://dx.doi.org/10.3390/ma12233812 |
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author | Tan, Jing Ge, Min Yu, Shouquan Lu, Zhenxi Zhang, Weigang |
author_facet | Tan, Jing Ge, Min Yu, Shouquan Lu, Zhenxi Zhang, Weigang |
author_sort | Tan, Jing |
collection | PubMed |
description | Composite ceramic fibers comprising about 80 wt% boron nitride (h-BN) and 20 wt% Si(3)N(4) were fabricated through melt-spinning, electron-beam curing, and pyrolysis up to 1600 °C in atmospheres of NH(3) and N(2), using a mixture of poly[tri(methylamino)borazine] (PBN) and polysilazane (PSZ). By analyzing the microstructure and composition of the pyrolyzed ceramic fibers, we found the formation of binary phases including crystalline h-BN and amorphous Si(3)N(4). Further investigations confirmed that this heterogeneous microstructure can only be formed when the introduced ratio of Si(3)N(4) is below 30% in mass. The mean modulus and tensile strength of the fabricated composite fibers were about 90 GPa and 1040 MPa, twice the average of the pure h-BN fiber. The dielectric constant and dielectric loss tangent of the composite fibers is 3.06 and 2.94 × 10(−3). |
format | Online Article Text |
id | pubmed-6926597 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69265972019-12-24 Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) Tan, Jing Ge, Min Yu, Shouquan Lu, Zhenxi Zhang, Weigang Materials (Basel) Article Composite ceramic fibers comprising about 80 wt% boron nitride (h-BN) and 20 wt% Si(3)N(4) were fabricated through melt-spinning, electron-beam curing, and pyrolysis up to 1600 °C in atmospheres of NH(3) and N(2), using a mixture of poly[tri(methylamino)borazine] (PBN) and polysilazane (PSZ). By analyzing the microstructure and composition of the pyrolyzed ceramic fibers, we found the formation of binary phases including crystalline h-BN and amorphous Si(3)N(4). Further investigations confirmed that this heterogeneous microstructure can only be formed when the introduced ratio of Si(3)N(4) is below 30% in mass. The mean modulus and tensile strength of the fabricated composite fibers were about 90 GPa and 1040 MPa, twice the average of the pure h-BN fiber. The dielectric constant and dielectric loss tangent of the composite fibers is 3.06 and 2.94 × 10(−3). MDPI 2019-11-20 /pmc/articles/PMC6926597/ /pubmed/31756990 http://dx.doi.org/10.3390/ma12233812 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tan, Jing Ge, Min Yu, Shouquan Lu, Zhenxi Zhang, Weigang Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) |
title | Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) |
title_full | Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) |
title_fullStr | Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) |
title_full_unstemmed | Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) |
title_short | Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si(3)N(4) |
title_sort | microstructures and properties of ceramic fibers of h-bn containing amorphous si(3)n(4) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6926597/ https://www.ncbi.nlm.nih.gov/pubmed/31756990 http://dx.doi.org/10.3390/ma12233812 |
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