Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si3N4

Composite ceramic fibers comprising about 80 wt% boron nitride (h-BN) and 20 wt% Si3N4 were fabricated through melt-spinning, electron-beam curing, and pyrolysis up to 1600 °C in atmospheres of NH3 and N2</su...

Full description

Bibliographic Details
Main Authors:	Jing Tan, Min Ge, Shouquan Yu, Zhenxi Lu, Weigang Zhang
Format:	Article
Language:	English
Published:	MDPI AG 2019-11-01
Series:	Materials
Subjects:	polymer-derived ceramics fibers boron nitride silicon nitride
Online Access:	https://www.mdpi.com/1996-1944/12/23/3812

id	doaj-d70b50fc6df4491ab597a5111e68a1b7
record_format	Article
spelling	doaj-d70b50fc6df4491ab597a5111e68a1b72020-11-25T02:00:17ZengMDPI AGMaterials1996-19442019-11-011223381210.3390/ma12233812ma12233812Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>Jing Tan0Min Ge1Shouquan Yu2Zhenxi Lu3Weigang Zhang4State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaComposite ceramic fibers comprising about 80 wt% boron nitride (h-BN) and 20 wt% Si<sub>3</sub>N<sub>4</sub> were fabricated through melt-spinning, electron-beam curing, and pyrolysis up to 1600 °C in atmospheres of NH<sub>3</sub> and N<sub>2</sub>, 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<sub>3</sub>N<sub>4</sub>. Further investigations confirmed that this heterogeneous microstructure can only be formed when the introduced ratio of Si<sub>3</sub>N<sub>4</sub> 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<sup>−3</sup>.https://www.mdpi.com/1996-1944/12/23/3812polymer-derived ceramicsfibersboron nitridesilicon nitride
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Jing Tan Min Ge Shouquan Yu Zhenxi Lu Weigang Zhang
spellingShingle	Jing Tan Min Ge Shouquan Yu Zhenxi Lu Weigang Zhang Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub> Materials polymer-derived ceramics fibers boron nitride silicon nitride
author_facet	Jing Tan Min Ge Shouquan Yu Zhenxi Lu Weigang Zhang
author_sort	Jing Tan
title	Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>
title_short	Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>
title_full	Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>
title_fullStr	Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>
title_full_unstemmed	Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>
title_sort	microstructures and properties of ceramic fibers of h-bn containing amorphous si<sub>3</sub>n<sub>4</sub>
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2019-11-01
description	Composite ceramic fibers comprising about 80 wt% boron nitride (h-BN) and 20 wt% Si<sub>3</sub>N<sub>4</sub> were fabricated through melt-spinning, electron-beam curing, and pyrolysis up to 1600 °C in atmospheres of NH<sub>3</sub> and N<sub>2</sub>, 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<sub>3</sub>N<sub>4</sub>. Further investigations confirmed that this heterogeneous microstructure can only be formed when the introduced ratio of Si<sub>3</sub>N<sub>4</sub> 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<sup>−3</sup>.
topic	polymer-derived ceramics fibers boron nitride silicon nitride
url	https://www.mdpi.com/1996-1944/12/23/3812
work_keys_str_mv	AT jingtan microstructuresandpropertiesofceramicfibersofhbncontainingamorphoussisub3subnsub4sub AT minge microstructuresandpropertiesofceramicfibersofhbncontainingamorphoussisub3subnsub4sub AT shouquanyu microstructuresandpropertiesofceramicfibersofhbncontainingamorphoussisub3subnsub4sub AT zhenxilu microstructuresandpropertiesofceramicfibersofhbncontainingamorphoussisub3subnsub4sub AT weigangzhang microstructuresandpropertiesofceramicfibersofhbncontainingamorphoussisub3subnsub4sub
_version_	1724961569678295040

Microstructures and Properties of Ceramic Fibers of h-BN Containing Amorphous Si<sub>3</sub>N<sub>4</sub>

Similar Items