Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers

The polymer-derived SiC fibers are mainly used as reinforcing materials for ceramic matrix composites (CMCs) because of their excellent mechanical properties at high temperature. However, decomposition reactions such as release of SiO and CO gases and the formation of pores proceed above 1400 °C bec...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Young-jun Joo, Sang-hyun Joo, Hyuk-jun Lee, Young-jin Shim, Dong-geun Shin, Kwang-youn Cho
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polycarbonsilane SiC fiber impurities control crystallization densification Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/218eb9adc3034eaca9de5d13c4e58820
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:218eb9adc3034eaca9de5d13c4e58820
record_format	dspace
spelling	oai:doaj.org-article:218eb9adc3034eaca9de5d13c4e588202021-11-25T18:30:57ZEffect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers10.3390/nano111129332079-4991https://doaj.org/article/218eb9adc3034eaca9de5d13c4e588202021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2933https://doaj.org/toc/2079-4991The polymer-derived SiC fibers are mainly used as reinforcing materials for ceramic matrix composites (CMCs) because of their excellent mechanical properties at high temperature. However, decomposition reactions such as release of SiO and CO gases and the formation of pores proceed above 1400 °C because of impurities introduced during the curing process. In this study, polycrystalline SiC fibers were fabricated by applying iodine-curing method and using controlled pyrolysis conditions to investigate crystallization and densification behavior. Oxygen and iodine impurities in amorphous SiC fibers were reduced without pores by diffusion and release to the fiber surface depending on the pyrolysis time. In addition, the reduction of the impurity content had a positive effect on the densification and crystallization of polymer-derived SiC fibers without a sintering aid above the sintering temperature. Consequently, dense Si-Al-C-O polycrystalline fibers containing β-SiC crystal grains of 50~100 nm were easily fabricated through the blending method and controlled pyrolysis conditions.Young-jun JooSang-hyun JooHyuk-jun LeeYoung-jin ShimDong-geun ShinKwang-youn ChoMDPI AGarticlepolycarbonsilaneSiC fiberimpurities controlcrystallizationdensificationChemistryQD1-999ENNanomaterials, Vol 11, Iss 2933, p 2933 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polycarbonsilane SiC fiber impurities control crystallization densification Chemistry QD1-999
spellingShingle	polycarbonsilane SiC fiber impurities control crystallization densification Chemistry QD1-999 Young-jun Joo Sang-hyun Joo Hyuk-jun Lee Young-jin Shim Dong-geun Shin Kwang-youn Cho Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers
description	The polymer-derived SiC fibers are mainly used as reinforcing materials for ceramic matrix composites (CMCs) because of their excellent mechanical properties at high temperature. However, decomposition reactions such as release of SiO and CO gases and the formation of pores proceed above 1400 °C because of impurities introduced during the curing process. In this study, polycrystalline SiC fibers were fabricated by applying iodine-curing method and using controlled pyrolysis conditions to investigate crystallization and densification behavior. Oxygen and iodine impurities in amorphous SiC fibers were reduced without pores by diffusion and release to the fiber surface depending on the pyrolysis time. In addition, the reduction of the impurity content had a positive effect on the densification and crystallization of polymer-derived SiC fibers without a sintering aid above the sintering temperature. Consequently, dense Si-Al-C-O polycrystalline fibers containing β-SiC crystal grains of 50~100 nm were easily fabricated through the blending method and controlled pyrolysis conditions.
format	article
author	Young-jun Joo Sang-hyun Joo Hyuk-jun Lee Young-jin Shim Dong-geun Shin Kwang-youn Cho
author_facet	Young-jun Joo Sang-hyun Joo Hyuk-jun Lee Young-jin Shim Dong-geun Shin Kwang-youn Cho
author_sort	Young-jun Joo
title	Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers
title_short	Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers
title_full	Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers
title_fullStr	Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers
title_full_unstemmed	Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers
title_sort	effect of impurities control on the crystallization and densification of polymer-derived sic fibers
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/218eb9adc3034eaca9de5d13c4e58820
work_keys_str_mv	AT youngjunjoo effectofimpuritiescontrolonthecrystallizationanddensificationofpolymerderivedsicfibers AT sanghyunjoo effectofimpuritiescontrolonthecrystallizationanddensificationofpolymerderivedsicfibers AT hyukjunlee effectofimpuritiescontrolonthecrystallizationanddensificationofpolymerderivedsicfibers AT youngjinshim effectofimpuritiescontrolonthecrystallizationanddensificationofpolymerderivedsicfibers AT donggeunshin effectofimpuritiescontrolonthecrystallizationanddensificationofpolymerderivedsicfibers AT kwangyouncho effectofimpuritiescontrolonthecrystallizationanddensificationofpolymerderivedsicfibers
_version_	1718411003056619520

Effect of Impurities Control on the Crystallization and Densification of Polymer-Derived SiC Fibers

Ejemplares similares