Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor
Continuous ceramic fiber comprising silicon carbide–zirconium carbide (SiC–ZrC) binary phases was obtained through melt spinning, electron-beam curing and pyrolysis of a pre-ceramic precursor of polyzirconocenecarbosilanes (PZCS). After pyrolysis and heat treatment, ZrC particles with mean diameters...
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2020-05-01
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Online Access: | https://www.mdpi.com/1996-1944/13/9/2142 |
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author | Min Ge Xiaoxu Lv Hao Zhang Shouquan Yu Zhenxi Lu Weigang Zhang |
author_facet | Min Ge Xiaoxu Lv Hao Zhang Shouquan Yu Zhenxi Lu Weigang Zhang |
author_sort | Min Ge |
collection | DOAJ |
description | Continuous ceramic fiber comprising silicon carbide–zirconium carbide (SiC–ZrC) binary phases was obtained through melt spinning, electron-beam curing and pyrolysis of a pre-ceramic precursor of polyzirconocenecarbosilanes (PZCS). After pyrolysis and heat treatment, ZrC particles with mean diameters of 15–20 nm were formed and homogeneously dispersed in a matrix of fine crystalline β-SiC with an average grain size of 6–10 nm. Concentration of Zr in the fiber varies from 14.88% to 17.45% by mass. Fibers consisting of near-stoichiometric ZrC and SiC with little free carbon can be obtained through pyrolysis decarbonization of the as-cured fiber in hydrogen from room temperature to 1000 °C, and subsequently heat treatment in argon up to 1600 °C for 1 h. High-temperature treatment of these amorphous inorganic fibers leads to crystallization of the binary phases of β-SiC and ZrC. The removal of free carbon under hydrogen results in more rapid growth of β-SiC and ZrC crystals, in which obvious aggregation of the dispersed ZrC particles among the continuous β-SiC matrix can be ascribed to a fast migration of Zr cation. |
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id | doaj.art-70622f7a0aea4a158d8e1752cca03979 |
institution | Directory Open Access Journal |
issn | 1996-1944 |
language | English |
last_indexed | 2024-03-10T20:01:20Z |
publishDate | 2020-05-01 |
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spelling | doaj.art-70622f7a0aea4a158d8e1752cca039792023-11-19T23:34:42ZengMDPI AGMaterials1996-19442020-05-01139214210.3390/ma13092142Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric PrecursorMin Ge0Xiaoxu Lv1Hao Zhang2Shouquan Yu3Zhenxi Lu4Weigang Zhang5State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaNational Key Laboratory of Advanced Composites, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing 100095, 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, ChinaContinuous ceramic fiber comprising silicon carbide–zirconium carbide (SiC–ZrC) binary phases was obtained through melt spinning, electron-beam curing and pyrolysis of a pre-ceramic precursor of polyzirconocenecarbosilanes (PZCS). After pyrolysis and heat treatment, ZrC particles with mean diameters of 15–20 nm were formed and homogeneously dispersed in a matrix of fine crystalline β-SiC with an average grain size of 6–10 nm. Concentration of Zr in the fiber varies from 14.88% to 17.45% by mass. Fibers consisting of near-stoichiometric ZrC and SiC with little free carbon can be obtained through pyrolysis decarbonization of the as-cured fiber in hydrogen from room temperature to 1000 °C, and subsequently heat treatment in argon up to 1600 °C for 1 h. High-temperature treatment of these amorphous inorganic fibers leads to crystallization of the binary phases of β-SiC and ZrC. The removal of free carbon under hydrogen results in more rapid growth of β-SiC and ZrC crystals, in which obvious aggregation of the dispersed ZrC particles among the continuous β-SiC matrix can be ascribed to a fast migration of Zr cation.https://www.mdpi.com/1996-1944/13/9/2142ceramic fibersilicon carbidezirconium carbide |
spellingShingle | Min Ge Xiaoxu Lv Hao Zhang Shouquan Yu Zhenxi Lu Weigang Zhang Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor Materials ceramic fiber silicon carbide zirconium carbide |
title | Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor |
title_full | Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor |
title_fullStr | Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor |
title_full_unstemmed | Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor |
title_short | Microstructures of a SiC–ZrC Ceramic Fiber Derived from a Polymeric Precursor |
title_sort | microstructures of a sic zrc ceramic fiber derived from a polymeric precursor |
topic | ceramic fiber silicon carbide zirconium carbide |
url | https://www.mdpi.com/1996-1944/13/9/2142 |
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