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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 感谢参与,应助指数 +1 fancy方知(sunshan4379代发): 金币+50 2020-04-19 18:37:15 sunshan4379: LS-EPI+1, 感谢应助! 2020-04-19 18:37:21
Preparation and Properties of Skin-core Structure Silicon Carbide Ceramic Fibers
Accession number: 20192206992320
Title of translation: 皮芯结构碳化硅陶瓷纤维的制备及性能
Authors: Xu, Zhaofang 1 ; Chen, Yuanlan 1 ; Li, Xiaohong 1 ; Liao, Hongmin 1 ; Zhou, Changchang 1 ; Li, Yang 1
Author affiliation : 1 School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang; 550025, China
Corresponding author: Li, Yang (liyang3300@163.com)
Source title: Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
Abbreviated source title: Kuei Suan Jen Hsueh Pao
Volume: 47
Issue: 3
Issue date: March 1, 2019
Publication Year: 2019
Pages: 358-364
Language: Chinese
ISSN: 04545648
CODEN: KSYHA5
Document type: Journal article (JA)
Publisher: Chinese Ceramic Society
Abstract: Polycarbosilane (PCS) fibers were heat treated via atmosphere pulse in pulsing air and vacuum atmosphere. The skin-core structure silicon carbide (SiC) ceramic fibers were prepared via the pyrolysis of PCS fibers in inert atmosphere. The effect of pulse oxidation time on the weight gain, chemical structure, Si-H reaction degree, oxygen element distribution of the PCS fibers, crystal structure and mechanical properties of the SiC fibers was investigated. The results show that the PCS fibers are thermal oxidation curing in atmosphere pulse treatment. The thermal oxidation reaction mainly occurs on the outside-surface of the PCS fibers, forming the oxygen-containing structures such as Si-OH, Si-O-Si and C=O. The oxygen element presents a gradient distribution characteristic. The surface is rich in oxygen and the core has a lower oxygen content. When the gel appears, the PCS fibers have a lower thermal oxidation mass fraction and Si-H reaction degree due to pulse thermal oxidation, i.e., 7.03% and 25.37%. The sintered SiC fibers have the same oxygen element distribution in the cross-section and with β-SiC crystal structure. The SiC ceramic fibers obtained by this method are a skin-core structure, having a preferable tensile strength of (1.74±0.21)GPa.
© 2019, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
Number of references: 16
Main heading: Crystal structure
Controlled terms: Ceramic materials - Curing - Fibers - Oxygen - Polysilanes - Refractory materials - Silicon carbide - Tensile strength - Thermooxidation
Uncontrolled terms: Element distribution - Gradient distributions - Inert atmospheres - Polycarbosilanes - Silicon carbide ceramic - Silicon carbides (SiC) - Skin-core structure - Thermal oxidation
Classification code: 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 812.1 Ceramics - 812.2 Refractories - 815.1.2 Inorganic Polymers - 933.1.1 Crystal Lattice
Numerical data indexing: Percentage 2.54e+01%, Percentage 7.03e+00%
DOI: 10.14062/j.issn.0454-5648.2019.03.11
Database: Compendex
Compilation and indexing terms, © 2020 Elsevier Inc. |
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