Processing and characterization of cobalt silicide nanoparticle-containing silicon carbide fibers through a colloidal method and their underlying mechanism

2014 ◽  
Vol 2 (25) ◽  
pp. 4980-4988 ◽  
Author(s):  
Liu Anhua ◽  
Chen Jianming ◽  
Ding Shaonan ◽  
Yao Yanbo ◽  
Liu Ling ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Underlying Mechanism ◽  
Cobalt Silicide ◽  
Sic Fibers ◽  
Silicon Carbide Fibers ◽  
Colloidal Method

Cobalt-containing silicon carbide (Co–SiC) fibers were synthesized through a colloidal method.

Characterization of Boron Nitride Coated Silicon Carbide Fibers and Composites

1997 ◽  
Vol 3 (S2) ◽  
pp. 733-734
Author(s):  
Mani Gopal
Keyword(s):  
Silicon Carbide ◽  
Boron Nitride ◽  
High Temperatures ◽  
Specimen Preparation ◽  
Ion Milling ◽  
Sic Fibers ◽  
Silicon Carbide Fibers ◽  
Pull Out ◽  
Sic Composites

Silicon carbide (SiC) composites are receiving much attention for structural use at high temperatures. One class of composites are those reinforced with SiC fibers. The SiC fibers are coated with boron nitride (BN) which is weakly bonded to the fiber. During fracture, the coating deflects cracks causing pull-out of the fibers (Fig. 1). This process of fiber pull-out consumes energy and increases the toughness of the composite. Although much work has been done on characterizing these materials by SEM, not much has been done using TEM due to difficulties in specimen preparation. The purpose of this study is to characterize these fibers and composites using conventional and analytical TEM.In this study, TEM specimens were prepared by dimpling and ion milling. Careful control of the preparation was needed to ensure the integrity of the SiC-BN interface. Figure 2a is a TEM image of the fiber showing delamination at the SiC-BN interface.

scholarly journals Research Progress on Microstructure Characterization of Silicon Carbide Fibers

2021 ◽  
Vol 2101 (1) ◽  
pp. 012086
Author(s):  
Xingjian Zhang ◽  
Zixi Cai ◽  
Jinjuan Fan ◽  
Changkui Liu ◽  
Jinfa Ye
Keyword(s):  
Silicon Carbide ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Microstructure Characterization ◽  
Research Progress ◽  
Matrix Composites ◽  
Sic Fibers ◽  
Advantages And Disadvantages ◽  
Silicon Carbide Fibers

Abstract Ceramic matrix composites have excellent properties such as high temperature resistance and oxidation resistance, and have good application prospects in the hot end parts of engines. In ceramic matrix composites, the microstructure composition of silicon carbide fibers determines their macroscopic properties. Therefore, this article takes silicon carbide fiber as the research object, summarizes the existing SiC fibers structure, composition, and morphology characterization methods, compares the development and advantages and disadvantages of XRD, SEM, TEM and other testing equipment analysis, and proposes The problems of sample preparation, surface defects and internal structure changes in the microstructure characterization of silicon carbide fibers are discussed, which provides a reference for the preparation of high-performance SiC fibers and the improvement of their characterization work.

Synthesis and characterization of polysilane precursors for silicon carbide fibers

1995 ◽  
Vol 10 (10) ◽  
pp. 2659-2667 ◽  
Author(s):  
Wayne R.I. Cranstone ◽  
Suzannc M. Bushnell-Watson ◽  
John H. Sharp
Keyword(s):  
Silicon Carbide ◽  
Alkali Metal ◽  
Gel Permeation Chromatography ◽  
Thermomechanical Analysis ◽  
Synthesis And Characterization ◽  
Silicon Carbide Fibers ◽  
Gel Permeation

A series of polysilanes was prepared by the alkali metal dechlorination of chlorosilane monomers, in which the overall functionality, F, of the reaction was varied. Starting monomers of functionality f = 2.0 and 3.0 were reacted together in various proportions to achieve values of F of 2.2, 2.35, and 2.5. In addition to varying the functionality of the reaction, three different difunctional monomers, dimethyldichlorosilane (DMDCS), diphenyldichlorosilane (DPDCS), and methylphenyldichlorosilane (MPDCS), and two trifunctional monomers, phenyltrichlorosilane (PTCS) and ethyltrichlorosilane (ETCS), were used. The effect of these changes on the yields of the polysilanes was determined, and the products were investigated by the use of thermogravimetry (TG), gel permeation chromatography (GPC), and thermomechanical analysis (TMA). The ability to spin a polysilane fiber was also assessed.

Preparation and characterization of silicon carbide fibers from activated carbon fibers

Carbon ◽  
2002 ◽  
Vol 40 (5) ◽  
pp. 715-720 ◽  
Author(s):  
Zhenyu Ryu ◽  
Jingtang Zheng ◽  
Maozhang Wang ◽  
Bijiang Zhang
Keyword(s):  
Silicon Carbide ◽  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Silicon Carbide Fibers

Preparation and characterization of multilayered ZrO2 coatings on silicon carbide fibers for SiC/SiC composites

2011 ◽  
Vol 47 (10) ◽  
pp. 1066-1071
Author(s):  
A. V. Utkin ◽  
A. A. Matvienko ◽  
A. T. Titov ◽  
N. I. Baklanova
Keyword(s):  
Silicon Carbide ◽  
Silicon Carbide Fibers ◽  
Sic Composites

Characterization of Dip-Coated Boron Nitride on Silicon Carbide Fibers

1994 ◽  
Vol 77 (4) ◽  
pp. 1011-1016 ◽  
Author(s):  
Lu Shen ◽  
Beng Jit Tan ◽  
William S. Willis ◽  
Francis S. Galasso ◽  
Steven L. Suib
Keyword(s):  
Silicon Carbide ◽  
Boron Nitride ◽  
Silicon Carbide Fibers

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

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