Iodine diffusion during iodine-vapor curing and its effects on the morphology of polycarbosilane/silicon carbide fibers

2015 ◽  
Vol 132 (47) ◽  
pp. n/a-n/a ◽  
Author(s):  
Junsung Hong ◽  
Kwang-Youn Cho ◽  
Dong-Geun Shin ◽  
Jung-Il Kim ◽  
Doh-Hyung Riu
Keyword(s):  
Silicon Carbide ◽  
Iodine Vapor ◽  
Silicon Carbide Fibers ◽  
Iodine Diffusion

TEM of grain growth and phase transformations during creep of SCS-6 silicon carbide fibers

1995 ◽  
Vol 53 ◽  
pp. 350-351
Author(s):  
L. A. Giannuzzi ◽  
C. A. Lewinsohn ◽  
C. E. Bakis ◽  
R. E. Tressler
Keyword(s):  
Silicon Carbide ◽  
Creep Rate ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Primary Creep ◽  
Excess Carbon ◽  
Silicon Carbide Fibers ◽  
Sic Fiber ◽  
Carbon Core ◽  
Grain Width

The SCS-6 SiC fiber is a 142 μm diameter fiber consisting of four distinct regions of βSiC. These SiC regions vary in excess carbon content ranging from 10 a/o down to 5 a/o in the SiC1 through SiC3 region. The SiC4 region is stoichiometric. The SiC sub-grains in all regions grow radially outward from the carbon core of the fiber during the chemical vapor deposition processing of these fibers. In general, the sub-grain width changes from 50nm to 250nm while maintaining an aspect ratio of ~10:1 from the SiC1 through the SiC4 regions. In addition, the SiC shows a <110> texture, i.e., the {111} planes lie ±15° along the fiber axes. Previous has shown that the SCS-6 fiber (as well as the SCS-9 and the developmental SCS-50 μm fiber) undergoes primary creep (i.e., the creep rate constantly decreases as a function of time) throughout the lifetime of the creep test.

Iron Nanoparticle-Containing Silicon Carbide Fibers Prepared by Pyrolysis of Fe(CO)5-Doped Polycarbosilane Fibers

2010 ◽  
Vol 93 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Xiaojun Chen ◽  
Zhiming Su ◽  
Li Zhang ◽  
Ming Tang ◽  
Yuxi Yu ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Iron Nanoparticle ◽  
Silicon Carbide Fibers

Carbon—Silicon-Carbide Fibers Prepared from Solid Solutions of Cellulose in N-Methylmorpholine-N-Oxide with Added Tetraethoxysilane

2017 ◽  
Vol 49 (4) ◽  
pp. 231-236 ◽  
Author(s):  
I. S. Makarov ◽  
L. K. Golova ◽  
G. N. Bondarenko ◽  
I. Yu. Skvortsov ◽  
A. K. Berkovich ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Solid Solutions ◽  
Silicon Carbide Fibers

Silicon Carbide Fibers Made from Nano-Powders

2014 ◽  
pp. 105-111
Author(s):  
Antoine Malinge ◽  
Yann Le Petitcorps ◽  
René Pailler ◽  
Aurelie Coupé ◽  
Philippe Poulin ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Silicon Carbide Fibers

In-situ generation of graphene network in silicon carbide fibers: Role of iodine and carbon monoxide

Carbon ◽  
2020 ◽  
Vol 158 ◽  
pp. 110-120
Author(s):  
Junsung Hong ◽  
Youngjin Ko ◽  
Kwang-Yeon Cho ◽  
Dong-Geun Shin ◽  
Prabhakar Singh ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Silicon Carbide ◽  
Silicon Carbide Fibers ◽  
In Situ Generation

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.

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