Microstructure, tensile strength and thermostability of W-core SiC fibers with or without carbon coating

The tensile strengths of carbon-coated and non carbon-coated SiC filament by Chemical Vapor Deposition were tested, respectively, which were analyzed according to double-parameter Weibull distribution. Various techniques including XRD and SEM were also used to study the phase composition and microstructure of SiC filament. The result shows that carbon coating plays a very important role on increasing the tensile strength.

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Tensile strength and fracture surface characterization of Hi-Nicalon™ SiC fibers

Journal of Nuclear Materials ◽

10.1016/s0022-3115(00)00675-9 ◽

2001 ◽

Vol 289 (1-2) ◽

pp. 1-9 ◽

Cited By ~ 29

Author(s):

G.E. Youngblood ◽

Charles Lewinsohn ◽

R.H. Jones ◽

Akira Kohyama

Keyword(s):

Tensile Strength ◽

Fracture Surface ◽

Surface Characterization ◽

Sic Fibers

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Dimensional stability and tensile strength of irradiated Nicalon-CG and Hi-Nicalon SiC fibers

10.2172/319772 ◽

1997 ◽

Author(s):

G.E. Youngblood ◽

C.H. Jr. Henager ◽

D.J. Senor ◽

G.A. Newsome ◽

J.J. Woods

Keyword(s):

Tensile Strength ◽

Dimensional Stability ◽

Sic Fibers

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Preparation and Properties of SiC Fibers Containing Yttrium and Aluminum

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.827 ◽

2008 ◽

Vol 368-372 ◽

pp. 827-830 ◽

Cited By ~ 1

Author(s):

Da Xiang Yang ◽

Yong Cai Song

Keyword(s):

Heat Treatment ◽

Tensile Strength ◽

Oxygen Content ◽

Sintering Temperature ◽

Chemical Vapor ◽

Treatment Temperature ◽

Sintering Process ◽

Dispersion Strengthening ◽

Sic Fibers ◽

Different Temperatures

SiC fibers containing Y and Al were prepared by sintering the amorphous KD-Y fibers at different temperatures from 1200 to 1800 °C. The tensile strength of fibers increases when the sintering temperature increases from 1200 to 1400 °C due to the dispersion strengthening of β-SiC microcrystal and decreases to the lowest point when being sintered at 1600 °C, then rose again with the further increase of temperature to 1800 °C. The tensile strength reached to 2.15 GPa. The oxygen content of KD-Y fibers determined the properties of the sintered SiC fibers and sintering process. Through chemical vapor curing (CVC), the oxygen content was controlled below 7.0 wt% and the tensile strength of KD-Y fibers reached to 3.08 GPa. Further-more, the sintering process of KD-Y fibers was discussed and the grain size of β-SiC grew up with the heat treatment temperature.

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