Air oxidation of SiC fibers prepared from carbon fibers and SiO vapor

Lee, Dong-Bok; Shim, Woo Sun; Jang, Jin Sik; Lee, Jae Chun

doi:10.1007/bf03027050

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A flexural strength of ~280 MPa was reported in a 2D SiC fiber-SiC composite fabricated using the CVI process when no pyrolytic carbon coating was applied [8]. The sintered density of the composite was 2.78 g/cm 3 . Thus, the superior strength of 1750 o C-sintered composite fabricated using the present process was attributed to the higher density (3.16 g/cm 3 ) and the absence of fiber degradation.…”

Section: Resultsmentioning

confidence: 97%

“…The sintered density of the composite was 2.78 g/cm 3 . Thus, the superior strength of 1750 o C-sintered composite fabricated using the present process was attributed to the higher density (3.16 g/cm 3 ) and the absence of fiber degradation. A modification of the fiber-matrix interface, such as applying a pyrolytic carbon coating to the fibers, would further improve the toughness and strength, as reported in composites fabricated using the CVI process [8].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Process for dense 2D SiC fiber-SiC matrix composites

et al. 2007

View full text Add to dashboard Cite

A new process using SiC fiber fabrics and SiC tapes to produce dense 2D SiC fiber-SiC (SiC/SiC) composites is demonstrated. The strategy for fabricating the SiC/SiC composites involves: (i) alternately stacking the SiC fiber fabrics and SiC tapes at room temperature, (ii) pyrolyzing of the stacked composites, and (iii) hot-pressing the pyrolyzed composites. By controlling the hot-pressing temperature, it is possible to obtain dense 2D SiC/SiC composites with relative densities of > 98 %. The 2D SiC/SiC composites show no degradation of the SiC fibers and a higher mechanical strength.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Process for dense 2D SiC fiber-SiC matrix composites

et al. 2007

View full text Add to dashboard Cite

show abstract

“…But, the oxidation of carbon and the subsequent evolution of CO and CO 2 seemed to decrease the net weight gains. Therefore, it was presumed that most of the sample was oxidized at 1000 ¡ for 60 h. The oxidation rate of SCNFs is lower than that of the SiC fibers synthesized by reaction of activated carbon fiber with SiO gas [7]. It should be noted that SiC generally possesses an excellent protectiveness because of formation of SiO film [8].…”

Section: Resultsmentioning

confidence: 99%

Characterization of High Temperature Oxidation Properties of Silicon Carbide Nanofibers

Lee

Park

Lim

et al. 2004

MSF

Self Cite

View full text Add to dashboard Cite

Carbon nanofibers were reacted with SiO vapor generated from a mixture of Si and SiO2 to produce silicon carbide nanofibers at 1350oC for 2 h under vacuum. The obtained SiC nanofibers with a diameter ranging 100~200 nm had the specific surface area as high as 124 m2/g. The SiC nanofibers were not oxidation resistant, showing nearly complete oxidation at 1000 oC after about 60 h in air, though the oxidation product was amorphous silica which was generally considered to be oxidation resistant. The poor oxidation resistance was attributed to the inherent nanoporous nature of the fibers resulted from the gas-solid reaction.

show abstract