Oxidation of carbon fibers coated with pyrolytic silicon carbide

Kilin, V. S.; Cherednik, E. M.; Lebedev, Yu. N.; Dergunova, V. S.; Ostrovskii, V. S.

doi:10.1007/bf00790738

Cited by 6 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Oxidation resistance of carbon particles can be enhanced by coating them with thin layers of HfB 2 [3], SiC [9,10], TiN [9], ZrC [10] or MgAl 2 O 4 [11]. In this paper, a process for chemical vapor deposition (CVD) of AlN coatings on carbon particles is presented.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric pressure microwave plasma fluidized bed CVD of AlN coatings

Pajkic

Willert‐Porada

2009

Surface and Coatings Technology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Atmospheric pressure microwave plasma fluidized bed CVD of AlN coatings

Pajkic

Willert‐Porada

2009

Surface and Coatings Technology

View full text Add to dashboard Cite

“…If such coatings would become available, then implementation of a deliberate amount of C‐fiber reinforcement into Si 3 N 4 ‐matrix ceramics with any type of additive phase would become feasible. The oxidation resistance of carbon fibers can be increased by coating them with borides (HfB 2 ), carbides (SiC), nitrides (TiN), or aluminates (MgAl 2 O 4 ) . In the past, some of these nitrides (TiN), carbides (TiC), or silicides (MoSi 2 ) were also investigated as additives for Si 3 N 4 ceramics .…”

Section: Introductionmentioning

confidence: 99%

High Temperature Behavior of Si₃N₄ and Yb₂SiO₅ Coated Carbon Fibers for Silicon‐Nitride CMC

Pontiller

Willert‐Porada

2014

Adv Eng Mater

View full text Add to dashboard Cite

For oxide-free ceramic matrix composites (CMC), with Si 3 N 4 matrix and carbon fiber reinforcement, for extreme high temperature applications, protective coatings of the C-fibers are investigated. Two different coatings are compared: reactive CVD-derived pure Si 3 N 4 coatings to investigate C-fiber-matrix reactions and powder based Yb-silicate coatings to reveal potential reactions with the Yb-silicate additive serving as sintering aid for Si 3 N 4 . The reactivity toward carbon in nitrogen atmosphere is studied in the temperature interval from 20°C up to 1700°C. A new ceramic phasean Yb-carbidonitiridosilicate, Yb 2 Si 4 CN 6 -is found as product of carbothermal reduction of the Yb-silicate. The carbothermal reduction occurs also with other RE-silicates, RE ¼ Yb, Er, Y, Gd, and Sm while SiC is found as reaction product on carbon fibers coated with pure Si 3 N 4 . The oxidation resistance of the coated fibers in air was investigated in the temperature interval up to 1000°C, and the apparent activation energy of oxidation was analyzed based on DTA-EGA results. The oxidation kinetic reveals a significant increase of onset point of oxidation temperature by up to 150 K for Si 3 N 4 coated short carbon fibers obtained from the reactive CVD coating process. Such fibers have a high application potential for carbon-fiber reinforced Si 3 N 4 -CMC. The role of Yb 2 Si 4 CN 6 as reinforcement for Si 3 N 4 -CMC is discussed based on bond strength comparison of carbides (SiC), nitride silicates (SiAlON), and nitrides

show abstract