Details

Autor(en) / Beteiligte

• Utkin, A. V.
• Matvienko, A. A.
• Titov, A. T.
• Baklanova, N. I.

Titel

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

Ist Teil von

• Inorganic materials, 2011-10, Vol.47 (10), p.1066-1071

Ort / Verlag

Dordrecht: SP MAIK Nauka/Interperiodica

Erscheinungsjahr

2011

Quelle

2022 ECC(Springer)

Beschreibungen/Notizen

• We have studied the surface morphology, phase composition, and oxidation resistance of multilayered tetragonal zirconia coatings produced on silicon carbide fibers by a sol-gel process and measured the tensile strength of individual fibers as a function of the number of layers in the coating. SiC-fiber-reinforced silicon carbide minicomposites have been prepared through pyrolysis of an organosilicon polymer, and their fracture surfaces have been examined. Using microindentation, we have determined the critical fiber-matrix debonding stress. The results demonstrate that the ZrO 2 coating on the fibers has the form of uniform, weakly bonded layers. The presence of a multilayered ZrO 2 interphase alters the fracture behavior of the SiC/SiC composites. The fiber debond stress in the composites markedly decreases with an increase in the number of layers in the interphase.