Design, Manufacture, and Characterization of a Carbon Fiber‐Reinforced Silicon Carbide Nozzle Extension

Breede, Fabian; Hofmann, Severin; Jain, Neraj; Jemmali, Raouf

doi:10.1111/ijac.12496

Cited by 28 publications

(23 citation statements)

References 25 publications

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“…The application of ceramic matrix composites (CMCs) is highly dependent from the chosen fiber. Carbon fiber reinforced CMCs, such as C/SiC can be used for short time applications such as nozzles or thermal protection systems for aerospace vehicles [1][2][3]. For long time applications in high temperature environments silicon carbide fibers are utilized in SiC/SiC CMCs.…”

Section: Introductionmentioning

confidence: 99%

Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement

Mainzer

Lin

Frieß

et al. 2021

Journal of the European Ceramic Society

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Ceramic matrix composites usually utilize carbon or ceramic fibers as reinforcements. However, such fibers often expose a low ductility during failure. In this work, we follow the idea of a reinforcement concept of a ceramic matrix reinforced by refractory metal fibers to reach pseudo ductile behavior during failure. Tungsten and molybdenum fibers were chosen as reinforcement in SiCN ceramic matrix composites manufactured by polymer infiltration and pyrolysis process. The composites were investigated with respect to microstructure, flexural-and tensile strength. The single fiber strengths for both tungsten and molybdenum were investigated and compared to the strength of the composites. Tensile strengths of 206 and 156 MPa as well as bending strengths of 427 and 312 MPa were achieved for W/SiCN and Mo/SiCN composites, respectively. The W fiber became brittle across the entire cross section, while the Mo fiber showed a superficial, brittle reaction zone but kept ductile on the inside.

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Section: Introductionmentioning

confidence: 99%

Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement

Mainzer

Lin

Frieß

et al. 2021

Journal of the European Ceramic Society

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“…The application of such composites is highly dependent from the chosen fiber. Carbon fiber reinforced CMCs, like C/SiC usually are developed for friction applications as well as short time applications such as nozzles or thermal protection systems for aerospace vehicles [4][5][6]. Due to the oxidation sensitivity of carbon fibers, these composites are not regarded for long-time applications in high-temperature oxidative environments.…”

Section: Introductionmentioning

confidence: 99%

“…For the application in jet engines, such CMCs are equipped with additional environmental barrier coatings [7]. Since CVD-SiC coatings have proven to successfully protect in-house manufactured C/C-SiC composites under re-entry conditions, combustion chamber conditions or utilized as nozzle extension, half of the manufactured SiCN based composites were coated with CVD-SiC and compared to those without coating [4,20,21].…”

Section: Introductionmentioning

confidence: 99%

Characterization and application of a novel low viscosity polysilazane for the manufacture of C- and SiC-fiber reinforced SiCN ceramic matrix composites by PIP process

Mainzer

Lin

Jemmali

et al. 2019

Journal of the European Ceramic Society

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Four unidirectional fiber reinforced SiCN ceramic matrix composites were manufactured by means of polymer infiltration and pyrolysis. Two carbon fibers (T800H and Granoc XN90) as well as two silicon carbide fibers (Tyranno ZMI and SA3) without fiber coating were chosen. As matrix precursor, a poly(methylvinyl)silazane was investigated and utilized. The composites with the SA3 and the XN90 fiber had the highest tensile strengths of 478 and 288 MPa, respectively. It is considered that these high modulus fibers with the low modulus SiCN matrix create weak matrix composites. After exposure to air (T = 1200°C, 10 h), a significant decrease of the mechanical properties was found, caused by the burnout of carbon fibers and the oxidation through open pores stemming from the PIP process and SiCN/SiCN interfaces in case of the SiC fiber based composites.

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“…RFDA is particularly valued for very fast acquisition and processing and moreover for the accurate estimation of flexural modulus, shear modulus, and Poisson's ratio. [10][11][12][13][14][15] Conventionally the flexural modulus of the C/C-SiC materials is experimentally characterized via quasi-static bending tests. 5,6 In order to enhance numerical modeling via Finite Element Method (FEM), the consideration of the flexural modulus of the developed material sample at application temperature is even more profitable.…”

Section: Introductionmentioning

confidence: 99%

“…Since the middle 1980s, DLR has been developing a cost-efficient production route for CMC materials based on Liquid Silicon infiltration (LSI) 8,9 The resulting C/C-SiC composites allow thin-walled, complex components for example, for aerospace applications as well as thick plates for example, for brake discs. [10][11][12][13][14][15] Conventionally the flexural modulus of the C/C-SiC materials is experimentally characterized via quasi-static bending tests. At high temperatures the mechanical tests must be performed in inert atmosphere in order to prevent oxidation 16 Some typical flexural properties of C/C-SiC materials are given in.…”

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confidence: 99%

Evaluation of dynamic modulus measurement for C/C‐SiC composites at different temperatures

Hönig

Koch

Weber³

et al. 2019

Int J Applied Ceramic Tech

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The determination of elastic properties at application temperature is fundamental for the design of fibre reinforced ceramic composite components. An attractive method to characterize the flexural modulus at room and high temperature under specific atmosphere is the nondestructive Resonant Frequency Damping Analysis (RFDA). The objective of this paper was to evaluate and validate the modulus measurement via RFDA for orthotropic C/C‐SiC composites at the application temperature. At room temperature flexural moduli of C/C‐SiC with 0/90° reinforcement were measured under quasi‐static 4‐point bending loads and compared with dynamic moduli measured via RFDA longitudinally to fibre direction. The dynamic modulus of C/C‐SiC was then measured via RFDA up to 1250°C under flowing inert gas and showed an increase with temperature which fitted with literature values. The measured fundamental frequencies were finally compared to those resulting from numerical modal analyses. Dynamic and quasi‐static flexural moduli are comparable and the numerical analyses proved that bending modes are correctly modeled by means of dynamic modulus measured via RFDA. The nondestructive RFDA as well as the numerical modeling approach are suitable for evaluation of C/C‐SiC and may be transferred to other fibre reinforced ceramic composite materials.

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Design, Manufacture, and Characterization of a Carbon Fiber‐Reinforced Silicon Carbide Nozzle Extension

Cited by 28 publications

References 25 publications

Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement

Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement

Characterization and application of a novel low viscosity polysilazane for the manufacture of C- and SiC-fiber reinforced SiCN ceramic matrix composites by PIP process

Evaluation of dynamic modulus measurement for C/C‐SiC composites at different temperatures

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