Two-dimensional SiC-C-SiC(O)fibre composite

Backhaus‐Ricoult, M.; Mozdzierz, N.

doi:10.1007/bf00349900

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…The lack of fiber pullout was due to the oxidation embrittlement of the fibers or the fiber coating [11,12]. The oxidation removed the carbon layer presented at the fiber/matrix interface and formed a silica layer on the fiber surface [13]. The weakened fibers led to the stress concentration at the perimeter of unbridged crack segment, causing the crack to extend.…”

Section: General Nature Of Fracture Surface Of the Tested Specimensmentioning

confidence: 98%

Fiber strength measurement for KD-I(f)/SiC composites and correlation to tensile mechanical behavior at room and elevated temperatures

Jing

Shi

Yang

et al. 2015

Ceramics International

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Section: General Nature Of Fracture Surface Of the Tested Specimensmentioning

confidence: 98%

Fiber strength measurement for KD-I(f)/SiC composites and correlation to tensile mechanical behavior at room and elevated temperatures

Jing

Shi

Yang

et al. 2015

Ceramics International

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“…In a reducing atmosphere, the C interphase reacts with SiOC and forms gaseous products and SiC. [ 155 ] SiC surface oxidation was modeled using an open system. Both Ar/O 2 and air conditions were considered for passive‐to‐active transition as shown in Figure .…”

Section: Propertiesmentioning

confidence: 99%

Polymer‐Derived High‐Temperature Nonoxide Materials: A Review

Zhou

2023

Adv Eng Mater

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The synthesis of polymer-derived nonoxide materials such as carbides, borides, and nitrides started in the 1970s and slowly progressed into the 1980s, with silicon carbide (SiC) fibers as the prime examples. [1] In the 1990s, the research activities in this area became more intensive, with multiple efforts devoted to understanding the polymer-to-ceramic conversion mechanisms, resulting microstructures, and mechanical properties. In the 2000s, relying on the liquid precursor nature and advancement in chemistry, new techniques (e.g., electrospinning, coating, and precursor infiltration) and new precursors were introduced. Understanding of the crosslinking and thermal conversion process was improved. For example, SiC fibers were improved from amorphous silicon oxycarbide (SiOC) to low-oxygen SiC fibers and then to near-stoichiometric SiC fibers. SiC thin films of 8-190 μm thickness were reported in 2009. [2] These films can stand alone, and high mechanical properties and optoelectronic properties were achieved. Because of these advantages, they were proposed to be used in microelectromechanical systems (MEMS) and optoelectronic devices. In recent decades, additive manufacturing was used to form complex shapes. [3] Also, different one-pot precursor synthesis approaches were reported. [4] The pyrolyzed ceramic systems were frequently used in a powder format and can be further processed with traditional forming processes such as spark plasma sintering, hot pressing, thermal treatment, etc. [5,6] The advantages of using the polymerderived approach for such high-temperature nonoxide material formations involve several aspects. Compositions can be designed based on molecular-level interactions and conversion of polymeric precursors to composites. Through a synergistic selection and combination of polymer molecules of different architectures and additives, a large family of functional, structural, resilient, and versatile materials can be created. Pyrolysis conditions can also be varied to create different property systems. Species intermixing can be achieved at the true atomic level. It enables functional properties for inert systems and harsh environmental stability for far-from-equilibrium conditions. Additional advantages include low processing temperature (such as a few hundred degrees Celsius lower) and versatile shape achievement. The final materials can be fibers, coatings, membranes, powders, bulk parts, porous forms, infiltrating phases, and complex 3D-printed shapes, [3a] among others. Using the polymer-derived approach to form high-temperature ceramics also enables composition homogeneity and purity, thanks to the uniform mixing of different precursors and additives and high-purity chemical precursors. It can also create compositions that may be impossible with conventional routes, [7] such as sintering.The common challenges are as follows. Polymer-derived nonoxide composites are in a metastable state. At high temperatures, the composition and microstructure can continue to evolve and

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