Inorganic random networks composed of silicon, boron, nitrogen, and carbon constitute a novel class of ceramics with outstanding durability at elevated temperatures. The only approach known to their synthesis is the pyrolysis of appropriate pre-ceramic polymers, which on their part are either accessible via co-condensation of different molecular species, or by polycondensation of single source precursors exhibiting structural features that are desired to be present in the final ceramics. In this report the different synthetic routes known to date have been compiled and critically assessed. Although the reliable knowledge of this rather young class of materials is still limited, their fundamental features with respect to structures and performance have already began to shine through. The range of their properties — mainly depending on the synthetic route, but to some extent also on the composition — is quite considerable. The upper limits for thermal loads with respect to the onset of weight loss (decomposition) in an inert atmosphere, to the onset of crystallization and phase separation, and to the resistance to oxidation in air, seem to be ∼2000 °C, ∼1900 °C, and ∼1500 °C, respectively. Some representatives show unique combinations of properties, relevant for an application at high temperatures, which clearly surpass those of SiC or Si3N4. For instance, fibers made of SiBN3C, derived from the single source precursor Cl3Si(NH)BCl2, keeps its high mechanical durability, as measured by creep resistance and tensile strength, up to temperatures of ∼1400 °C.

Amorphous Multinary Ceramics in the Si-B-N-C System

To improve the performance of SiC fiber-reinforced SiC matrix composite (SiC/SiC composite), a polymer impregnation and pyrolysis process (PIP process) has been developed by incorporating an inert filler with polyvinylsilane. Composites consolidated with slurries of various filler contents were thoroughly examined at each repetition of the PIP process. The fiber volume fraction and matrix microstructure in the composites were determined during consolidation as a function of the filler content. Densification behavior during multiple PIP processing was much dependent on the microstructure formed in consolidation. Transmission electron microscopy revealed the effect of filler content on the microstructure of the matrix and of the fiber/matrix interface. In addition, the relationships between the microstructure and the mechanical properties were evaluated from a fundamental viewpoint.

Effect of SiC particle dispersion on microstructure and mechanical properties of polymer-derived SiC/SiC composite

Development of SiC/SiC composites by PIP in combination with RS

The temperature dependence of tensile fracture behavior and tensile strength of a two-dimensional woven BN-coated Hi-Nicalon™ SiC fiber-reinforced SiC matrix composite fabricated by polymer infiltration pyrolysis (PIP) were studied. A tensile test of the composite was conducted in air at temperatures of 298 (room temperature), 1200, 1400, and 1600 K. The composite showed a nonlinear behavior for all the test temperatures; however, a large decrease in tensile strength was observed above 1200 K. Young's modulus was estimated from the initial linear regime of the tensile stress–strain curves at room and elevated temperatures, and a decrease in Young’s modulus became significant above 1200 K. The multiple transverse cracking that occurred was independent of temperature, and the transverse crack density was measured from fractographic observations of the tested specimens at room and elevated temperatures. The temperature dependence of the effective interfacial shear stress was estimated from the measurements of the transverse crack density. The temperature dependence of in situ fiber strength properties was determined from fracture mirror size on the fracture surfaces of fibers. The decrease in the tensile strength of the composite up to 1400 K was attributed to the degradation in the strength properties of in situ fibers, and to the damage behavior exception of the fiber properties for 1600 K.

Temperature Dependence of Tensile Strength for a Woven Boron-Nitride-Coated Hi-Nicalon™ SiC Fiber-Reinforced Silicon-Carbide-Matrix Composite

The effect of surface-modified SiTiCO (Tyranno®) fiber on the tensile behavior of SiC-matrix minicomposites has been examined. Standard SiTiCO fiber and two kinds of surface-modified fibers were used and the composites were fabricated by a polymer infiltration pyrolysis process. The strengths of the surface-modified-fiber-reinforced minicomposites were significantly improved compared to that of the standard fiber minicomposite. The scattering of tensile strength also decreased with the use of surface-modified fibers. The results demonstrate the achievement of SiTiCO-fiber-reinforced SiC-matrix composite by modifying the surface chemistry of the fiber.

Tensile Fracture Behavior and Strength of Surface-Modified SiTiCO Fiber SiC-Matrix Minicomposites Fabricated by the PIP Process

Some Mechanical Properties of Sic(Hinicalon™) Fiber-Reinforced Sic Matrix Nicaloceram™ Composites

Acoustic Emission and Fracture Behavior of SiC Fiber‐Reinforced Si‐N‐C Matrix Composite Fabricated by PIP Process

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

H. Iba

Author Tools

Chat about Author

Papers

Some Mechanical Properties of Sic(Hinicalon™) Fiber-Reinforced Sic Matrix Nicaloceram™ Composites

Acoustic Emission and Fracture Behavior of SiC Fiber‐Reinforced Si‐N‐C Matrix Composite Fabricated by PIP Process