A Review of Nanoceramic Materials for Use in Ceramic Matrix Composites

Suib, Steven L.

doi:10.1007/978-3-319-49512-5_7

Cited by 7 publications

(7 citation statements)

References 38 publications

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“…As shown in Figure 4, the measured tensile strengths vary according to the gauge lengths of single‐fiber specimens. When the gauge length is 25.4 mm, the measured tensile strength is 2.77 ± 0.26 GPa, close to the value of 2.8 GPa reported in the literature 12,21,27,28 . As the gauge length increases, however, the measured tensile strength decreases to 2.53 ± 0.27 and 2.39 ± 0.23 GPa at gauge lengths of 228.6 and 330.2 mm, respectively.…”

Section: Resultssupporting

confidence: 85%

“…When the gauge length is 25.4 mm, the measured tensile strength is 2.77 ± 0.26 GPa, close to the value of 2.8 GPa reported in the literature. 12,21,27,28 As the gauge length increases, however, the measured tensile strength decreases to 2.53 ± 0.27 and 2.39 ± 0.23 GPa at gauge lengths of 228.6 and 330.2 mm, respectively. This finding suggests that surface or volume defects 29,30 play a key role in the tensile strength limit and brittle behavior of Hi-Nicalon fibers.…”

Section: Ex Situ Tensile Testingmentioning

confidence: 98%

“…No references were found on modeling of the PIP process for CMCs, though experimental studies on this manufacturing process have been reported. Studies on polycarbosilanederived SiC ceramic 25 and SiC/SiC composite 26,27 have shown that porosity decreases and mechanical properties improve with the increasing number of PIP cycles. Zhu et al 28 show that increasing pyrolysis temperature and the concentration of SiC fillers in polycarbosilane polymer result in improved mechanical properties in two-dimensional Carbon/ SiC (C/SiC) composites fabricated using the PIP process.…”

Section: Introductionmentioning

confidence: 99%

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In situ tensile behavior of Hi‐Nicalon silicon carbide fibers exposed to high‐temperature argon plasma

et al. 2021

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Direct mechanical characterization of silicon carbide fibers in extreme hypersonic aerothermal environment is critical to the development of next-generation inflatable thermal protection systems that could enable delivery of large payloads to planetary surfaces. In this article, we report direct measurements of tensile properties in Hi-Nicalon silicon carbide fibers exposed to high-temperature argon plasma exceeding 1100°C using an in situ mechanical testing system integrated into a 30-kW inductively coupled plasma torch chamber simulating the hypersonic atmospheric entry conditions. As a comparison, ex situ tensile tests were performed on virgin Hi-Nicalon silicon carbide fibers in both ambient air and vacuum conditions. In situ thermal and optical imaging was used to obtain a real-time resolution of the thermo-mechanical events occurring on the fibers during the high-temperature argon plasma exposure. It is found that the hightemperature tensile strength of Hi-Nicalon fiber tows exposed to argon plasma is 0.74 ± 0.19 GPa, which denotes a 59% reduction from the virgin fiber strength in ambient air (1.81 ± 0.19 GPa). Fractographic characterization by scanning electron microscopy shows that the substantial degradation of tensile strength in Hi-Nicalon fibers results from a reduction of fiber cross-section due to active surface attack from high-temperature argon plasma.

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Section: Resultssupporting

confidence: 85%

Section: Ex Situ Tensile Testingmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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In situ tensile behavior of Hi‐Nicalon silicon carbide fibers exposed to high‐temperature argon plasma

et al. 2021

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“…Xu et al [11] developed an Al 2 O 3 matrixbased composite with glass beads and silica, but revealed that utilisation of fabricated composite may be restricted at high temperatures because of poor mechanical properties and low thermal stability. The Yttria Stabilised Zirconia-based composite, reinforced with silicon carbide, showed improved fracture strength and hardnesss, in comparison to Yttria Stabilised Zirconia [12][13][14]. For enhancing durability of ceramic composites in the structural applications, high hardness reinforcements have been used in these composites [15,16].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of carbon nanotubes-Cr₂O₃thermal barrier coatings in actual boiler

Goyal

Singh²,

Bhatia³

2019

Surface Engineering

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Hot corrosion behaviour of Carbon Nanotubes (CNT) reinforced Cr 2 O 3 composite coatings have been investigated in actual boiler environment of a thermal power plant at 900°C under cyclic thermal loading conditions. The CNT content was varied from 1 to 8 wt-% and the coatings were deposited with the high-velocity oxy-fuel method. The comparative effects of variation in CNT content (from 1 to 8 wt-%) on hot corrosion behaviour were studied by weight change analysis and corrosion products were analysed with X-ray diffraction, scanning electron microscopy, energy dispersive and cross-sectional analysis techniques. The results confirmed that variation in CNT content enhanced the corrosion resistance of surface coatings in actual boiler environment at elevated temperature. The coatings showed lower weight gain along with the formation of protective oxide scales during the experiment. Reduction in corrosion rates during hot corrosion was observed with an increase in CNT content in the coating matrix.

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“…The mechanical properties of these coatings downgrade due to high value of porosity, which in turn affects the corrosion resistance of these coatings. Researchers have used composite materials to improve the mechanical and microstructural properties of thermal spray coatings by using high hardness reinforcements [17][18][19][20][21]. In recent past, carbon nanotubes (CNT) are emerged as excellent reinforcement materials for composites due to their excellent mechanical properties including strength, modulus, stiffness which exceeds properties of all current materials [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Improving hot corrosion resistance of Cr₃C₂–20NiCr coatings with CNT reinforcements

Goyal

2019

Surface Engineering

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Carbon Nanotubes (CNT) reinforced Cr 3 C 2 -20NiCr composite coatings were prepared and deposited on alloy steel using high-velocity oxyfuel (HVOF) thermal spraying method. The comparative effects of variation in CNT content (from 1 to 2 weight percentage) on mechanical properties and hot corrosion behaviour in super-heater zone of actual coal-fired boiler of a thermal power plant at 900°C have been investigated. After exposure to boiler environment, the corrosion products have been analysed by thermogravimetric analysis, Xray diffraction, scanning electron microscopy, energy dispersive and cross-sectional analysis techniques. The results confirmed that variation in CNT content improved the mechanical and microstructural properties of surface coatings by modifying their surface characteristics. The variation in CNT content improved the corrosion protection property of composite coating at high temperature of exposure. Reduction in corrosion rate was observed with increase in CNT content from 1 to 2 weight percentage in the Cr 3 C 2 -20NiCr coating matrix.

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A Review of Nanoceramic Materials for Use in Ceramic Matrix Composites

Cited by 7 publications

References 38 publications

In situ tensile behavior of Hi‐Nicalon silicon carbide fibers exposed to high‐temperature argon plasma

In situ tensile behavior of Hi‐Nicalon silicon carbide fibers exposed to high‐temperature argon plasma

Behaviour of carbon nanotubes-Cr₂O₃thermal barrier coatings in actual boiler

Improving hot corrosion resistance of Cr₃C₂–20NiCr coatings with CNT reinforcements

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A Review of Nanoceramic Materials for Use in Ceramic Matrix Composites

Cited by 7 publications

References 38 publications

In situ tensile behavior of Hi‐Nicalon silicon carbide fibers exposed to high‐temperature argon plasma

In situ tensile behavior of Hi‐Nicalon silicon carbide fibers exposed to high‐temperature argon plasma

Behaviour of carbon nanotubes-Cr2O3thermal barrier coatings in actual boiler

Improving hot corrosion resistance of Cr3C2–20NiCr coatings with CNT reinforcements

Contact Info

Product

Resources

About

Behaviour of carbon nanotubes-Cr₂O₃thermal barrier coatings in actual boiler

Improving hot corrosion resistance of Cr₃C₂–20NiCr coatings with CNT reinforcements