Effects of ZrC coating on mechanical properties of PIP-C/SiC composites

Xiang, Yanhong; Cao, Feng

doi:10.1016/j.jallcom.2015.01.194

Cited by 13 publications

(5 citation statements)

References 19 publications

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“…Unfortunately, due to the rapid oxidation of carbon and ceramic matrix, C/C-UHTCs composites are lack of stability in air at elevated temperature [7], which limits their further applications in extremely environment.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube-toughened interlocking buffer layer to improve the adhesion strength and thermal shock resistance of SiC coating for C/C–ZrC–SiC composites

Zhuang

Ren

et al. 2015

Journal of Materiomics

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We constructed a novel CNT-toughened interlocking buffer layer, and investigated its effect on the bonding strength and thermal shock resistance of SiC coating on C/C-ZrC-SiC composites. P P P Pre-oxidation Micro-gaps CNTs ICVD CVD-SiC CNT-toughened interlocking buffer layer Abstract For the purpose of improving the interface adhesion strength and thermal shock resistance of SiC coating for C/C-ZrC-SiC composites, a carbon nanotube (CNT) -toughened interlocking buffer layer was constructed between the SiC coating and C/C-ZrC-SiC substrates by pre-oxidation and chemical vapor deposition. After incorporating CNTs, the fracture toughness of the buffer layer increased by 55.7%.The interface adhesion strength between SiC coating and C/C-ZrC-SiC composites was up to 6.8 N, which was 195.7% higher than that of the SiC coated specimens without CNT-toughened interlocking buffer layer. After 25-time thermal shock cycling between 1773 K and room temperature, the mass loss of the coated specimens decreased by 64.4%. The significant enhancement of interface bonding strength and thermal shock resistance of SiC coating was mainly due to the simultaneous existence of micronscale "pinning effect" of the inlaid SiC coating and nanoscale toughing mechanism of CNTs.

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Section: Introductionmentioning

confidence: 99%

Carbon nanotube-toughened interlocking buffer layer to improve the adhesion strength and thermal shock resistance of SiC coating for C/C–ZrC–SiC composites

Zhuang

Ren

et al. 2015

Journal of Materiomics

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“…The data show that the downstream pressure did not increase significantly for 23 h, while the upstream pressure was maintained at a constant level. The initial permeability was high relative to the 5 wt% NaCl and 5 wt% KCl solutions [34], and the initial permeability was higher. The time point when the permeability started to increase significantly was 33 h. The permeability increased from 2.0 × 10 −4 mD to 1.8 × 10 −3 mD in 11.11 h. When the downstream pressure began to increase, the permeability gradually increased to 9 × 10 −3 mD after 1 h, when the downstream pressure was consistent with the upstream pressure.…”

Section: Results Of Chemical Inhibition Experimentsmentioning

confidence: 85%

Experimental Water Activity Suppression and Numerical Simulation of Shale Pore Blocking

Shan,

Zhao,

Liu

et al. 2023

Processes

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The nanoscale pores in shale oil and gas are often filled with external nanomaterials to enhance wellbore stability and improve energy production. And there has been considerable research on discrete element blocking models and simulations related to nanoparticles. In this paper, the pressure transmission experimental platform is used to systematically study the influence law of different water activity salt solutions on shale permeability and borehole stability. In addition, the force model of the particles in the pore space is reconstructed to study the blocking law of the particle parameters and fluid physical properties on the shale pore space based on the discrete element hydrodynamic model. However, the migration and sealing patterns of nanomaterials in shale pores are unknown, as are the effects of changes in particle parameters on nanoscale sealing. The results show that: (1) The salt solution adopts a formate system, and the salt solution is most capable of blocking the pressure transmission in the shale pores when the water activity is 0.092. The drilling fluid does not easily penetrate into the shale pore space, and it is more capable of maintaining the stability of the shale wellbore. (2) For the physical blocking numerical simulation, the nanoparticle concentration is the most critical factor affecting the shale pore blocking efficiency. Particle size has a large impact on the blocking efficiency of shale pores. The particle diameter increases by 30% and the pore-blocking efficiency increases by 13% when the maximum particle size is smaller than the pore exit. (3) Particle density has a small effect on the final sealing effect of pore space. The pore-plugging efficiency is only increased by 4% as the particle density is increased by 60%. (4) Fluid viscosity has a significant effect on shale pore plugging. The increase in viscosity at a nanoparticle concentration of 1 wt% significantly improves the sealing effectiveness, specifically, the sealing efficiency of the 5 mPa-s nanoparticle solution is 16% higher than that of the 1 mPa-s nanoparticle solution. Finally, we present a technical basis for the selection of a water-based drilling fluid system for long horizontal shale gas drilling.

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“…Silicon-based ceramics and composites such as carbon ber reinforced SiC ceramic matrix composites (C f /SiC) are prime candidates for high-temperature structural materials of the gas turbine, heat-exchanger parts, rocket nozzles, etc owing to their light weight and excellent thermal and mechanical [1][2][3]. However, the carbon ber in C f /SiC composites is quickly oxidized when exposed in an extreme high-temperature and oxygen enriched operating environment [4][5][6][7]. Therefore, it is essential to prepare environmental barrier coatings (EBCs) on the external of C f /SiC composites to improve their adaptability to extreme operating environments.…”

Section: Introductionmentioning

confidence: 99%

Thermal Cycling Behavior of Bi-layer Yb2Si2O7/SiC EBC Coated Cf/SiC Composites in Burner Rig Tests

Chen¹,

Chen

Duan

et al. 2021

Preprint

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To improve the oxidation resistance of carbon fiber reinforced SiC ceramic matrix composites (Cf/SiC) at high-temperature and high-speed gas scour environment in burner rig tests, a novel bi-layer Yb2Si2O7/SiC EBC was prepared on the surface of Cf/SiC composites by chemical vapor deposition (CVD) and sol-gel method united with air spraying. Results show that bi-layer Yb2Si2O7/SiC coating showed better oxidation resistance for Cf/SiC specimens before 20 thermal cycles (300 min), which can efficiently prevent the oxidation of Cf/SiC specimens in a gas scour environment at 1773 K for 300 min with a weight loss of 5.93 × 10-3 g·cm-2. After 20 thermal cycles (≥300 min), the weight loss of the coated specimen is rapidly increased due to the formation of penetrating cracks. After the corrosion of 36 thermal cycles (540 min), some obvious annular corrosion pit area were found on the surface of Yb2Si2O7 outer coating, the center of the corrosion pit was easier to be the origin area of the cracks due to the greater impact force of the gas.

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Effects of ZrC coating on mechanical properties of PIP-C/SiC composites

Cited by 13 publications

References 19 publications

Carbon nanotube-toughened interlocking buffer layer to improve the adhesion strength and thermal shock resistance of SiC coating for C/C–ZrC–SiC composites

Carbon nanotube-toughened interlocking buffer layer to improve the adhesion strength and thermal shock resistance of SiC coating for C/C–ZrC–SiC composites

Experimental Water Activity Suppression and Numerical Simulation of Shale Pore Blocking

Thermal Cycling Behavior of Bi-layer Yb2Si2O7/SiC EBC Coated Cf/SiC Composites in Burner Rig Tests

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Effects of ZrC coating on mechanical properties of PIP-C/SiC composites

Cited by 13 publications

References 19 publications

Carbon nanotube-toughened interlocking buffer layer to improve the adhesion strength and thermal shock resistance of SiC coating for C/C–ZrC–SiC composites

Carbon nanotube-toughened interlocking buffer layer to improve the adhesion strength and thermal shock resistance of SiC coating for C/C–ZrC–SiC composites

Experimental Water Activity Suppression and Numerical Simulation of Shale Pore Blocking

Thermal Cycling Behavior of Bi-layer Yb2Si2O7/SiC EBC&nbsp;Coated Cf/SiC&nbsp;Composites in Burner Rig Tests

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Thermal Cycling Behavior of Bi-layer Yb2Si2O7/SiC EBC Coated Cf/SiC Composites in Burner Rig Tests