29
2024
-
08
Industry New Knowledge. The effect of ceramic layer height on the mechanical properties of fiber placement auxiliary material extrusion 3D printing Cf/SiC ceramic matrix composites.
Author:
Industry new knowledge
近日，北京理工大学Rujie He带领的团队在《Composites Communications》发表了题为Effects of ceramic layer height on the mechanical properties of Cf/SiC ceramic matrix composites fabricated by fiber-laying-assisted material extrusion 3D printing的研究，采用一种新技术结合Extrusion of auxiliary materials for fiber placement(ME) 3D Printing andprecursor infiltration pyrolysis(PIP) PreparationCarbon Fiber Reinforced Silicon Carbide Ceramic Matrix Composites（Cf/SiC CMCs）。
Original link: https://www.sciencedirect.com/science/article/abs/pii/S2452213924001177
Adventure Technology official website: http://www.adventuretech.cn/
If it cannot be opened, please copy the URL to the browser.
research content
Carbon Fiber Reinforced Silicon Carbide Ceramic Matrix Composites(Cf/SiC CMCs) has attracted wide attention because of its good oxidation resistance of silicon carbide ceramic matrix and high toughness of carbon fiber, but the traditional continuous carbon Cf/SiC CMCs preparation method can not meet the requirements of complex structure.
Therefore, this study adopts an innovative method to produce Cf/SiC CMC, which involvesExtrusion of auxiliary materials for fiber placement(ME)3D printing and thenPrecursor infiltration and pyrolysis(PIP). The effect of ceramic layer height on the characteristics of Cf/SiC CMC was studied in detail. The gap between the continuous fibers and the ceramic matrix can be eliminated by reducing the height of the ceramic layer.This work can provide valuable insights for the 3D printing of fiber-reinforced ceramic matrix composites.
1,(A) manufacturing process diagram of Cf/SiCCMCs and (B) designed Cf/SiCCMCs.
2,(A) Open porosity and density of Cf/SiCCMCs for different ceramic layer heights.
3, Scanning electron microscope images of Cf/SiCCMCs for different ceramic layer heights:(A)H0.50;(B)H0.75;(C)H1.00 and (D)H1.25.
△ Figure 4, Stress-strain curves and three-point bending strength for different ceramic layer heights Cf/SiCCMCs.
5, Side view of Cf/SiCCMCs with different ceramic layer heights in three-point bending test:(A)H0.50;(B)H0.75;(C)H1.00;(D)H1.25.
△ Figure 6. Fitting surface of the effect of continuous fiber spacing d and ceramic layer height h on the three-point bending strength.
7, Stress-strain curves and fracture toughness for different ceramic layer heights Cf/SiCCMCs.
8, Microstructure after H0.75 fracture toughness test:(A) Fracture and (B) Continuous carbon fiber bundle.
△ Figure 9, Fitting surface of the effect of continuous fiber spacing d and ceramic layer height h on fracture toughness.
△ Figure 10. Comparison of flexural strength and fracture toughness of fiber-reinforced silicon carbide composites reported in the literature.
research conclusion
In this study, high-performance Cf/SiCCMCs was successfully prepared by combining fiber laying auxiliary material extrusion (ME)3D printing and precursor impregnation and pyrolysis (PIP).
The effect of ceramic layer height on the properties of Cf/SiCCMCs was investigated.
A decrease in the height of the ceramic layer increases the fiber content.
With the increase of the height of the ceramic layer, the porosity decreases and the density increases accordingly.
There are more pores in the fiber bundle area and the fiber/ceramic interface, while the ceramic interface is less.
Reducing the height of the ceramic layer can reduce the gap between the fibers and the ceramic matrix.
With the increase of the height of the ceramic layer, the bending strength and fracture toughness first increase and then decrease.
When the thickness of the ceramic layer is 0.75mm, the bending strength and fracture toughness of Cf/SiCCMCs are the highest, which are 288.49 Mpa and 15.19 Mpa m ~(1/2), respectively.
This study is expected to provide valuable enlightenment for the 3D printing of fiber reinforced ceramic matrix composites.
Related News
Consult Now
If you are interested in our products, please leave your email and we will contact you as soon as possible, thank you!
Contact us
Shenzhen Address: Room 120, Park 1, Overseas Students Pioneer Park, Longgang District, Shenzhen City, Guangdong Province Foshan Address: 304-1, Building A, No. 92, Yanbu Sui Yanxi Road, dali town, Nanhai District, Foshan City, Guangdong Province
Link
We're here to answer all yourquestions. Fill out our contact formand we'll connect you with the peoplewho can help.
Follow us
Powered by: China Enterprise Power Shenzhen SEO Privacy Policy