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CN-224199303-U - Toughened impact-resistant ceramic structural member

CN224199303UCN 224199303 UCN224199303 UCN 224199303UCN-224199303-U

Abstract

The utility model discloses a toughened impact-resistant ceramic structural member which comprises a ceramic matrix, wherein a locating frame is arranged on the outer wall of the ceramic matrix, high-strength fibers are filled in the ceramic matrix, a nanoparticle layer is arranged in the ceramic matrix, a honeycomb supporting layer is arranged in the ceramic matrix, a micro-crack layer is arranged in the ceramic matrix, and a layered gradient structure layer is arranged in the ceramic matrix.

Inventors

  • SU YONGDONG

Assignees

  • 苏州永佳超硬耐磨材料有限公司

Dates

Publication Date
20260505
Application Date
20250529

Claims (6)

  1. 1. The toughened impact-resistant ceramic structural member is characterized by comprising a ceramic matrix (2), wherein a locating frame (1) is arranged on the outer wall of the ceramic matrix (2), high-strength fibers (3) are filled in the ceramic matrix (2), a nanoparticle layer (4) is arranged in the ceramic matrix (2), a honeycomb supporting layer (5) is arranged in the ceramic matrix (2), a microcrack layer (6) is arranged in the ceramic matrix (2), and a layered gradient structure layer (7) is arranged in the ceramic matrix (2).
  2. 2. The toughened and impact-resistant ceramic structure as claimed in claim 1, wherein the high-strength fibres (3) embedded in the ceramic matrix (2) may be carbon fibres, silicon carbide fibres, the high-strength fibres (3) being primarily for fibre bridging and crack deflection mechanisms to absorb energy.
  3. 3. The toughened impact resistant ceramic structure as claimed in claim 1, wherein the added nanoparticles of the nanoparticle layer (4) within the ceramic matrix (2) hinder grain boundary slip for increasing the impact resistance of the ceramic matrix (2).
  4. 4. The toughened and impact-resistant ceramic structural member as claimed in claim 1, wherein said honeycomb supporting layer (5) is internally provided with a cellular porous frame for absorbing impact energy by deforming the walls of the pores, and said honeycomb supporting layer (5) is controlled to have a balance of porosity and strength porosity of 20% -40%.
  5. 5. The toughened and impact-resistant ceramic structure as claimed in claim 1, wherein the microcrack layer (6) provided in the ceramic matrix (2) is primarily intended to induce crack propagation along a specific path to avoid sudden fracture.
  6. 6. The toughened and impact-resistant ceramic structure as claimed in claim 1, wherein the layered gradient structure layer (7) mounted in the ceramic matrix (2) is of a shell-like pearl layer structure, the layered gradient structure layer (7) being alternately stacked with high strength layers Al 2 O 3 and ductile layers such as metals or polymers to delay the failure by interfacial delamination and crack branching.

Description

Toughened impact-resistant ceramic structural member Technical Field The utility model relates to the technical field of ceramic structural parts, in particular to a toughened impact-resistant ceramic structural part. Background The toughened and impact-resistant ceramic structural member is a structural member which enhances the toughness of ceramic materials through a specific technical means so as to improve the impact resistance of the ceramic materials, and the ceramic materials have the advantages of high melting point, high hardness, high wear resistance, oxidation resistance and the like, but the brittleness limits the wide application of the ceramic materials, and the toughness of the ceramic materials is enhanced through various toughening mechanisms, so that the durability and the reliability of the ceramic materials in practical application are enhanced. Aiming at the related technology, the ceramic material has the advantages of good high melting point, high hardness, high wear resistance, oxidation resistance and the like, but has the problems of relatively brittle whole body, relatively poor toughness, relatively low structural strength, cracking, breaking and the like after being subjected to external impact. Accordingly, the present utility model provides a toughened impact resistant ceramic structure to solve the above-mentioned problems. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a toughened impact-resistant ceramic structural member, which solves the problems. The toughened and impact-resistant ceramic structural member comprises a ceramic matrix, wherein a locating frame is arranged on the outer wall of the ceramic matrix, high-strength fibers are filled in the ceramic matrix, a nanoparticle layer is arranged in the ceramic matrix, a honeycomb supporting layer is arranged in the ceramic matrix, a microcrack layer is arranged in the ceramic matrix, and a layered gradient structure layer is arranged in the ceramic matrix. Through the technical scheme, the ceramic matrix has good toughness and impact strength. Further, carbon fibers and silicon carbide fibers can be used as the high strength fibers embedded in the ceramic matrix, and the high strength fibers are mainly used for fiber bridging and crack deflection mechanisms to absorb energy. Through the technical scheme, the fiber is subjected to multi-stage energy dissipation such as fracture, extraction, interfacial debonding and the like when the crack is expanded, so that the toughness of the ceramic matrix is improved. Further, the nano particles of the nano particle layer added in the ceramic matrix block grain boundary sliding and are used for increasing the impact resistance of the ceramic matrix. Through the technical scheme, the nano particles block grain boundary sliding, the whiskers bridge cracks, and meanwhile, extra energy is consumed for crack propagation. Furthermore, a honeycomb porous frame is designed in the honeycomb supporting layer, impact energy is absorbed through hole wall deformation, and the honeycomb supporting layer needs to balance the porosity and the strength porosity to be controlled at 20% -40%. Through the technical scheme, the ceramic body has good impact resistance. Further, the micro-crack layer arranged in the ceramic matrix is mainly used for inducing crack propagation along a specific path to avoid sudden fracture. Through the technical scheme, the use stability of the ceramic matrix is improved, and the problems of sudden cracking and the like are prevented. Further, the layered gradient structure layer installed in the ceramic matrix simulates a shell pearl layer structure, and the layered gradient structure layer is alternately stacked with high-strength layers Al 2O3 and toughness layers such as metal or polymer, and the fracture is delayed by interfacial peeling and crack bifurcation. Through the technical scheme, the impact strength of the ceramic matrix can be increased, and the safety of the ceramic matrix is improved. Advantageous effects The utility model provides a toughened impact-resistant ceramic structural member. Compared with the prior art, the method has the following beneficial effects: (1) The toughened impact-resistant ceramic structural member mainly embeds high-strength fibers in the ceramic matrix through the high-strength fibers arranged in the ceramic matrix, particularly, carbon fibers and silicon carbide fibers can be used, the high-strength fibers are mainly used for fiber bridging and crack deflection mechanism energy absorption, multistage energy dissipation such as fracture, extraction, interfacial debonding and the like occurs when cracks are expanded, the fracture toughness is remarkably improved, the overall toughness of the ceramic matrix can be increased, a nanoparticle layer arranged in the ceramic matrix blocks grain boundary sliding, whiskers bridge cracks, additional energy is consumed for crack expansion a