Preparation method of metal/nonmetal complex hierarchical nacreous layer bionic structure

A non-metal and nacre technology, applied in the field of bionic structure preparation, to achieve uniform distribution of stress field and strain field, increase firmness, and increase fracture toughness.

Pending Publication Date: 2021-07-09
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to address these problems in the prior art, to provide a method for preparing a metal / non-metallic complex layer nacre bionic structure, which can obtain a shell-like nacre structure composed of "brick-bridge-mud", To solve the trade-off between strength and toughness that complex engineering structures often face, so that complex engineering structures have high strength and high toughness at the same time. In order to achieve the above purpose, the technical solution provided by the present invention is:

Method used

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  • Preparation method of metal/nonmetal complex hierarchical nacreous layer bionic structure
  • Preparation method of metal/nonmetal complex hierarchical nacreous layer bionic structure
  • Preparation method of metal/nonmetal complex hierarchical nacreous layer bionic structure

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Embodiment 1

[0024] Such as figure 1 , figure 2 As shown, in this embodiment, a method for preparing a metal / non-metal complex hierarchical nacre biomimetic structure is prepared by using a laser powder bed fusion multi-material complex structure platform, which is characterized in that it includes the following steps:

[0025] (1) Use Solidworks to build a complex layered nacre "brick 8-bridge 6-mud 7" bionic structure, such as figure 2 shown, and converted into an STL file and imported into the operating system of the preparation platform, wherein the length of a single brick 8 in the z direction is 1 mm; the length of the mud 7 in the "brick 8-mud 7" structure in the z direction is 1 mm ;The length of the mud 7 in the "bridge 6-mud 7" structure in the z direction is 0.6mm; the length of the bridge 6 in the "bridge 6-mud 7" structure in the z direction is 0.6mm;

[0026] (2) Select 316L metal powder, deposit it in the powder feeding cylinder under the preparation platform, select PA1...

Embodiment 2

[0035] Such as figure 1 , image 3 As shown, in this embodiment, a method for preparing a metal / non-metal complex hierarchical nacre biomimetic structure is prepared by using a laser powder bed fusion multi-material complex structure platform, which is characterized in that it includes the following steps:

[0036] (1) Use Solidworks to build a complex layered nacre "brick 8-bridge 6-mud 7" bionic structure, such as image 3 shown, and converted into an STL file and imported into the operating system of the preparation platform, wherein the length of a single brick 8 in the z direction is 1 mm; the length of the mud 7 in the "brick 8-mud 7" structure in the z direction is 1 mm ; The length of the mud 7 in the "bridge 6-mud 7" structure in the z direction is 0.6 mm; the length of the bridge 6 in the "bridge 6-mud 7" structure in the z direction is 0.6 mm; "brick 8-bridge 6- The size of the bridge 6 in the mud 7" structure on the x-y plane is 0.6mm×0.6mm;

[0037] (2) Select ...

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Abstract

The invention discloses a preparation method of a metal / nonmetal complex hierarchical nacreous layer bionic structure. The preparation method adopts a platform of a laser powder bed to melt a multi-material complex structure, and comprises the following steps: constructing a'brick-bridge-mud 'bionic structure; storing metal powder in a lower powder feeding cylinder of the preparation platform, and storing non-metal powder in a storage cabin of a powder feeding system on the preparation platform; selectively printing a'brick 'or'brick-bridge' structure on a forming substrate; selectively printing a'mud 'structure, and printing a'brick-mud' or'brick-bridge-mud 'structure with a certain thickness; selectively printing a'bridge 'structure on the'brick-mud' structure or the'brick-bridge-mud 'structure; selectively printing a'mud 'structure, and printing a'bridge-mud' structure with a certain thickness; and repeating the steps, and printing all the'brick-bridge-mud 'bionic structures. According to the preparation method, the overall fracture toughness of the material is increased, the firmness of resisting structural damage is increased, and the problem of balancing the toughness of the complex engineering structure material is solved.

Description

technical field [0001] The invention relates to a method for preparing a biomimetic structure, in particular to a method for preparing a biomimetic structure of a metal / nonmetal complex layer nacre, and belongs to the technical field of laser powder bed additive manufacturing. Background technique [0002] Engineering structural materials for key parts of construction machinery equipment usually need to be strong and tough. Unfortunately, strength and toughness are usually mutually exclusive, and traditional engineering structural materials often face a trade-off between strength and toughness. A large number of natural biological structures / materials that exist in nature, after long-term evolution, their structure and function adapt to nature almost perfectly, especially the shell nacre structure, which consists of a large number of crystalline aragonite sheets (hard phase layer) and a small amount of biopolymers Layers (soft phase layers) are stacked together, forming a "s...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F7/02B33Y10/00B33Y50/02
CPCB22F7/02B33Y10/00B33Y50/02
Inventor仲高艳宋凌峰卞玉超
OwnerNANJING AGRICULTURAL UNIVERSITY