Ceramic material additive manufacturing method

A technology for additive manufacturing and ceramic materials, applied in the direction of additive processing, etc., can solve the problems of inability to achieve additive manufacturing of silicon carbide ceramic powder, hinder the solid-phase crystallization reaction of ceramic particles, weaken the strength of materials, etc., and achieve one-time molding. , wide applicability, the effect of improving the density

Pending Publication Date: 2018-12-07
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is the introduction of impurity elements different from the composition of ceramic particles, such as sodium, fluorine, phosphorus, iron, etc., which hinder the solid-phase crystallization reaction of ceramic particles, thereby weakening the material strength, or causing a decline in other aspects of performance
At the same time, since these technologies need to use ultraviolet radiation to cure the adhesive, it is impossible to realize the additive manufacturing of absorbing materials such as silicon carbide or colored ceramic powders.

Method used

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  • Ceramic material additive manufacturing method
  • Ceramic material additive manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Additive manufacturing method of alumina ceramics

[0054] 1) Model design and layering: Design the part model to be printed, use computer software to layer, calculate the area to be bonded for each layer, and generate a printer control program including the adhesive injection path.

[0055] 2) Preparation of alumina ceramic powder raw material: select alumina ceramic powder with a particle diameter of 60 nm as the raw material, and put it into the feed tray of the ceramic powder bonded printer.

[0056] 3) The calculated ratio of the adhesive: use bisphenol F glycidyl ether (BFDGE) as the epoxy resin monomer, which contains two epoxy functional groups on each molecule; use diethyltoluenediamine (DETDA) As a hardener, it contains two amine functional groups per molecule. The amine functional groups on each hardener are selected to correspond to 2.2 epoxy functional groups on the epoxy resin monomer, so the molar ratio of BFDGE and DETDA can be determined ...

Embodiment 2

[0061] Embodiment 2: Additive manufacturing method of silicon carbide ceramics

[0062] 1) model design and stratification: same as embodiment 1;

[0063] 2) Preparation of silicon carbide ceramic powder raw materials: mix β-SiC powder with a particle size of 100nm and trace C and B powders in a ratio of 100:3:1 as raw materials;

[0064] 3) The calculation ratio of the adhesive: use a mixture of triepoxyphenyl p-aminophenol (TGAP) and tetraepoxyphenyl diaminodiphenylmethane (TGDDM) as the epoxy resin monomer, which corresponds to each molecule Contains three or four epoxy functional groups; Diethyltoluenediamine (DETDA) is used as a hardener, which contains two amine functional groups per molecule. The amine functional groups on each hardener are selected to correspond to the epoxy functional groups on the two epoxy resin monomers, so the molar ratio of TGAP, TGDDM and DETDA can be determined to be 2:1:5.

[0065] 4) Adjust the delivery speed of the hardener delivery pipe a...

Embodiment 3

[0069] Embodiment 3: Additive manufacturing method of ferrite ceramics

[0070] 1) For the model design and layering, the calculation ratio of the adhesive, and the printing process, please refer to Example 1 or Example 2.

[0071] 2) Preparation of ferrite ceramic powder raw material: Manganese-zinc ferrite powder with brand PC40 was used as raw material.

[0072] 3) According to the aforementioned method, after the ceramic body is printed and cleaned, the ceramic body is placed in a sintering furnace, heated to 140°C, and kept for 3 hours to remove the moisture contained in it; then heated to 600°C in an air environment ℃, keep warm for 6 hours to remove the binder components; finally, heat to 1200 ℃ in an inert gas environment, keep warm for 5 hours, so that the manganese zinc ferrite powder is sintered into finished solid ceramic parts.

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Abstract

The invention relates to a ceramic material additive manufacturing method. The method includes performing layering on a ceramic part model to be printed, and determining areas where each layer needs to be bonded; laying a layer of ceramic powder on a work tray; spraying a thermosetting resin adhesive in the area where the layer needs to be bonded by using a nozzle, the thermosetting resin adhesiveincluding an epoxy resin monomer and a hardener; heating the thermosetting resin adhesive on the layer of the ceramic powder by using a heating device to be in thermal curing cross-linking polymerization so that the layer of the ceramic powder can be bonded; performing layer by layer printing until a complete ceramic body can be formed; cleaning the ceramic body; and putting the cleaned ceramic body into a sintering furnace to perform calcining so that a compact ceramic part finished product can be formed. Equipment which can realize the manufacturing method is also provided.

Description

technical field [0001] The present invention relates to a molding method of ceramic materials, in particular to a ceramic material additive manufacturing method based on additive manufacturing technology, that is, three-dimensional object manufacturing technology. Background technique [0002] Ceramic materials have the advantages of low density, high hardness, high heat resistance, high wear resistance, etc., and have excellent application prospects in a wide range of industrial fields, such as heat insulation, heat-resistant materials, ceramic bearings, etc. The traditional method of molding ceramic materials is to put ceramic raw materials, usually powder or slurry, into a mold for high-temperature sintering to form a blank, and then use mechanical cutting and grinding methods for finishing to obtain the final product. However, due to the characteristics of high melting point, hard and brittle and difficult to process ceramic materials, the traditional forming method need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/26C04B35/565C04B35/622B33Y10/00B33Y70/00B33Y80/00
CPCB33Y10/00B33Y70/00B33Y80/00C04B35/10C04B35/2658C04B35/565C04B35/622C04B2235/6026C04B2235/606C04B2235/656C04B2235/6567
Inventor 林彬王皓吉魏金花李晓雷赵菲菲
Owner TIANJIN UNIV
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