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MAX phase metal ceramic indirect additive manufacturing method

A cermet, additive manufacturing technology, applied in additive processing, metal processing equipment, transportation and packaging, etc., to achieve the effect of low cost of printing equipment and good quality of printed products

Inactive Publication Date: 2020-10-27
LISHUI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to manufacture ceramic parts with complex structures in near net shape, and to provide a low-cost ceramic indirect additive manufacturing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, put the binder that accounts for 30% of the total volume of the feed into a Sigma powder mixer, and stir and mix for 2 hours at a temperature of 170 ° C. The binder is made of the following raw materials in parts by weight: cellulose acetate butyrate 30 parts of vegetable matter, 72 parts of polyethylene glycol, 2.5 parts of stearic acid, and 0.4 parts of phenothiazine; then use a granulator to prepare granular feed with a diameter of less than 5mm; use an injection machine to manufacture wire feed for indirect additive manufacturing The temperature of the injection nozzle is 160°C; then obtain a wire with a diameter of 1mm, load the wire into a conventional plastic 3D printer with a print nozzle temperature of 160°C, import it into the plastic printer according to computer modeling, and print the green body. Put the printed green body into the distilled water solvent and keep it at 40°C for 10h. After drying for 30 minutes, put it into a degreasing sinter...

Embodiment 2

[0023] Embodiment 2, put the binder that accounts for 25% of the total volume of the feed into a Sigma powder mixer, and stir and mix for 3 hours at a temperature of 160 ° C. The binder is made of the following raw materials in parts by weight: cellulose acetate butyrate 27 parts of vegetable matter, 80 parts of polyethylene glycol, 2 parts of stearic acid, and 0.5 part of phenothiazine; then use a granulator to prepare granular feeds with a diameter of less than 5mm; use an injection machine to manufacture wire feeds for indirect additive manufacturing The temperature of the injection nozzle is 170°C; then the filament with a diameter of 3mm is obtained, and the filament is loaded on a conventional plastic 3D printer with a print nozzle temperature of 170°C, imported into the plastic printer according to computer modeling, and the green body is printed. Put the printed green body into the distilled water solvent and keep it at 50°C for 8h. After drying for 40 minutes, put it ...

Embodiment 3

[0024] Embodiment 3, put the binder that accounts for 35% of the total volume of the feed into a Sigma powder mixer, and stir and mix for 1 hour at a temperature of 180 ° C. The binder is made of the following raw materials in parts by weight: cellulose acetate butyrate 25 parts of vegetable matter, 75 parts of polyethylene glycol, 3 parts of stearic acid, and 0.4 part of phenothiazine; then use a granulator to prepare granular feeds with a diameter of less than 5mm; use an injection machine to manufacture wire feeds for indirect additive manufacturing The temperature of the injection nozzle is 180°C; then obtain a wire with a diameter of 4mm, load the wire into a conventional plastic 3D printer with a print nozzle temperature of 180°C, import it into the plastic printer according to computer modeling, and print the green body. Put the printed green body into the distilled water solvent and keep it at 60°C for 5h. After drying for 90 minutes, put it into a degreasing sintering...

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Abstract

The invention discloses a MAX phase metal ceramic indirect additive manufacturing method. The method comprises the following steps that MAX phase powder and a binder are fully mixed, stirred and heated, wherein the adding amount of the binder accounts for 25-45% of the total volume of the mixed powder, and the binder is prepared from, by weight, 25-35 parts of cellulose acetate butyrate, 60-80 parts of polyethylene glycol, 1-3 parts of stearic acid, and 0.4-0.6 part of phenothiazine; the mixture is prepared into granular feed through a pelletizer, and the granular feed is processed into metalceramic wires for indirect additive manufacturing through an injection molding machine; the metal ceramic wires are loaded on a conventional plastic 3D printer, and a metal ceramic green body is printed; the metal ceramic green body is degreased, and the binder is removed; and vacuum sintering is carried out, the metal ceramic green body is solidified, and a finished product is obtained after cooling. The conventional 3D printing equipment and a printing technology are directly used in the method, ceramic products complex in shape can be prepared, and the method has the beneficial effects thatthe printing equipment cost is low and the printed product quality is good.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing of ceramic materials, and in particular relates to an indirect additive manufacturing method of MAX phase cermets. Background technique [0002] MAX phase cermet is a new type of high-performance comprehensive ceramic material. It not only has high temperature resistance, oxidation and corrosion resistance, and high strength similar to ceramics, but also has the electrical conductivity, thermal conductivity, processability, and plasticity of metal materials. More meaningful is its superiority over graphite and MoS 2 self-lubricating properties. Therefore, it is widely used in the fields of electromechanical, instrumentation, metallurgy, chemical industry, automobile, shipbuilding, petrochemical, aerospace, national defense and so on. [0003] In the field of powder metallurgy, additive manufacturing technology (also known as 3D printing), as an advanced material processing metho...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/00B22F3/10B22F3/22B33Y70/10B33Y10/00
CPCB22F3/00B22F3/1025B22F3/225B33Y70/00B33Y10/00B22F1/103B22F1/10
Inventor 苏勇君唐迎春李正平吴淑燕向晓华李培远赵海波江洁叶晓平徐鹏
Owner LISHUI UNIV
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