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A method for manufacturing silicon carbide-based ceramic parts based on 3dp additive manufacturing technology

A technology of silicon carbide ceramics and silicon carbide ceramic powder, which is applied in processing and manufacturing, additive processing, etc., can solve the problems of poor mechanical properties, difficulty in manufacturing parts with complex structures, and low density, and achieve good high-temperature comprehensive performance , solve manufacturing difficulties, avoid the effect of manufacturing process

Active Publication Date: 2020-06-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, complex silicon carbide-based ceramic parts are generally manufactured by gel injection molding technology or hot pressing method. The silicon carbide-based ceramic parts manufactured by the former have low density and poor mechanical properties at room temperature and high temperature. The latter is difficult to achieve. Manufacture of parts with complex structures, especially those with hollow structures

Method used

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  • A method for manufacturing silicon carbide-based ceramic parts based on 3dp additive manufacturing technology
  • A method for manufacturing silicon carbide-based ceramic parts based on 3dp additive manufacturing technology
  • A method for manufacturing silicon carbide-based ceramic parts based on 3dp additive manufacturing technology

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Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation of silicon carbide ceramic powder for 3DP printing equipment;

[0032] After mixing silicon carbide powder, silicon carbide short fiber, and graphite powder with a particle size of 45 μm, 20 μm, 5 μm, and 2 μm according to the composition of the ceramic powder ratio Table 1, add about 0.2– 0.5% citric acid to trigger the solidification reaction of the adhesive. After the preparation is completed, ball mill for 30 minutes and fully mixed to become silicon carbide ceramic powder for 3DP printing equipment;

[0033] Table 1 Ceramic powder ratio

[0034]

[0035] 2. Equipped with 3DP printing ink with dual curing system;

[0036] The configuration of adhesive 1: colloidal silica (particle size is 5-100nm, the pH value of the base material in the solution should be 9-12, to stabilize the colloidal silica and prevent it from premature solidification, used in stainless steel Nickel nozzle) and triethanolamine (base material) adopt polyethylene glycol as the...

Embodiment 2

[0051] Step 1, the mass fraction of silicon carbide powder with a particle size of 45 μm, 20 μm, 5 μm, and 2 μm is mixed with silicon carbide short fibers with a mass fraction of 2% to 4% and graphite powder with a mass fraction of 8% in a ratio of 10:5:2:1 to obtain ceramic powder;

[0052]Step 2, adding citric acid with a content of about 0.2% of the powder weight to the ceramic powder to trigger the solidification reaction of the adhesive, after the preparation is completed;

[0053] Step 3: Perform dry ball milling for 30 minutes and fully mix to become silicon carbide-based ceramic powder for 3DP printing equipment;

[0054] Step 4, preparing the first adhesive, using colloidal silicon dioxide as the adhesive, distilled water as the medium, propylene glycol as the wetting agent, and triethanolamine as the base material, wherein the colloidal silicon dioxide and distilled water are in a mass ratio of 7 : 10 mixed, adding mass fraction is 5% propylene glycol, 3% triethanol...

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Abstract

The invention discloses a silicon carbide-based ceramic part manufacturing method based on a 3DP additive material manufacturing technology. The silicon carbide-based ceramic part manufactured by utilizing the 3DP additive material manufacturing technology can obtain a compact part with good high temperature comprehensive performance after a series of aftertreatment is carried out, and the problem that a part with a complex structure is difficult to manufacture is solved. A 3DP additive material technology is utilized for realizing rapid manufacturing of the silicon carbide-based ceramic part, a series of complex manufacturing technology of a manufacturing process of the complex part with a hollow structure is effectively avoided, the manufacturing time and cost are greatly reduced while guaranteeing that the comprehensive performance meets requirements, and the silicon carbide-based ceramic part manufacturing method disclosed by the invention is a new technology with revolutionary character and has a large market value.

Description

technical field [0001] The invention belongs to the field of rapid manufacturing of silicon carbide-based ceramic parts, and in particular relates to a method for manufacturing silicon carbide-based ceramic parts based on 3DP additive manufacturing technology. Background technique [0002] Silicon carbide-based ceramic materials have excellent properties such as low density, high temperature resistance, corrosion resistance, high strength, high hardness, and high wear resistance. They are ideal materials for aerospace manufacturing, but their inherent low toughness and difficulty in processing make them less Suitable for traditional processing. [0003] Additive manufacturing is an advanced manufacturing technology developed by integrating information technology, material technology, manufacturing technology and other disciplines. It manufactures solid parts through layer-by-layer accumulation of materials, which has great advantages in the near-net shape of complex parts. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/10
CPCC04B35/565C04B35/6303C04B35/632C04B35/634C04B35/638C04B35/6455B33Y40/00C04B2235/425C04B2235/6026C04B2235/614C04B2235/6562C04B2235/6567
Inventor 鲁中良连伟波李涤尘杨强徐文梁
Owner XI AN JIAOTONG UNIV
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