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Ceramic article production method and ceramic article

A technology for ceramic products and manufacturing methods, which is applied in the direction of ceramic products, ceramic layered products, manufacturing tools, etc., and can solve the problems of crack formation, inability to obtain high-strength porous structures, and difficulty in obtaining ceramic molding products with modeling precision porous structures, etc. achieve high mechanical strength

Active Publication Date: 2021-07-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in preheating by using a heater, a part of the ceramic material powder in the portion not irradiated with laser light is melted, and the precision of the surface boundary portion of the structure is not obtained, and as a result, for example, it is difficult to conduct fine porous structures. modeling
Meanwhile, when preheating is not performed by giving priority to modeling accuracy, there is a problem that cracks are formed by rapid cooling after the treatment as described above, and a porous structure with high strength cannot be obtained
Therefore, using the above techniques, it is difficult to obtain a ceramic molded product with a porous structure that achieves both molding accuracy and mechanical strength.

Method used

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  • Ceramic article production method and ceramic article
  • Ceramic article production method and ceramic article
  • Ceramic article production method and ceramic article

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0119] In this example, a porous portion was fabricated with a grid-like pattern. The porous portion roughly corresponds to the case where the hole pitch of the grid-like pattern is 175 μm.

[0120]

[0121] prepared α-Al 2 o 3 Powder, Gd 2 o 3 Powder and Tb 2 o 3.5 Powder (Tb 4 o 7 powder), the powder is weighed so that its molar ratio is Al 2 o 3 :Gd 2 o 3 :Tb 2 o 3.5 =77.4:20.8:1.8. The weighed powders were mixed with a dry ball mill for 30 minutes to obtain mixed powders (material powders).

[0122] When the composition of the above-mentioned material powder is analyzed by ICP emission spectrometry, the content of zirconia is less than 0.1 mol%.

[0123] Next, pass the above Figure 1A to Figure 1H The steps shown are essentially the same steps to form the shaped article of Example 1.

[0124] For forming the molded article, ProX DMP 100 (product name) manufactured by 3D SYSTEMS on which a 50W Nd:YAG laser (beam diameter: 65 μm) was mounted was used.

...

example 2

[0142] This example is an example in which the content of the zirconium component in the porous portion is different.

[0143] Porous ceramics were produced under the same conditions as in Example 1 except that the immersion step (step (iii)) and the heating step (step (iv)) in the zirconium-containing component liquid were each alternately repeated twice. The produced porous ceramic product was evaluated in the same manner as in Example 1.

example 3

[0145] This example is one in which the arrangement of the openings in the porous portion is random.

[0146] A porous ceramic product was produced under the same conditions as in Example 1 except that the stretching speed was set at 220 mm / s, and the stretching pitch was set at 125 μm, to obtain a porous portion with randomly arranged open cells. The optical microscopic image of the porous part as Figure 4B shown. The produced porous ceramic product was evaluated in the same manner as in Example 1.

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Abstract

Provided are: a method for producing a ceramic article having a porous part and realizing improvement in mechanical strength of a molded article while obtaining high molding accuracy; and a ceramic article. This production method comprises: (i) a step for forming a powder layer by evenly spreading a powder of metal oxide that contains aluminum oxide as the main component; (ii) a step for melting and solidifying or for sintering the powder by irradiating the powder layer with an energy beam on the basis of shaping data; (iii) a step for causing a liquid that contains a zirconium component to be absorbed by a molded article having a porous part and being formed by repeating steps (i) and (ii); and (iv) a step for heating the molded article that has absorbed the liquid containing the zirconium component, wherein in the absorption step, the liquid is absorbed such that the proportion of the zirconium component among metal components contained in the porous part becomes 0.3-2.0 mol%.

Description

technical field [0001] The present invention relates to a method for manufacturing a ceramic shaped product, and more particularly, to a method for manufacturing a ceramic three-dimensional shaped product with a porous structure. Background technique [0002] In recent years, in the application of prototyping in a short time or making a small number of components, a method of manufacturing a three-dimensional shaped article of a direct modeling system, which obtains a desired shaped article by combining material powder with an energy beam, has been widely used , especially three-dimensional modeling products. The advantage of the three-dimensionally shaped article obtained by the direct molding system is that a high shaping accuracy is obtained since the three-dimensionally shaped article does not shrink significantly during the subsequent heat treatment. Here, molding accuracy in the present invention refers to the difference (rate of change) between the size of a ceramic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/30B28B11/04C04B38/00B33Y10/00B33Y80/00C04B35/119
CPCB28B1/001B33Y10/00B33Y80/00C04B2235/3217C04B2235/3224C04B2235/3244C04B2235/6026C04B2235/665C04B35/653C04B2235/616C04B35/119C04B35/44C04B2235/764B32B18/00C04B2237/704C04B2235/441C04B2237/343C04B38/0058C04B2111/00181C04B2111/00793C04B2111/0081B33Y70/00Y02P10/25C04B38/0054C04B38/0074C04B35/109C04B35/64C04B35/6303C04B38/0061C04B38/0038C04B2235/667
Inventor 大桥良太安居伸浩斋藤宏大志万香菜子
Owner CANON KK
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