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Max-phase oriented ceramic and production method therefor

A manufacturing method and orientation technology, applied in the field of MAX phase ceramics and its manufacturing

Inactive Publication Date: 2014-09-10
NAT INST FOR MATERIALS SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Method used

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  • Max-phase oriented ceramic and production method therefor
  • Max-phase oriented ceramic and production method therefor
  • Max-phase oriented ceramic and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0064] Experiment 1

[0065] 17.6g of Nb 4 AlC 3 Ceramic powder is dispersed into the water of 10mL together with the polyethyleneimine dispersant of 2% by weight relative to powder body weight, makes ternary compound Nb 4 AlC 3 Orient and sinter in a strong magnetic field of 12T to produce a dense cylindrical sample with a laminated structure of ceramic layered particles. And, the details are as follows.

[0066] Nb 4 AlC 3 As the ceramic powder, a material obtained by sintering and pulverizing Nb, Al, and C powders in an appropriate relative molar ratio corresponding to the chemical equivalents by spark plasma sintering was used. Nb 4 AlC 3 The average particle size of 0.91μm, Nb 4 AlC 3 The surface area of ​​the ceramic powder is 10.18m 2 / g.

[0067]The suspension obtained by the above-mentioned dispersion treatment is injected into a mold of gypsum or porous alumina. Then, the mold filled with the suspension is placed in a strong magnetic field. After drying...

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Abstract

The subject of the present invention is to make an extremely hard and tough alignment material from the MAX phase compound, and maintain the expected properties of the MAX phase material. The oriented ceramics of the present invention is characterized in that, in the oriented ceramics containing the Mn+1AXn phase as a ternary compound, there is a layer similar to conch nacre formed by laminating layers with a thickness on the order of nanometers to millimeters -like fine structure, which is a block-like orientation body with an overall thickness of at least millimeters or more, wherein, M represents an early transition metal, A represents a group A element, X represents C or N, and n is an integer of 1-3.

Description

technical field [0001] The present invention relates to fully oriented (texture) MAX phase, or MAX phase ceramics with sufficient orientation, and a method for producing the same. Background technique [0002] M as a ternary compound n+1 AX n (wherein, M is a transition metal, A is a group A element (in most cases, group IIIA or group IVA, including Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, P, As, S, and n=1 to 3)) The compound is also called a MAX phase, which has a crystallized multilayer microstructure of the hexagonal system. m 2 AX, M 3 AX 2 , M 4 AX 3 In the phase crystal structure, every 3rd, 4th, and 5th layer is a layer of group A elements. Lamellar ceramics containing these MAX phases exhibit high strength, high Young's modulus, good electrical and thermal conductivity and easy machinability, excellent damage resistance and thermal shock resistance such a combination of metal and Characteristics of ceramics (refer to Patent Documents 1-5). So far, more than 50 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/64
CPCC04B35/6262C04B2235/6562C04B35/6264C04B2235/3843C04B35/58007C04B2235/78C04B2235/5409C04B2235/605C04B2235/80C04B2235/5445C04B35/6455C04B35/5611C04B35/5618C04B2235/666C04B35/58014C04B35/5603C04B2235/6027C04B2235/3839C04B2235/6581C04B35/6263C04B35/63444C04B2235/6567C04B35/5615Y10T428/2495C04B35/5607C04B2235/77C04B2235/604C04B2235/96C04B35/63424
Inventor 胡春峰索尔沃托瑞·格拉索目义雄田中英彦铃木达
Owner NAT INST FOR MATERIALS SCI