V2AlC block material synthesized by microwave sintering as well as preparation method and application of V2AlC block material

A technology of microwave sintering and bulk materials, which is applied in the field of microwave sintering synthesis of V2AlC bulk materials and its preparation, can solve the problems of high temperature, long synthesis time, and low purity, and achieve increased liquid phase, shortened synthesis time, and high purity Improved effect

Pending Publication Date: 2021-09-03
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention in order to solve the present V 2 The problems of high temperature, long synthesis time and low purity in the synthesis of AlC bulk materials provide a method for synthesizing high-purity V in a short time at a lower temperature. 2 The method of AlC bulk material, also discloses the V prepared by this method 2 AlC bulk material in wear-resistant material and V 2 C Precursor material application of two-dimensional materials

Method used

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  • V2AlC block material synthesized by microwave sintering as well as preparation method and application of V2AlC block material
  • V2AlC block material synthesized by microwave sintering as well as preparation method and application of V2AlC block material
  • V2AlC block material synthesized by microwave sintering as well as preparation method and application of V2AlC block material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Microwave sintering synthesis V 2 The method of AlC bulk material, comprises the following steps:

[0041] a. Weigh 2.09g vanadium powder, 0.66g aluminum powder, 0.25g graphite powder according to the molar ratio of V:Al:C=2:1.2:1, add 0.12g LaF 3 (4%) as a sintering aid, the above powder was added to 5ml of absolute ethanol, ground with a quartz mortar for 30min, and vacuum-dried at 50°C for 5h to obtain a mixed raw material;

[0042] b. Put the mixed raw materials in a steel grinding tool and press for 60s under a pressure of 240MPa to form a cylindrical green body.

[0043] c. Place the pressed green body in a microwave sintering device, heat it to 1250°C in an argon atmosphere, keep it warm for 5 minutes, and obtain V after cooling. 2 AlC bulk material.

Embodiment 2

[0045] Microwave sintering synthesis V 2 The method of AlC bulk material, comprises the following steps:

[0046] a. Weigh 2.09g vanadium powder, 0.66g aluminum powder, 0.25g graphite powder according to the molar ratio of V:Al:C=2:1.2:1, add 0.06g LaF 3 (2%) as a sintering aid, the above powder was added to 5ml of absolute ethanol, ground with a quartz mortar for 30min, and vacuum-dried at 50°C for 5h to obtain a mixed raw material;

[0047] b. Put the mixed raw materials in a steel grinding tool and press for 60s under a pressure of 240MPa to form a cylindrical green body.

[0048]c. Place the pressed green body in a microwave sintering device, heat it to 1250°C in an argon atmosphere, keep it warm for 5 minutes, and obtain V after cooling. 2 AlC bulk material.

Embodiment 3

[0050] Microwave sintering synthesis V 2 The method of AlC bulk material, comprises the following steps:

[0051] a. Weigh 2.09g vanadium powder, 0.66g aluminum powder, 0.25g graphite powder according to the molar ratio of V:Al:C=2:1.2:1, add 0.12gCeF 3 (4%) as a sintering aid, the above powder was added to 5ml of absolute ethanol, ground with a quartz mortar for 30min, and vacuum-dried at 50°C for 5h to obtain a mixed raw material;

[0052] b. Put the mixed raw materials in a steel grinding tool and press for 60s under a pressure of 240MPa to form a cylindrical green body.

[0053] c. Place the pressed green body in a microwave sintering device, heat it to 1250°C in an argon atmosphere, keep it warm for 5 minutes, and obtain V after cooling. 2 AlC bulk material.

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Abstract

The invention relates to a V2AlC block material synthesized by microwave sintering and a preparation method thereof. The method comprises the following steps: weighing vanadium powder, aluminum powder and graphite powder according to a molar ratio of V:Al:C of 2:(1.1-1.4):1; a sintering aid LaF3 or CeF3 is added; adding the powder into absolute ethyl alcohol, grinding for 30 minutes by using a quartz mortar, and carrying out vacuum drying for 5 hours at the temperature of 50 DEG C to obtain a mixed raw material; placing the mixed raw materials in a steel grinding tool to be pressed for 60 s under the pressure of 240 MPa, and forming a cylindrical blank; and putting the pressed blank into a microwave sintering device, heating the material to 1250 DEG C in an argon atmosphere, preserving heat for 5 minutes, and cooling the material to obtain the V2AlC block material.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a microwave sintering synthesis V 2 AlC bulk material and its preparation method and application. Background technique [0002] V 2 AlC is a ternary transition metal carbide, which belongs to the MAX phase. It has both the excellent properties of ceramics and metals, such as lower density (4.07g / cm ３ ), high modulus (283 GPa), good electrical conductivity (4×10 6 S m -1 ) and thermal conductivity (48W·m -1 ·K -1 ), excellent oxidation resistance (below 500 ° C), thermal shock resistance, good high pressure resistance, and superior processing performance. Therefore, V 2 AlC materials can be used as wear-resistant materials, reinforcing phase materials for metal matrix composites, heating elements, nozzles, etc. [0003] synthetic V 2 AlC methods include hot isostatic pressing, hot pressing, spark plasma sintering, etc., and dense V 2 AlC polycrystalline ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622C04B35/65
CPCC04B35/5607C04B35/622C04B35/65C04B2235/402C04B2235/404C04B2235/422C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/658C04B2235/667C04B2235/77
Inventor 苗保记曹燕格陈秋玲张永辉程巧换
Owner HENAN UNIVERSITY OF TECHNOLOGY
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