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Niobium aluminum carbide-based niobium carbide-aluminum nitride composite powder and preparation method thereof

A composite powder and powder technology, which is applied in the direction of carbon compounds, nitrogen compounds, chemical instruments and methods, etc., can solve the problems of uneven distribution of TiC/NbC and easy cracks, and achieve uniform particle distribution, short production cycle, The effect of high purity

Active Publication Date: 2019-10-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TiC / NbC coatings prepared by this technology are unevenly distributed and prone to cracks

Method used

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  • Niobium aluminum carbide-based niobium carbide-aluminum nitride composite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A Nb-based 2 NbC-AlN composite powder of AlC and its preparation method. The preparation method described in this embodiment is:

[0023] Will Nb 2 AlC powder is placed in a graphite crucible, and then the graphite crucible is put into an atmosphere furnace; under a nitrogen atmosphere, the temperature of the graphite crucible is raised to 1200-1300°C at a heating rate of 1-2°C / min, and the temperature is kept 1~1.5h, naturally cooled to room temperature, prepared based on Nb 2 NbC-AlN composite powder of AlC.

Embodiment 2

[0025] A Nb-based 2 NbC-AlN composite powder of AlC and its preparation method. The preparation method described in this embodiment is:

[0026] Will Nb 2 AlC powder is placed in a graphite crucible, and then the graphite crucible is placed in an atmosphere furnace; under a nitrogen atmosphere, the temperature of the graphite crucible is raised to 1300-1400 °C at a heating rate of 2-3 °C / min, and the temperature is kept 1.5 ~ 2h, naturally cooled to room temperature, prepared based on Nb 2 NbC-AlN composite powder of AlC.

Embodiment 3

[0028] A Nb-based 2 NbC-AlN composite powder of AlC and its preparation method. The preparation method described in this embodiment is:

[0029] Will Nb 2 AlC powder is placed in a graphite crucible, and then the graphite crucible is placed in an atmosphere furnace; under a nitrogen atmosphere, the temperature of the graphite crucible is raised to 1400-1500 °C at a heating rate of 3-4 °C / min, and the temperature is kept 2~2.5h, naturally cooled to room temperature, prepared based on Nb 2 NbC-AlN composite powder of AlC.

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Abstract

The invention relates to a Nb2AlC-based NbC-AlN composite powder and a preparation method thereof. The preparation method comprises the following steps: adding Nb2AlC powder into a graphite crucible,and placing the graphite crucible in an atmosphere furnace; heating the graphite crucible to 1200-1600 DEG C in a nitrogen atmosphere at a heating rate of 1-5 DEG C / min, keeping the temperature for 1-3 h, and naturally cooled the graphite crucible to room temperature to prepare the Nb2AlC-based NbC-AlN composite powder. The method has the characteristics of short production cycle, simple process and low cost; and the Nb2AlC-based NbC-AlN composite powder prepared by the method has the advantages of high purity and uniform particle distribution.

Description

technical field [0001] The invention belongs to the technical field of NbC-AlN composite powder. Specifically related to a Nb-based 2 NbC-AlN composite powder of AlC and its preparation method. Background technique [0002] Niobium carbide (NbC) is a metal carbide with high hardness (greater than 235GPa), high toughness, high Young's modulus, high melting point (about 3610°C) and good corrosion resistance. It can be used as a composite ceramic and hard Additives in alloys, raw materials in turbine rotors and coatings for cutting and milling tools. Aluminum nitride (AlN) is widely used in electronics, machinery and composite materials due to its high thermal conductivity, high resistivity, low dielectric constant, low dielectric loss, excellent mechanical properties, non-toxicity, high temperature resistance and corrosion resistance. The field has a wide range of applications. [0003] At present, the methods for preparing composite materials containing NbC phase are: E.M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/914C01B21/072
CPCC01B32/914C01B21/072C01P2004/80
Inventor 余超谢哲邓承继丁军祝洪喜
Owner WUHAN UNIV OF SCI & TECH