Preparation method for Ti3SnC2 ceramic powder and prepared ceramic powder

A ceramic powder and powder technology, applied in the field of ceramic powder, can solve the problems of complex process and high equipment requirements, and achieve the effects of simple process, improved purity, and reduced sintering activation energy

Inactive Publication Date: 2017-05-24
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology needs to be carried out under high temperature and high pressure conditions, which requires high equipment and complicated processes, and the product also contains a large amount of TiC and Ti 2 SnC and other impurities

Method used

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  • Preparation method for Ti3SnC2 ceramic powder and prepared ceramic powder
  • Preparation method for Ti3SnC2 ceramic powder and prepared ceramic powder
  • Preparation method for Ti3SnC2 ceramic powder and prepared ceramic powder

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preparation example Construction

[0020] A kind of Ti 3 SnC 2 The preparation method of the ceramic powder uses a mixture of Ti powder, Sn powder, Al powder and C powder as a raw material, activates the raw material by ball milling, conducts a self-propagating reaction, and then performs ball milling and pulverization.

[0021] Sn powder is used as a component in the MAX phase to form a solid solution. The addition of Al powder can fix the crystal lattice, refine the grain, replace part of Sn to form a solid solution, reduce the activation energy of sintering, make the product grain size small, high activity, easy to sinter, and excellent processing performance.

[0022] When the weight ratio of Ti powder: Sn powder: Al powder: C powder is 2.95-3.05:0.6-1:0.2-0.6:1.95-2.05, the raw materials can be fully reacted. Further, when the weight ratio of Ti powder: Sn powder: Al powder: C powder is 3: 0.6-1: 0.2-0.6: 2, the weight ratio of Ti powder: Sn powder: Al powder: C powder is better When the number ratio is...

Embodiment 1

[0035] A kind of Ti 3 SnC 2 The preparation method of ceramic powder comprises:

[0036] Weigh 30g of Ti powder with a particle size of 400 mesh, 8g of Sn powder with a particle size of 400 mesh, 4g of Al powder with a particle size of 400 mesh, and 20g of C powder with a particle size of 400 mesh as raw materials. After mixing the raw materials, place them in a vacuum ball milling tank and pass in argon gas, use cemented carbide balls as grinding balls, and ball mill at a speed of 600r / min for 3 hours according to the ball-to-material ratio of 10:1 to obtain ball milling activated powder. Place the activated ball mill powder in a graphite crucible and place a tungsten wire coil on the surface, place the graphite crucible in a self-propagating high-temperature synthesis device to evacuate and fill it with argon, and energize the tungsten wire coil to ignite the ball mill activated powder. Self-propagating reaction, block product. Put the bulk product in a ball mill jar, use...

Embodiment 2

[0038] A kind of Ti 3 SnC 2 The preparation method of ceramic powder comprises:

[0039] Weigh 30g of Ti powder with a particle size of 400 mesh, 10g of Sn powder with a particle size of 400 mesh, 2g of Al powder with a particle size of 400 mesh, and 20g of C powder with a particle size of 400 mesh as raw materials. After mixing the raw materials, place them in a vacuum ball mill tank and pass in argon gas, use cemented carbide balls as grinding balls, and ball mill at a speed of 500r / min for 3 hours according to the ball-to-material ratio of 10:1 to obtain ball-milled activated powder. Place the activated ball mill powder in a graphite crucible and place a tungsten wire coil on the surface, place the graphite crucible in a self-propagating high-temperature synthesis device to evacuate and fill it with argon, and energize the tungsten wire coil to ignite the ball mill activated powder. Self-propagating reaction, block product. Put the bulk product in a ball mill jar, use ce...

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Abstract

The invention provides a preparation method for a Ti3SnC2 ceramic powder and the prepared ceramic powder, and belongs to the field of ceramic materials. The preparation method comprises the steps: mixing raw materials evenly, and carrying out ball milling for a first time for 2.5-3.5 h at a speed of 400-800 r/min, to obtain a ball-milled activated powder; carrying out a self-propagating reaction of the ball-milled activated powder to obtain a massive product; and carrying out ball milling of the massive product for a second time for 2.5-3.5 h at a speed of 250-350 r/min. The raw materials comprise, in parts by weight, 2.95-3.05 parts of a Ti powder, 0.6-1 part of an Sn powder, 0.2-0.6 part of an Al powder and 1.95-2.05 parts of a C powder. The preparation method has the advantages of simple process, low energy consumption and rapid reaction. The ceramic powder prepared by the preparation method has the advantages of low cost, high purity, high activity, large hardness, small particle size, good electric conductivity, good thermal conductivity and the like, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of ceramic materials, and in particular to a Ti 3 SnC 2 A method for preparing ceramic powder and the prepared ceramic powder. Background technique [0002] Professor Barsoum of Drexel University in the United States proposed the concept of "MAX phase" in 2000. MAX phase is M n+ 1 AX n Abbreviation for phase (n=1,2or3). Among them, M represents a class of early transition metal elements, A represents some elements of the third or fourth main group, and X is C or N. Due to the special cubic layered structure of such MAX compounds, M 6 The X layer and A layer are arranged alternately, so that it has the excellent properties of ceramics and metals, such as low density, high melting point, good electrical and thermal conductivity, high elastic modulus, high fracture toughness, oxidation resistance, thermal shock resistance, and easy processing And has good self-lubrication. It has broad application prospects in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/626
CPCC04B35/5611C04B35/6261C04B35/6267C04B2235/40C04B2235/402C04B2235/404C04B2235/422
Inventor 许剑光姚为顾大国罗驹华
Owner YANCHENG INST OF TECH
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