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Multiphase particle enhanced powder metallurgical titanium-based composite material and preparation method thereof

A titanium-based composite material and particle-reinforced technology, which is applied in the field of powder metallurgy titanium-based composite materials, can solve problems such as poor comprehensive performance, limited application, and single performance of composite materials, and achieve improved density, excellent comprehensive performance, and excellent comprehensive performance. Effect

Inactive Publication Date: 2011-06-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite material uses a single TiB particle reinforcement, so the performance of the obtained composite material is single, and the comprehensive performance is poor, which limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] prepared as heterogeneous particle-reinforced (TiB 2 +TiC+Ti 3 SiC 2 ) / Ti composite material, the raw material adopts titanium powder, boron carbide powder and silicon carbide powder, according to weight percentage Ti:B 4 C:SiC=98:1:1 Weigh the raw material powder. The raw material powder is ball milled and mixed evenly on a ball mill, and then molded into a green body under a pressure of 300MPa, and the green body is put into a vacuum hot-pressing sintering furnace for high-temperature sintering, and the vacuum degree is controlled at 1×10 -1 MPa, the sintering temperature is 1350°C, the sintering time is 8h, and the applied pressure is 5MPa. The obtained multi-phase particle-reinforced powder metallurgy titanium-based composite material has an anti-compressive strength of 1950 MPa, and the density of the sintered body obtained by the drainage method test is 98.5%.

Embodiment 2

[0029] prepared as heterogeneous particle-reinforced (TiB 2 +TiC+Ti 5 Si 3 ) / Ti composite material, the raw material adopts titanium powder, boron carbide powder and silicon carbide powder, according to weight percentage Ti:B 4 C:SiC=89:10:1 Weigh the raw material powder. The raw material powder is ball milled and mixed evenly on a ball mill, and then molded into a green body under a pressure of 450MPa, and the green body is put into a vacuum hot-pressing sintering furnace for high-temperature sintering, and the vacuum degree is controlled at 1×10 -2 MPa, the sintering temperature is 1450°C, the sintering time is 2h, and the applied pressure is 15MPa. The obtained multi-phase particle-reinforced powder metallurgy titanium-based composite material has an anti-compressive strength of 1820 MPa, and the density of the sintered body obtained by the drainage method test is 99.3%.

Embodiment 3

[0031] prepared as heterogeneous particle-reinforced (TiB 2 +TiC+Ti 3 SiC 2 +Ti 5 Si 3 ) / Ti composite material, the raw material adopts titanium powder, boron carbide powder and silicon carbide powder, according to weight percentage Ti:B 4 C:SiC=89:1:10 Weigh the raw material powder. The raw material powder is ball milled and mixed evenly on a ball mill, and then molded into a green body under a pressure of 600MPa, and the green body is put into a vacuum hot-pressing sintering furnace for high-temperature sintering, and the vacuum degree is controlled at 1×10 -3 MPa, the sintering temperature is 1650, the sintering time is 8h, and the applied pressure is 15MPa. The obtained multi-phase particle-reinforced powder metallurgy titanium-based composite material has an anti-compressive strength of 2010 MPa, and the density of the sintered body obtained by the drainage method is 99.7%.

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Abstract

The invention discloses a multiphase particle enhanced powder metallurgical titanium-based composite material and a preparation method thereof. The material comprises three or more of titanium boride, titanium carbide, titanium silicide and titanium silicon carbide. The method comprises the following steps of: weighing titanium powder, boron carbide powder, silicon carbide powder and alloying element powder with certain granularity according to the weight percent ratio of components; uniformly mixing the powder by a mixing method; pressing into a blank with a certain shape by a compression molding process; putting the blank into a vacuum hot-pressing sintering furnace for sintering; and cooling with the furnace to obtain in-situ synthesized multiphase particle enhanced powder metallurgical titanium-based composite material. The process is simple, the boron carbide powder and the silicon carbide powder in different ratios are added during mixing, and the multiphase particle dispersion enhanced titanium-based composite material which comprises the titanium boride, the titanium carbide, the titanium silicide, the titanium silicon carbide and the like is generated through in-situ reaction. The material meets the requirements of aerospace, an advanced weapon system, an automobile engine and the like on high specific strength, high specific rigidity, wear resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a powder metallurgy titanium-based composite material, in particular to a powder metallurgy titanium-based composite material reinforced by multiphase particles, and also relates to a preparation method of the material. Background technique [0002] Due to its high specific strength, specific modulus and high wear resistance, particle-reinforced titanium-based composites are widely used in aerospace, advanced weapon systems, and automotive engines. However, due to the high strength and high deformation resistance of the composite material, it is difficult to process, thus limiting the application of particle reinforced titanium matrix composites. [0003] Powder metallurgy technology is a near-forming technology, which avoids the problems of microstructure, component segregation, and coarse grains in the production process of melting casting method, and the particle size and volume fraction of the particle-reinforced phase can ...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C14/00
Inventor 肖代红袁铁锤欧小琴王薪
Owner CENT SOUTH UNIV
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