Preparation method of high-performance high-temperature titanium-alloy-based composite material

A high-temperature titanium alloy and composite material technology, which is applied in the field of preparation of high-performance high-temperature titanium alloy-based composite materials, can solve problems that have not yet been discovered, and achieve the effect of increasing hardness

Active Publication Date: 2020-01-31
JIANGSU UNIV
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Problems solved by technology

So far, no process route has been found for preparing titanium matrix composites by spark plasma sintering using SiC and high temperature resistant titanium alloys as raw materials

Method used

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  • Preparation method of high-performance high-temperature titanium-alloy-based composite material
  • Preparation method of high-performance high-temperature titanium-alloy-based composite material
  • Preparation method of high-performance high-temperature titanium-alloy-based composite material

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Embodiment 1

[0029] Such as Figure 1-6 shown.

[0030] A preparation method (SPS method) of a high-performance high-temperature titanium alloy-based composite material, using 93 vol % titanium matrix and 7vol.% SiCp as raw materials (the titanium matrix is ​​made of 90wt.% Ti alloy powder Ti-6.01Al-2.55Sn -6.24Zr-1.23Nb-1.84Mo-0.19Si and 10wt.% pure Ti powder) generate TiC and Ti in situ by spark plasma sintering 5 Si 3 Reinforcement phase, which can improve the comprehensive performance of composite materials. Specific steps include:

[0031] (1) Prepare 90wt.% Ti alloy powder and 10wt.% pure Ti powder by atomization method to obtain matrix powder;

[0032] (2) Wet mill 7vol.% SiCp reinforcement powder; the particle size of the 7vol.% SiCp reinforcement used is 1 μm, the purity is greater than 99%, the ball mill speed is 300±50r / min, and the wet milling time is 24h;

[0033] (3) Wet grinding matrix powder and reinforcement mixed powder; ball mill speed 300±50r / min, wet grinding time...

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Abstract

The invention relates to a preparation method of a high-performance high-temperature titanium-alloy-based composite material. The method is characterized in that the titanium-alloy-based composite material is prepared taking 90 wt.% of Ti alloy powder as a matrix, and 7 vol.% of SiCP reinforcing body powder is subjected to discharge plasma sintering in-situ reaction so as to generate TiC and Ti5Si3 reinforced phase. The preparing method comprises the following steps of 1, preparing powder by using an atomization method; 2, carrying out wet grinding on the 7 vol.% of SiCP reinforcing body powder; 3, carrying out wet grinding on the mixing powder including the matrix and the reinforcing body powder; 4, carrying out drying in a vacuum drying box; 5, carrying out dry grinding; 6, screening for200 meshes; 7, performing discharge plasma sintering under a sintering temperature of 1350 DEG C and a sintering pressure of 50 MPa; and 8, carrying out solid solution aging. According to the method,the microhardness of the composite material is 724.56 HV, the oxidation weight of the composite material is 1.7305 mg.cm<-2>, and the thickness of a composite oxide film is about 16 microns after high-temperature oxidation for 100 hours at 750 DEG C.

Description

technical field [0001] The invention relates to a preparation technology of titanium-based composite materials, especially a kind of TiC and Ti 5 Si 3 Reinforced titanium-based composite materials, specifically, use a SiC and high-temperature-resistant titanium alloy as raw materials, and use spark plasma sintering (SPS) as the original reaction to generate TiC and Ti 5 Si 3 A method for preparing a high-performance high-temperature titanium alloy-based composite material with equal reinforcement phases. Background technique [0002] High-temperature titanium alloys have the advantages of low density, high specific strength, and high-temperature resistance. They have broad application backgrounds in aerospace, weaponry and other fields. Titanium-based composites prepared with existing high-temperature titanium alloys have high-temperature resistance that cannot be achieved at most. up to 750°C. Compared with titanium alloys, titanium-based composites based on high-temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/10C22C1/05C22C32/00C22F1/18
CPCC22C1/0458C22C1/058C22C14/00C22C32/0047C22F1/183
Inventor 许晓静陈浩蔡成彬刘庆军张旭刘阳光肖易水蒋泽毛强张天赐
Owner JIANGSU UNIV
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