Preparation method of SiC continuous fiber reinforced titanium-based composite, and product

A titanium-based composite material and continuous fiber technology, which is applied in the field of preparation of SiC continuous fiber reinforced titanium-based composite materials, can solve the problems of low braiding and limited reinforcement effect, and achieve strong braiding, improved mechanical properties at room temperature, Enhance the effect of good effect

Inactive Publication Date: 2018-03-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents all use relatively thick SiC fibers with a diameter between 50-150um. Due to their large diameters, their weavability is low. The reinforcement method for Ti composite materials is mainly unidirectional reinforcement, and the reinforcement effect is limited.

Method used

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  • Preparation method of SiC continuous fiber reinforced titanium-based composite, and product
  • Preparation method of SiC continuous fiber reinforced titanium-based composite, and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The SiC continuous fiber with an average diameter of 10um is placed in an air environment and heat-treated at 500°C, and then the heat-treated continuous SiC fiber is used as the base material. 2 O 3 It is the target material for magnetron sputtering. The process parameters of magnetron sputtering are: working temperature 270℃, sputtering gas is O 2 , Ar mixed gas, oxygen-argon ratio is 0.4, working pressure is 0.7Pa, Al 2 O 3 The target sputtering power is 1500W, and the deposition time is 60min; after the magnetron sputtering, Al is obtained 2 O 3 The average coating thickness is 300nm, the fiber volume fraction is 40% containing Al 2 O 3 Coated SiC continuous fiber. figure 1 Is the micro-topography of SiC continuous fiber, which is represented by figure 1 It can be seen that the surface of the SiC continuous fiber is smooth, and the average fiber diameter is 10um. figure 2 To contain Al 2 O 3 Coated SiC continuous fiber, as can be seen from the figure, there is an obvio...

Embodiment 2

[0035] The SiC continuous fiber with an average diameter of 12um was placed in an air environment and heat-treated at 400°C. Then the heat-treated continuous SiC fiber was used as the base material. 2 O 3 It is a target material for magnetron sputtering. The process parameters of magnetron sputtering are: working temperature 100℃, sputtering gas is O 2 , Ar mixed gas, oxygen-argon ratio is 1.0, working pressure is 0.1Pa, Al 2 O 3 The target sputtering power is 100W, and the deposition time is 10min; after the magnetron sputtering is over, Al 2 O 3 The average coating thickness is 100nm, the fiber volume fraction is 30% containing Al 2 O 3 Coated SiC continuous fiber.

[0036] Will Al 2 O 3 The coated SiC continuous fiber is put into the mold, and then the TC4 matrix alloy is put into the crucible and smelted in the resistance furnace. After reaching the impregnation temperature of 2000 ℃, the heating device 2 O 3 The coated SiC continuous fiber preform is heated, and the control sys...

Embodiment 3

[0038] The SiC continuous fiber with an average diameter of 15um is placed in an air environment and heat-treated at 700°C, and then the heat-treated continuous SiC fiber is used as the base material. 2 O 3 It is the target material for magnetron sputtering. The process parameters of magnetron sputtering are: working temperature 500℃, sputtering gas is O 2 , Ar mixed gas, oxygen-argon ratio is 0.1, working pressure is 1.0Pa, Al 2 O 3 The target sputtering power is 5000W, and the deposition time is 200min; after the magnetron sputtering is over, Al is obtained 2 O 3 The average coating thickness is 2000nm, the fiber volume fraction is 60% containing Al 2 O 3 Coated SiC continuous fiber.

[0039] Will Al 2 O 3 The coated SiC continuous fiber is put into the mold, then the TC4 matrix alloy is put into the crucible and smelted in the resistance furnace. After reaching the infiltration temperature of 1900℃, the heating device 2 O 3 The coated SiC continuous fiber preform is heated, and t...

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Abstract

The invention discloses a preparation method of a SiC continuous fiber reinforced titanium-based composite, and a product. The preparation method comprises the following steps that a SiC continuous fiber with the diameter being 10-15 [mu]m is placed in the air environment to be subjected to heat treatment, then, with the SiC continuous fiber as a base material, Al2O3 is sputtered on the surface ofthe SiC continuous fiber through magnetron sputtering, and thus the SiC continuous fiber covered with an Al2O3 coating is obtained; a titanium or titanium alloy base body is heated to be melted, andthus a melted titanium or titanium alloy solution is obtained; the SiC continuous fiber covered with the Al2O3 coating is placed in a mould, preheating is conducted, and the mould is vacuumized; and the melted titanium or titanium alloy solution is pressed into the mould, heat preservation and cooling are conducted, and thus the SiC continuous fiber reinforced titanium-based composite is obtained.The filament SiC continuous fiber is adopted as the reinforcing base material, and the magnetron sputtering technology and a vacuum pressure impregnation method are combined, so that the prepared SiCcontinuous fiber reinforced titanium-based composite has the advantages that the structure is compact, the mechanical property is high, the interface stable property is good, and the service life islong.

Description

Technical field [0001] The invention belongs to the technical field of titanium-based composite material preparation, and specifically relates to a preparation method and product of a SiC continuous fiber reinforced titanium-based composite material. Background technique [0002] Titanium-based composite materials (TMCs) are a type of composite material with titanium alloy as the matrix and dispersion reinforcement. It has high specific strength, high specific modulus, heat resistance, wear resistance, fatigue resistance, and good dimensional stability. Excellent performance, it is an ideal structural material for aerospace technology and daily industrial applications. SiC fiber exhibits excellent comprehensive properties in terms of high temperature resistance, oxidation resistance, creep resistance, tensile strength and compatibility with the titanium matrix. It is an ideal material for strengthening the titanium matrix. Compared with titanium alloys, SiC fiber-reinforced tita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C49/11C22C49/14C22C47/04C22C47/08C22C101/14C22C121/02
Inventor 岳建岭朱文华黄小忠杜作娟
Owner CENT SOUTH UNIV
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