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Powder method for preparing continaous SIC fiber reinforced Ti alloy base composite material

A composite material and fiber reinforcement technology is applied in the field of preparing continuous SiC fiber reinforced Ti alloy matrix composite materials, which can solve the problem of high preparation cost and achieve the effects of avoiding fiber damage, wide application range and simple operation method.

Inactive Publication Date: 2004-09-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency of high preparation cost, the purpose of the present invention is to provide a method for preparing continuous SiC fiber reinforced Ti alloy matrix composite material, adopting the present invention can significantly reduce the cost of preparing SiC / Ti matrix composite material, while ensuring its performance , and provides a feasible technical route for the preparation of bulk materials

Method used

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  • Powder method for preparing continaous SIC fiber reinforced Ti alloy base composite material
  • Powder method for preparing continaous SIC fiber reinforced Ti alloy base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Using J801-7A / ZF winding unit and ZRY45B vacuum hot pressing furnace, the experimental process is as follows:

[0024] 1) using polystyrene as a binder and xylene as a solvent, mixing polystyrene and xylene in a weight ratio of 1:1 and fully dissolving to obtain a dissolved binder;

[0025] 2) Take Ti powder, add it into the dissolved binder according to the weight ratio of Ti: polystyrene = 6:1 and mix thoroughly, make 1mm thick flakes and dry them, and then use a hand-operated small rolling mill to divide into 7 passes First time, the thin sheet is rolled into a prefabricated strip with a thickness of 200 μm, and the prefabricated strip is cut according to the mold size for subsequent use;

[0026] 3) Wind the continuous SiC fiber onto a circular stainless steel cylinder with a winding unit, the fiber spacing is 200 μm, and then use polystyrene and xylene to coat the surface of the wire at a weight ratio of 1:1. Fixed, made into fiber cloth; then cut, ready for heat-...

Embodiment 2

[0029] The difference from Example 1 is:

[0030] Using Ti-6Al-4V powder as raw material, add this powder and polystyrene to the dissolved binder in a weight ratio of 7:1 and mix thoroughly to make a prefabricated tape with a thickness of 180 μm. Wind the continuous SiC fiber onto a circular stainless steel cylinder with a fiber spacing of 200 μm, and then use polystyrene and xylene in a 1:1.5 weight ratio to coat the surface of the wire and fix it to make a fiber cloth ;Then cut, ready for hot pressing compound;

[0031] The removal process of the binder is: degassing at 400°C for 2 hours, then raising the temperature to 530°C for 30 minutes; to 870°C, heat preservation for 15 minutes, pressurize to 10MPa first, and hold pressure for 20 minutes; then pressurize to 20MPa, hold pressure for 20 minutes; finally pressurize to 40MPa, hold pressure for 50 minutes) to obtain a plate-shaped composite material sample, The result was the same as in Example 1.

Embodiment 3

[0033] The difference from Example 1 is:

[0034] Using Ti-24Al-17Nb as raw material, this powder and polystyrene are added to the dissolved binder in a weight ratio of 5:1 and mixed thoroughly to make a prefabricated tape with a thickness of 150 μm. The continuous SiC fiber is wound onto a circular stainless steel cylinder with a fiber spacing of 180 μm, and then the surface of the wire is coated and fixed with a binder of polystyrene and xylene in a weight ratio of 0.8:1 to make a fiber cloth; Then cut it for heat-compression lamination;

[0035] The removal process of the binder is: degassing at 360°C for 2.5 hours, then raising the temperature to 480°C for 60 minutes; to 920°C, heat preservation for 15 minutes, pressurize to 5MPa first, and hold pressure for 20 minutes; then pressurize to 15MPa, hold pressure for 20 minutes; finally pressurize to 50MPa, hold pressure for 60 minutes) to obtain a plate-shaped composite material sample, The result was the same as in Example...

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Abstract

The present invention relates to composite material preparing technology, and is especially preparation process of continuous SiC fiber reinforced Ti alloy-based composite material. The prefabricated band prepared through mixing polyestyrene as adhesive, xylene as solvent and Ti alloy powder, and the fiber cloth made through continuously twisting SiC fiber are deaired, heated and hot pressed to obtain composite material plate. The present invention provides the practical technological path for preparing SiC fiber reinforced Ti alloy-based composite material in low cost, and the composite material may prepared with cheap alloy powder and polystyrene as adhesive in simple apparatus. The preparation process has no pollution, and is simple, practical and wide in application.

Description

technical field [0001] The invention relates to composite material preparation technology, in particular to a method for preparing continuous SiC fiber reinforced Ti alloy matrix composite material. Background technique [0002] With the development of aviation, aerospace and space technology, the use environment of aircraft materials is more harsh and harsh, and the resulting force, heat, chemical and physical effects are concentrated on the structural materials that make up aircraft and engines, which has great impact on Lightweight, high strength, high toughness, heat resistance, fatigue resistance, oxidation resistance and corrosion resistance of materials also put forward more stringent requirements. At present, the development of traditional high-temperature Ti alloys has almost reached its limit, but the brittleness and formability of Ti-Al intermetallic compounds limit its popularization and application. SiC continuous fiber reinforced titanium alloy matrix composit...

Claims

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Application Information

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IPC IPC(8): C22C47/14C22C47/20C22C49/11
Inventor 符跃春石南林张德志杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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