CN104073750A - TiC short fiber reinforced titanium-based composite material and preparation method thereof - Google Patents
TiC short fiber reinforced titanium-based composite material and preparation method thereof Download PDFInfo
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- CN104073750A CN104073750A CN201410146326.5A CN201410146326A CN104073750A CN 104073750 A CN104073750 A CN 104073750A CN 201410146326 A CN201410146326 A CN 201410146326A CN 104073750 A CN104073750 A CN 104073750A
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Abstract
The invention discloses a TiC short fiber reinforced titanium-based composite material and a preparation method thereof. The volume fraction of the TiC short fiber in the composite material is controlled to be 0.5-25%, and the content of alloy element is 0-16wt%. The preparation method comprises the following steps: weighing and uniformly mixing the following components in percentage by weight: 0.01-5.6% of C fiber or graphite fiber, 0-16% of alloy element and the balance of iron; pressing the mixed powder into a green body which is of a predetermined shape by a forming process; sintering the green body in a vacuum sintering furnace; and cooling the green body in the furnace to obtain the in-situ synthesis TiC short fiber reinforced titanium-based composite material. The method disclosed by the invention is simple and convenient and low in cost and is used for preparing the required composite material by adjusting the content, length-diameter ratio and matrix alloy composition of the TiC short fiber reinforcement.
Description
Technical field
The present invention relates to the preparation method of technical field of composite materials, be specifically related to a kind of TiC staple fibre and strengthen titanium matrix composite and preparation method thereof.
Background technology
Titanium matrix composite refers to a kind of matrix material of introducing reinforcement in titanium or titanium alloy.It combines the high strength of the ductility of matrix, toughness and reinforcement, high-modulus, thereby obtains than titanium or higher specific tenacity, specific rigidity and the high temperature resistant property of titanium alloy, is expected to be applied on superelevation velocity of sound aerospace vehicle and advanced aero engine.
For the potentiality of better performance titanium matrix composite, in metal-base composites, the size of reinforcement, distribution and form have very important impact to reinforced effects, so the selection of reinforcement is most important.The fusing point of TiC and TiB is very high, in titanium, be stablize to, and good with titanium consistency, there is not surface reaction, Poisson's ratio is close, density is also more or less the same, coefficient of thermal expansion differences is controlled at that below 50%, (thermal expansivity of titanium is 9～10.8 * 10
-6/ K), can significantly reduce the hot unrelieved stress producing in material preparation process, in addition, the Young's modulus of TiB and TiC is Ti 4～5 times, very high to raising the efficiency of material property, thereby be the comparatively desirable reinforcement of discontinuous reinforcement titanium matrix composite.Chinese patent application (application number is 200710046913.7, and publication number is CN101135016A, and open day is on March 5th, 2008) discloses a kind of Re
2o
3, TiB and TiC mix and strengthen titanium matrix composite and preparation method thereof, in this invention, reinforcement TiC can obviously improve hardness and the wear resistance of titanium matrix composite, increase rate is respectively 1%～23% and 1%～25%.
TiB is staple fibre shape, and its mechanism and enhancement mechanism is staple fibre carrying fracture.And TiC belongs to the face-centred cubic structure of NaCl type at normal temperatures, on geometry or chemical bonding, to be all full symmetric, there is not the crystal face of preferred growth, during forming core, TiC is identical in the growth velocity of symmetrical crystal face, therefore the TiC wild phase in in-situ autogenic titanium base composite material is generally spherical or waits axle shape, and size is generally several microns or ten microns of left and right.In addition, in the synthetic in-situ autogenic titanium base composite material of fusion casting, due to the constitutional supercooling in process of setting, there will be the TiC of dentrite, and in heat treatment process, have nodularization trend gradually.The people such as Luo Tao are at < < Materials Science and Engineering of Powder Metallurgy > >, 2013,18 (5): 680-686, write articles " multicomponent original position is synthesized TiC granule intensified titanium-base compound material ", this article has been introduced multicomponent and has been reacted generated in-situ TiC particle with Ti, axle shape or the axle shape such as closely such as is.The people such as inscription on pottery illuminate are at < < heat processing technique > >, 2013,42 (14): 90-92, write articles " impact of different (TiB+TiC) content on granule intensified titanium-base compound material tissue and performance ", this article has been introduced and has been utilized Ti and B
4self propagating high temperature building-up reactions between C is prepared TiB and TiC enhancing titanium matrix composite through common melting technology, and TiC reinforcement is for waiting axle shape and dendritic crystal state.And, in performance test, seldom observe the TiC particle that fracture occurs because of carrying, compare with TiC, the better effects if that TiB strengthens, this is mainly that staple fibre form due to TiB is conducive to carrying.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and defect, provide a kind of TiC staple fibre to strengthen titanium matrix composite and preparation method thereof.The present invention utilizes reacting between titanium valve (Ti) and C fiber or graphite fibre, and simple and fast, prepare TiC staple fibre cheaply and be evenly distributed, and the titanium matrix composite good with basal body interface.
The object of the invention is to be achieved through the following technical solutions:
The present invention relates to a kind of TiC staple fibre and strengthen titanium matrix composite, in described matrix material, TiC staple fibre volume fraction is controlled at 0.5%～25%, and the weight percent content of alloying element is 0%～16%.
Preferably, the alloy element that described alloying element is titanium alloy.Comprise Al, Sn, Zr, Mo, Nb, Si, C, V.
The invention still further relates to the preparation method that a kind of above-mentioned TiC staple fibre strengthens titanium matrix composite, described method comprises following rapid:
Step 1, content takes each component as following weight percent, mixes:
C fiber or graphite fibre 0.01%～5.6%,
Alloying element 0～16%,
Surplus is titanium;
Step 2, adopts manufacturing process that each component mixing is pressed into the green compact with predetermined profile;
Step 3, puts into vacuum sintering furnace by the green compact that prepare and carries out sintering;
Step 4, furnace cooling after sintering completes, obtains described TiC staple fibre and strengthens titanium matrix composite.
TiC staple fibre generates by following reaction formula in vacuum sintering process:
Ti+C＝TiC。Titanium matrix composite prepared in accordance with the present invention can be prepared into various section bars after the secondary processing such as forge hot, hot rolling, can realize near-net-shape prepare titanium matrix composite member through die forming.
Preferably, the matrix material of room-temperature applications, the critical length-to-diameter ratio of staple fibre reinforcement is 2, the staple fibre reinforcement that is less than critical length-to-diameter ratio can not be carried, reinforced effects variation, so the C fiber that the matrix material material of room-temperature applications adds or the length-to-diameter ratio of graphite fibre are greater than 3; The matrix material of high temperature application, the critical length-to-diameter ratio of staple fibre reinforcement is 4, so the C fiber that material adds or the length-to-diameter ratio of graphite fibre are greater than 5.
Preferably, in step 1, described mixing adopts V-Mixer or ball mill blending means.
Preferably, in step 1, described alloying element, comprises one or more in the alloy element of all titanium alloys such as Al, Sn, Zr, V, Mo, Nb, Si, C, and the composition of alloying element can be adjusted according to the requirement of desired properties.
Preferably, in step 2, described manufacturing process is die forming.
Preferably, in step 3, vacuum tightness corresponding to described sintering is 1 * 10
-1～1 * 10
-3between, vacuum degree deficiency material is oxidizable, pressure is 50～70MPa, and pressurization makes material fine and close, reduces defect, temperature is controlled between 1100 ℃～1500 ℃, sintering time is 1～20 hour, and sintering temperature is lower than 1100 ℃, and sintering time is less than 1 hour, add fiber to react not exclusively with titanium, affect material property.
Compared with prior art, the beneficial effect that the present invention has is: the present invention is not in the situation that changing traditional Preparation equipment and technical process, only need in raw material, add reactant, can obtain the reinforcement of needs, simple and fast, low cost are prepared titanium matrix composite.In the present invention, chosen C fiber or graphite fibre as reactant, original position is synthesized equally distributed TiC staple fibre, and can control the length of TiC staple fibre, thereby makes this matrix material have good mechanical property.
Embodiment
Below embodiments of the invention are elaborated: following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
embodiment 1
The titanium matrix composite of preparation reinforcement TiC staple fibre volumn concentration 10%, matrix is pure titanium, and volumn concentration is scaled to mass percent, according to proportioning, takes titanium valve and C fiber.C fiber intercepted length makes its length-to-diameter ratio be not less than 3.Adopt ball mill that above-mentioned materials is mixed, then die forming is pressed into the material mixing on the green compact with predetermined profile.The green compact that prepare are put into vacuum sintering furnace and carry out sintering, its vacuum tightness 1 * 10
-3between, pressure 70MPa, 1100 ℃ of temperature, sintering time is 2 hours, furnace cooling, the TiC staple fibre that both can obtain in-situ authigenic strengthens titanium matrix composite.Gained titanium matrix composite is compared with pure titanium, and grain-size reduces 25%, and room temperature strength improves 20%.
embodiment 2
Preparation reinforcement TiC staple fibre volumn concentration 0.5%, matrix alloy is the titanium matrix composite of IMI834 (Ti-5.5Al-4Sn-4Zr-0.3Mo-1Nb-0.5Si-0.06C), volumn concentration is scaled to mass percent, according to proportioning, takes titanium valve, AlMo (50%Mo), TiSn (65%Sn), AlNb (50%Nb), Zr, Al, Si and graphite fibre.Graphite fibre intercepted length makes its length-to-diameter ratio be not less than 7.Adopt ball mill that above-mentioned materials is mixed, then die forming is pressed into the material mixing on the green compact with predetermined profile.The green compact that prepare are put into vacuum sintering furnace and carry out sintering, its vacuum tightness 1 * 10
-3between, pressure 70MPa, 1250 ℃ of temperature, sintering time is 5 hours, furnace cooling, the TiC staple fibre that both can obtain in-situ authigenic strengthens IMI834 titanium matrix composite.Gained titanium matrix composite is compared with pure titanium, and grain-size reduces 5%, and room temperature strength improves 5%.
embodiment 3
Preparation reinforcement TiC staple fibre volumn concentration 25%, matrix alloy is the titanium matrix composite of TC4 (Ti-6Al-4V), and volumn concentration is scaled to mass percent, according to proportioning, takes titanium valve, AlV, Al and C fiber.C fiber intercepted length makes its length-to-diameter ratio be not less than 3.Adopt ball mill that above-mentioned materials is mixed, then compression molding is pressed into the material mixing on the green compact with predetermined profile.The green compact that prepare are put into vacuum sintering furnace and carry out sintering, its vacuum tightness 1 * 10
-3between, pressure 70MPa, 1200 ℃ of temperature, sintering time is 8 hours, furnace cooling, the TiC staple fibre that can obtain in-situ authigenic strengthens titanium matrix composite.Gained titanium matrix composite is compared with pure titanium, and grain-size reduces 30%, and room temperature strength improves 35%.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. TiC staple fibre strengthens a titanium matrix composite, it is characterized in that, in described matrix material, TiC staple fibre volume fraction is controlled at 0.5%～25%, and the weight percent content of alloying element is 0%～16%.
2. TiC staple fibre as claimed in claim 1 strengthens titanium matrix composite, it is characterized in that the alloy element that described alloying element is titanium alloy.
3. TiC staple fibre as claimed in claim 1 or 2 strengthens a preparation method for titanium matrix composite, it is characterized in that, described method comprises following rapid:
Step 1, content takes each component as following weight percent, mixes:
C fiber or graphite fibre 0.01%～5.6%,
Alloying element 0～16%,
Surplus is titanium;
Step 2, adopts manufacturing process that each component mixing is pressed into the green compact with predetermined profile;
Step 3, puts into vacuum sintering furnace by the green compact that prepare and carries out sintering;
Step 4, furnace cooling after sintering completes, obtains described TiC staple fibre and strengthens titanium matrix composite.
4. TiC staple fibre as claimed in claim 3 strengthens the preparation method of titanium matrix composite, it is characterized in that, the C fiber that the matrix material of room-temperature applications adds or the length-to-diameter ratio of graphite fibre are greater than 3, and the C fiber that the matrix material of high temperature application adds or the length-to-diameter ratio of graphite fibre are greater than 5.
5. TiC staple fibre as claimed in claim 3 strengthens the preparation method of titanium matrix composite, it is characterized in that, in step 1, described mixing adopts V-Mixer or ball mill blending means.
6. TiC staple fibre as claimed in claim 3 strengthens the preparation method of titanium matrix composite, it is characterized in that, in step 1, described alloying element is one or more in Al, Sn, Zr, V, Mo, Nb, Si, C.
7. TiC staple fibre as claimed in claim 3 strengthens the preparation method of titanium matrix composite, it is characterized in that, in step 2, described manufacturing process is die forming.
8. TiC staple fibre as claimed in claim 3 strengthens the preparation method of titanium matrix composite, it is characterized in that, in step 3, vacuum tightness corresponding to described sintering is 1 * 10
-1～1 * 10
-3between, pressure is 50～70MPa, and temperature is controlled between 1100 ℃～1500 ℃, and sintering time is 1～20 hour.
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Cited By (6)
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| CN104630663A (en) * | 2014-12-24 | 2015-05-20 | 中南大学 | Method for preparing carbon/carbon-molybdenum composite material |
| CN107916380A (en) * | 2017-11-27 | 2018-04-17 | 上海万泽精密铸造有限公司 | Fibre reinforced titanium matrix composite and preparation method thereof |
| CN109112436A (en) * | 2018-10-10 | 2019-01-01 | 北京科技大学 | A kind of method of in-situ preparation fiber reinforcement high temperature alloy composite material |
| CN110385437A (en) * | 2019-07-03 | 2019-10-29 | 西安理工大学 | A kind of preparation method of directional fiber In-sltu reinforcement titanium and its alloy bracket |
| CN112359297A (en) * | 2020-07-07 | 2021-02-12 | 南昌航空大学 | Short carbon fiber reinforced Ti2Preparation method of AlNb composite material |
| WO2022028517A1 (en) * | 2020-08-07 | 2022-02-10 | 南京航空航天大学 | Wear-resistant gradient interface complex-phase reinforced titanium alloy material and preparation method therefor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104630663A (en) * | 2014-12-24 | 2015-05-20 | 中南大学 | Method for preparing carbon/carbon-molybdenum composite material |
| CN107916380A (en) * | 2017-11-27 | 2018-04-17 | 上海万泽精密铸造有限公司 | Fibre reinforced titanium matrix composite and preparation method thereof |
| CN109112436A (en) * | 2018-10-10 | 2019-01-01 | 北京科技大学 | A kind of method of in-situ preparation fiber reinforcement high temperature alloy composite material |
| CN110385437A (en) * | 2019-07-03 | 2019-10-29 | 西安理工大学 | A kind of preparation method of directional fiber In-sltu reinforcement titanium and its alloy bracket |
| CN110385437B (en) * | 2019-07-03 | 2021-09-10 | 西安理工大学 | Preparation method of directional fiber in-situ reinforced titanium and alloy bracket thereof |
| CN112359297A (en) * | 2020-07-07 | 2021-02-12 | 南昌航空大学 | Short carbon fiber reinforced Ti2Preparation method of AlNb composite material |
| WO2022028517A1 (en) * | 2020-08-07 | 2022-02-10 | 南京航空航天大学 | Wear-resistant gradient interface complex-phase reinforced titanium alloy material and preparation method therefor |
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