CN104073750B - TiC short fiber reinforced titanium matrix composite and preparation method thereof - Google Patents
TiC short fiber reinforced titanium matrix composite and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of TiC short fiber reinforced titanium matrix composite and preparation method thereof; In described matrix material, TiC staple fibre volume fraction controls 0.5% ~ 25%, and the weight percent content of alloying element is 0% ~ 16%.Content takes each component as following weight percent, mixes: fiber C or graphite fibre 0.01% ~ 5.6%, alloying element 0 ~ 16%, surplus are titanium; Adopt manufacturing process mixed powder to be pressed into the green compact with predetermined profile, green compact are put into vacuum sintering furnace and sinters, namely furnace cooling obtains endogenous TiC short fiber reinforced titanium matrix composite.The present invention is simple and direct, cost is low, and by the matrix material needed for adjustment TiC short fiber reinforced body burden, major diameter when matrix alloy composition preparation.
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 short fiber reinforced titanium matrix composite and preparation method thereof.
Background technology
Titanium matrix composite refers to a kind of matrix material introducing reinforcement in titanium or titanium alloy.It combines the high strength of the ductility of matrix, toughness and reinforcement, high-modulus, thus 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.
In order to better play the potentiality of titanium matrix composite, in metal-base composites, the size of reinforcement, distribution and form have very important impact to reinforced effects, and therefore 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, surface reaction does not occur, Poisson's ratio is close, and density is also more or less the same, and coefficient of thermal expansion differences controls below 50% that (thermal expansivity of titanium is 9 ~ 10.8 × 10
-6/ K), can significantly reduce the thermal residual strain produced in material preparation process, in addition, the Young's modulus of TiB and TiC is 4 ~ 5 times of Ti, very high to raising the efficiency of material property, is thus the ideal reinforcement of discontinuous reinforcement titanium matrix composite.Chinese patent application (application number is 200710046913.7, and publication number is CN101135016A, and publication date is on March 5th, 2008) discloses a kind of Re
2o
3, TiB and TiC hybrid buildup titanium matrix composite and preparation method thereof, in this invention, reinforcement TiC obviously can improve hardness and the wear resistance of titanium matrix composite, and 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, that geometry or chemical bonding 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 be generally spherical or etc. shaft-like, size is generally several micron or ten microns.In addition, due to the constitutional supercooling in process of setting in the in-situ autogenic titanium base composite material of fusion casting synthesis, 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 in-situ synthesizing TiC granule intensified titanium-base compound material ", this article describes multicomponent and Ti reacts generated in-situ TiC particle, shaft-like or the shaft-like such as near such as is.The people such as inscription on pottery illuminate at " heat processing technique ", 2013,42 (14): 90-92, write articles " different (TiB+TiC) content on the impact of granule intensified titanium-base compound material structure and properties ", this article describes and utilizes Ti and B
4sHS process reaction between C is prepared TiB and TiC through common melting technology and is strengthened titanium matrix composite, and TiC reinforcement such as is at shaft-like and the dendritic crystal state.Further, seldom observe the TiC particle occurring because of carrying to rupture in performance test, compared with TiC, the better effects if that TiB strengthens, this is mainly because the staple fibre form of 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, a kind of TiC short fiber reinforced titanium matrix composite and preparation method thereof is provided.The present invention utilizes the reaction between titanium valve (Ti) and fiber C or graphite fibre, and the TiC staple fibre of preparing of simple and fast, low cost is 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 short fiber reinforced titanium matrix composite, in described matrix material, TiC staple fibre volume fraction controls 0.5% ~ 25%, and the weight percent content of alloying element is 0% ~ 16%.
Preferably, described alloying element is the alloy element of titanium alloy.Comprise Al, Sn, Zr, Mo, Nb, Si, C, V.
The invention still further relates to a kind of preparation method of above-mentioned TiC short fiber reinforced titanium matrix composite, described method comprises following rapid:
Step one, content takes each component as following weight percent, mixes:
Fiber C or graphite fibre 0.01% ~ 5.6%,
Alloying element 0 ~ 16%,
Surplus is titanium;
Step 2, adopts manufacturing process that each component mixed is pressed into the green compact with predetermined profile;
The green compact prepared are put into vacuum sintering furnace and are sintered by step 3;
Step 4, has sintered rear furnace cooling, obtains described TiC short fiber reinforced 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 bar after the secondary processing such as forge hot, hot rolling, can realize near-net-shape prepare titanium matrix composite component through die forming.
Preferably, the matrix material of room-temperature applications, the critical aspect ratio of short fiber reinforced body is 2, the short fiber reinforced body being less than critical aspect ratio can not carry, reinforced effects is deteriorated, so the length-to-diameter ratio of the fiber C that the matrix material material of room-temperature applications adds or graphite fibre is greater than 3; The matrix material of high temperature application, the critical aspect ratio of short fiber reinforced body is 4, so the length-to-diameter ratio of the fiber C that material adds or graphite fibre is greater than 5.
Preferably, in step one, described mixing adopts V-Mixer or ball mill blending means.
Preferably, in step one, 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 adjust according to the requirement of desired properties.
Preferably, in step 2, described manufacturing process is die forming.
Preferably, in step 3, the vacuum tightness of described sintering correspondence 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 controls between 1100 DEG C ~ 1500 DEG C, sintering time is 1 ~ 20 hour, and sintering temperature is lower than 1100 DEG C, and sintering time is less than 1 hour, add fiber and titanium reacts not exclusively, affect material property.
Compared with prior art, the beneficial effect that the present invention has is: the present invention is not when changing traditional Preparation equipment and technical process, only need add reactant in the feed, can obtain the reinforcement needed, simple and fast, low cost prepare titanium matrix composite.Fiber C or graphite fibre is have chosen as reactant, the equally distributed TiC staple fibre of fabricated in situ in the present invention, and can the length of control TiC staple fibre, thus make this matrix material have excellent mechanical property.
Embodiment
Below embodiments of the invention are elaborated: following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.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 mass percent, takes titanium valve and fiber C according to proportioning.Fiber C intercepted length makes its length-to-diameter ratio be not less than 3.Adopt ball mill to be mixed by above-mentioned materials, then the material mixed is pressed into the green compact with predetermined profile by die forming.The green compact prepared are put into vacuum sintering furnace sinter, its vacuum tightness 1 × 10
-3between, pressure 70MPa, temperature 1100 DEG C, sintering time is 2 hours, furnace cooling, both can obtain the TiC short fiber reinforced titanium matrix composite of in-situ authigenic.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 mass percent, takes titanium valve, AlMo (50%Mo), TiSn (65%Sn), AlNb (50%Nb), Zr, Al, Si and graphite fibre according to proportioning.Graphite fibre intercepted length makes its length-to-diameter ratio be not less than 7.Adopt ball mill to be mixed by above-mentioned materials, then the material mixed is pressed into the green compact with predetermined profile by die forming.The green compact prepared are put into vacuum sintering furnace sinter, its vacuum tightness 1 × 10
-3between, pressure 70MPa, temperature 1250 DEG C, sintering time is 5 hours, furnace cooling, both can obtain the TiC short fiber reinforced IMI834 titanium matrix composite of in-situ authigenic.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 mass percent, takes titanium valve, AlV, Al and fiber C according to proportioning.Fiber C intercepted length makes its length-to-diameter ratio be not less than 3.Adopt ball mill to be mixed by above-mentioned materials, then the material mixed is pressed into the green compact with predetermined profile by compression molding.The green compact prepared are put into vacuum sintering furnace sinter, its vacuum tightness 1 × 10
-3between, pressure 70MPa, temperature 1200 DEG C, sintering time is 8 hours, furnace cooling, can obtain the TiC short fiber reinforced titanium matrix composite of in-situ authigenic.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 is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (4)
1. a preparation method for TiC short fiber reinforced titanium matrix composite, is characterized in that, in described matrix material, TiC staple fibre volume fraction controls 0.5% ~ 25%, and the weight percent content of alloying element is 0% ~ 16%; Described method comprises following rapid:
Step one, content takes each component as following weight percent, mixes:
Fiber C or graphite fibre 0.01% ~ 5.6%,
Alloying element 0 ~ 16%,
Surplus is titanium;
Step 2, adopts manufacturing process that each component mixed is pressed into the green compact with predetermined profile;
The green compact prepared are put into vacuum sintering furnace and are sintered by step 3;
Step 4, has sintered rear furnace cooling, obtains described TiC short fiber reinforced titanium matrix composite;
In step one, described alloying element is one or more in Al, Sn, Zr, V, Mo, Nb, Si, C;
In step 3, the vacuum tightness of described sintering correspondence is 1 × 10
-1~ 1 × 10
-3between, pressure is 50 ~ 70MPa, and temperature controls between 1100 DEG C ~ 1500 DEG C, and sintering time is 1 ~ 20 hour.
2. the preparation method of TiC short fiber reinforced titanium matrix composite as claimed in claim 1, it is characterized in that, the length-to-diameter ratio of the fiber C that the matrix material of room-temperature applications adds or graphite fibre is greater than 3, and the length-to-diameter ratio of the fiber C that the matrix material of high temperature application adds or graphite fibre is greater than 5.
3. the preparation method of TiC short fiber reinforced titanium matrix composite as claimed in claim 1, is characterized in that, in step one, described mixing adopts V-Mixer or ball mill blending means.
4. the preparation method of TiC short fiber reinforced titanium matrix composite as claimed in claim 1, it is characterized in that, in step 2, described manufacturing process is die forming.
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| CN104630663B (en) * | 2014-12-24 | 2016-11-23 | 中南大学 | A kind of preparation method of 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 |
| CN109112436B (en) * | 2018-10-10 | 2020-07-31 | 北京科技大学 | Method for in-situ generation of fiber-reinforced high-temperature alloy composite material |
| 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 |
| CN112030037B (en) * | 2020-08-07 | 2021-08-06 | 南京航空航天大学 | Wear-resistant gradient interface complex-phase reinforced titanium alloy material and preparation method thereof |
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| WO2008034042A2 (en) * | 2006-09-14 | 2008-03-20 | Iap Research, Inc. | Micron size powders having nano size reinforcement |
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| CN1532301A (en) * | 2003-03-19 | 2004-09-29 | 中国科学院金属研究所 | Powder method for preparing continaous SIC fiber reinforced Ti alloy base composite material |
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| CN101052737A (en) * | 2005-09-07 | 2007-10-10 | E&F株式会社 | Titanium alloy composite material, method of producing the titanium alloy composite material, titanium clad material using the titanium alloy composite material, and method of producing the titanium c |
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