CN107488819A - A kind of preparation method of carbon fiber reinforced aluminum matrix composite - Google Patents
A kind of preparation method of carbon fiber reinforced aluminum matrix composite Download PDFInfo
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- CN107488819A CN107488819A CN201710694797.3A CN201710694797A CN107488819A CN 107488819 A CN107488819 A CN 107488819A CN 201710694797 A CN201710694797 A CN 201710694797A CN 107488819 A CN107488819 A CN 107488819A
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- carbon fiber
- matrix composite
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- aluminum matrix
- reinforced aluminum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/02—Pretreatment of the fibres or filaments
- C22C47/04—Pretreatment of the fibres or filaments by coating, e.g. with a protective or activated covering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
- C22C49/06—Aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses a kind of preparation method of carbon fiber reinforced aluminum matrix composite.This method comprises the following steps：Weigh following component：Carbon fiber, Fe, Pr, Mn, Ce, Si, Ti and Al；Carbon fiber is immersed in castor oil after 10 15min of low temperature immersion, naturally dry, then spray resin, and be pyrolyzed into porous material；After metallic copper is melted, dry copper carbon fiber on porous material is sprayed into；Copper carbon fiber is thinly sliced, adds in crucible and melts, continues to melt adding metallic aluminium powder, after stirring, puts into extruder and obtains the aluminium base of carbon fiber-containing；After being heated in the aluminium base input reactor of carbon fiber-containing, fe, praseodymium, manganese, chromium, silicon, titanium powder are added, adjusts to required weight fraction, is transferred in mould, be stripped after cooling.Aluminum matrix composite quality of the present invention is light, and tensile strength is big, and elongation percentage is high, and big by fatigue strength under repeatedly circulation cycle, is suitable for mechanical material field.
Description
Technical field
The present invention relates to field of composite material preparation, and in particular to a kind of preparation side of carbon fiber reinforced aluminum matrix composite
Method.
Background technology
A kind of special fibre that carbon fiber is made up of carbon, by fibrous polymer of the decomposition temperature less than melting temperature
Into its molecular structure is between graphite and diamond, and for carbon containing volume fraction more than 90%, density is only 1.85g/cm3, by force
Degree can reach 7000MPa or so, and high temperature resistant, corrosion-resistant, rub resistance, antifatigue etc..
Aluminium is face-centered cubic lattice, and no ppolymorphism transformation, ductility is good, plasticity is high, forming, is adapted to various machineries to add
Work, and aluminium and its alloy also have the advantages that good thermal conductivity, reflective, shortcoming are that low intensity, hardness is low, extreme influence aluminium
And its application of alloy.
Preparing the preparation technology of carbon fiber/aluminium alloy at present is：1st, it is entered according to the size to carbon cloth in finished product
Row is cut, then it is removed photoresist, roughening treatment；2nd, used using the method for electro-coppering after carbon cloth surface plating, taking-up
Deionized water is washed, and is dried in hot blast；3rd, by the size requirement of required finished product and its Spreading requirements of internal carbon fibers cloth to solid
State aluminium alloy is cut, and is then stacked alternately with carbon cloth and prefabricated component is made；4th, SPS sintered preforms.In preparation process,
There is a certain degree of damage to carbon fiber.
Application number 201510474484.8, entitled carbon fiber reinforced aluminum matrix composite and preparation method thereof, this is compound
The composition of material is by weight percent：Rare earth Nd 0.4-0.6%, carbon fiber 8-10%, Si5.5-6.5%, Cu1-4%,
Fe1.0%, Mn0.5%, Mg0.1%, Zn1.0%, surplus Al.Although the composite uses resin when carbon fiber is handled
Protection, but composite property is single, using receiving more limitation.
Application number 201310153720.7, entitled a kind of carbon fiber reinforced aluminum matrix composite and preparation method thereof, institute
The composition for stating composite is：By weight percentage：Carbon fiber 4-6%, Li1.0-1.3%, Nd0.7-0.9%, surplus are aluminium,
The length of described carbon fiber is 105nm-4.5mm.The composite density is less than 2.2g/cm3, tensile strength reaches
605MPa, yield strength reaches 452MPa, but this method process is cumbersome, and production cost is high.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of system of carbon fiber reinforced aluminum matrix composite
Preparation Method, this method is simple, and preparation cost is low, avoids carbon fiber from being damaged in preparation process.
A kind of preparation method of carbon fiber reinforced aluminum matrix composite, comprises the following steps：Step 1, according to weight fraction
Weigh following component：Carbon fiber 10-18%, Fe0.5-0.8%, Pr1-4%, Mn0.8-1.4%, Ce0.2-0.33%,
Si7.2-8.1%, Ti1.02-1.85%, surplus Al；Step 2, carbon fiber is immersed into low temperature in castor oil and soaks 10-15min
Afterwards, naturally dry, then resin is sprayed, and be pyrolyzed into porous material；Step 3, after metallic copper is melted, it is sprayed on porous material
Dry copper carbon fiber；Step 4, copper carbon fiber is thinly sliced, adds in crucible and melt, continued adding metallic aluminium powder
Melt, after stirring, put into extruder and obtain the aluminium base of carbon fiber-containing；Step 5, the aluminium base of carbon fiber-containing is put into reactor
After middle heating, fe, praseodymium, manganese, chromium, silicon, titanium powder are added, adjusts to required weight fraction, is transferred in mould, after cooling
The demoulding, you can.
It is that the length of carbon fiber is 2-6mm in step 1 as improved.
It is that resin described in step 2 is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, succinic acid as improved
The mixture of methanol resin.
It is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, succinic acid methanol described in step 2 as improved
The mass ratio of resin is 1-2:1:0.2-0.8.
It is that the extrusion parameter of extruder is 340-480 DEG C in step 4 as improved
It is that the temperature heated in step 5 is 800-920 DEG C as improved.
Beneficial effect：
Compared with prior art, aluminum matrix composite quality of the present invention is light, and tensile strength is big, and elongation percentage is high, and through excessive
Fatigue strength is big under secondary circulation cycle, is suitable for mechanical material field.
Embodiment
The present invention is further described in detail below by specific embodiment.
Embodiment 1
A kind of preparation method of carbon fiber reinforced aluminum matrix composite, comprises the following steps：Step 1, according to weight fraction
Weigh following component：Length is 2mm carbon fiber 10%, Fe0.5%, Pr1%, Mn0.8%, Ce0.2%, Si7.2%,
Ti1.02%, surplus Al；Step 2, carbon fiber is immersed in castor oil after low temperature immersion 10-15min, naturally dry, then sprayed
Resinize, and be pyrolyzed into porous material；Step 3, after metallic copper is melted, it is sprayed into dry that coppered carbon is fine on porous material
Dimension；Step 4, copper carbon fiber is thinly sliced, adds in crucible and melt, continued to melt adding metallic aluminium powder, stir
Afterwards, put into extruder extrude at 340 DEG C carbon fiber-containing aluminium base；Step 5, by the aluminium base input reactor of carbon fiber-containing
After being heated to 800 DEG C, fe, praseodymium, manganese, chromium, silicon, titanium powder are added, adjusts to required weight fraction, is transferred in mould,
It is stripped after cooling, you can.
Wherein, resin described in step 2 is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, succinic acid methanol resin
Mixture, and mass ratio be 1：1：0.2.
Embodiment 2
A kind of preparation method of carbon fiber reinforced aluminum matrix composite, comprises the following steps：Step 1, according to weight fraction
Weigh following component：Length is 4mm carbon fiber 12%, Fe0.6%, Pr1-4%, Mn0.8-1.4%, Ce0.28%,
Si7.9%, Ti1.25%, surplus Al；Step 2, carbon fiber is immersed in castor oil after low temperature immersion 12min, naturally dry,
Resin is sprayed again, and is pyrolyzed into porous material；Step 3, after metallic copper is melted, it is sprayed into dry coppered carbon on porous material
Fiber；Step 4, copper carbon fiber is thinly sliced, adds in crucible and melt, continue to melt adding metallic aluminium powder, stirring is equal
After even, put into extruder and the aluminium base of carbon fiber-containing is obtained at 400 DEG C；Step 5, by the aluminium base input reactor of carbon fiber-containing
880 DEG C are heated to, adds fe, praseodymium, manganese, chromium, silicon, titanium powder, adjusts to required weight fraction, is transferred in mould, it is cold
But it is stripped afterwards, you can.
Wherein, resin described in step 2 is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, succinic acid methanol resin
Mixture, and mass ratio be 1.5:1:0.6.
Embodiment 3
A kind of preparation method of carbon fiber reinforced aluminum matrix composite, comprises the following steps：Step 1, according to weight fraction
Weigh following component：Length is 6mm carbon fiber 18%, Fe0.8%, Pr1-4%, Mn1.4%, Ce0.33%, Si8.1%,
Ti1.85%, surplus Al；Step 2, carbon fiber is immersed in castor oil after low temperature immersion 15min, naturally dry, then sprays tree
Fat, and be pyrolyzed into porous material；Step 3, after metallic copper is melted, it is sprayed into dry copper carbon fiber on porous material；Step
Rapid 4, copper carbon fiber is thinly sliced, adds in crucible and melts, continues to melt adding metallic aluminium powder, after stirring, is thrown
Enter in extruder extruded at 480 DEG C carbon fiber-containing aluminium base；Step 5, will add in the aluminium base input reactor of carbon fiber-containing
Heat adds fe, praseodymium, manganese, chromium, silicon, titanium powder, adjusts to required weight fraction, be transferred in mould to 920 DEG C, cools down
After be stripped, you can.
Wherein, resin described in step 2 is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, succinic acid methanol resin
Mixture, and mass ratio is 1-2:1:0.2-0.8.
Comparative example 1
A kind of preparation method of carbon fiber reinforced aluminum matrix composite, comprises the following steps：Step 1, according to weight fraction
Weigh following component：Length is 4mm carbon fiber 12%, Fe0.6%, Pr1-4%, Mn0.8-1.4%, Ce0.28%,
Si7.9%, Ti1.25%, surplus Al；Step 2, carbon fiber is sprayed into resin, and be pyrolyzed into porous material；Step 3, by gold
Belong to after copper melts, be sprayed into dry copper carbon fiber on porous material；Step 4, copper carbon fiber is thinly sliced, adds earthenware
Melt in crucible, continue to melt adding metallic aluminium powder, after stirring, put into and obtain carbon fiber-containing in extruder at 400 DEG C
Aluminium base；Step 5, will carbon fiber-containing aluminium base input reactor in be heated to 880 DEG C, add fe, praseodymium, manganese, chromium, silicon,
Titanium powder, adjust to required weight fraction, be transferred in mould, be stripped after cooling, you can.
Wherein, resin described in step 2 is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, succinic acid methanol resin
Mixture, and mass ratio be 1.5:1:0.6.
Embodiment 1-3 and comparative example 1 composite are detected, the data obtained is as follows.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | |
| Tensile strength (MPa) | 258 | 354 | 283 | 158 |
| Elongation percentage (%) | 35.8 | 41.6 | 38.4 | 22.9 |
| Density (g/cm3) | 2.08 | 1.85 | 1.98 | 2.07 |
| 5×106Circulate fatigue strength (S/MPa) under cycle | 198 | 251 | 218 | 170 |
It is seen from the above data that composite quality of the present invention is light, tensile strength is big, and elongation percentage is high, and through excessive
Fatigue strength is big under secondary circulation cycle, is suitable for mechanical material field, comparing embodiment 2 and comparative example 1 are understood, by castor-oil plant
Carbon fiber after oil processing, mechanical property is strong, and elongation percentage doubles, and is adapted to industrialization.
In addition, the invention is not restricted to above-mentioned embodiment, as long as in without departing from the scope of the present invention, can take various
Mode implements the present invention.
Claims (6)
1. a kind of preparation method of carbon fiber reinforced aluminum matrix composite, it is characterised in that comprise the following steps：Step 1, according to
Weight fraction weighs following component：Carbon fiber 10-18%, Fe0.5-0.8%, Pr1-4%, Mn0.8-1.4%, Ce0.2-0.33%,
Si7.2-8.1%, Ti1.02-1.85%, surplus Al；Step 2, carbon fiber is immersed into low temperature in castor oil and soaks 10-15min
Afterwards, naturally dry, then resin is sprayed, and be pyrolyzed into porous material；Step 3, after metallic copper is melted, it is sprayed on porous material
Dry copper carbon fiber；Step 4, copper carbon fiber is thinly sliced, adds in crucible and melt, continued adding metallic aluminium powder
Melt, after stirring, put into extruder and obtain the aluminium base of carbon fiber-containing；Step 5, the aluminium base of carbon fiber-containing is put into reactor
After middle heating, fe, praseodymium, manganese, chromium, silicon, titanium powder are added, adjusts to required weight fraction, is transferred in mould, after cooling
The demoulding, you can.
A kind of 2. preparation method of carbon fiber reinforced aluminum matrix composite according to claim 1, it is characterised in that step
The length of carbon fiber is 2-6mm in 1.
A kind of 3. preparation method of carbon fiber reinforced aluminum matrix composite according to claim 1, it is characterised in that step
Resin described in 2 is polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, the mixture of succinic acid methanol resin.
A kind of 4. preparation method of carbon fiber reinforced aluminum matrix composite according to claim 3, it is characterised in that step
Polyethylene glycol propylhomoserin ethyl ester, sodium cellulose glycolate, the mass ratio of succinic acid methanol resin described in 2 are 1-2:1:0.2-
0.8。
A kind of 5. preparation method of carbon fiber reinforced aluminum matrix composite according to claim 1, it is characterised in that step
The extrusion parameter of extruder is 340-480 DEG C in 4.
A kind of 6. preparation method of carbon fiber reinforced aluminum matrix composite according to claim 1, it is characterised in that step
The temperature heated in 5 is 800-920 DEG C.
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| CN201710694797.3A CN107488819A (en) | 2017-08-14 | 2017-08-14 | A kind of preparation method of carbon fiber reinforced aluminum matrix composite |
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| CN201710694797.3A CN107488819A (en) | 2017-08-14 | 2017-08-14 | A kind of preparation method of carbon fiber reinforced aluminum matrix composite |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203794A (en) * | 2018-01-04 | 2018-06-26 | 中南大学 | A kind of short carbon fiber aluminum matrix composite and preparation method thereof |
| CN108440876A (en) * | 2018-03-12 | 2018-08-24 | 苏州经贸职业技术学院 | A kind of preparation method of compound strut material |
| CN109136796A (en) * | 2018-08-30 | 2019-01-04 | 徐州市茗尧机械制造有限公司 | A kind of building machinery material for transmission shaft |
| CN109321772A (en) * | 2018-09-29 | 2019-02-12 | 镇江宝海船舶五金有限公司 | A kind of ship anchor chains aluminum matrix composite and preparation method thereof |
| CN113088836A (en) * | 2021-03-18 | 2021-07-09 | 沈阳工业大学 | Method for preparing carbon fiber reinforced aluminum matrix composite material by electric arc spraying |
| CN114959517A (en) * | 2022-05-30 | 2022-08-30 | 中南大学 | Preparation method of aluminum-based composite material and aluminum-based composite material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602932A (en) * | 2013-12-10 | 2014-02-26 | 湖南健行康复器材科技发展有限公司 | Carbon-fiber-reinforced aluminum-base composite material and preparation method thereof |
| CN105039877A (en) * | 2015-08-05 | 2015-11-11 | 同济大学 | Carbon fiber reinforced aluminum-based composite material and preparation method and application thereof |
| CN105256349A (en) * | 2015-10-29 | 2016-01-20 | 无锡桥阳机械制造有限公司 | Preparation technology for composite material |
| CN106636986A (en) * | 2015-10-28 | 2017-05-10 | 空中客车运营有限公司 | Fibre-reinforced metal component for an aircraft or spacecraft and production methods for fibre-reinforced metal components |
-
2017
- 2017-08-14 CN CN201710694797.3A patent/CN107488819A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602932A (en) * | 2013-12-10 | 2014-02-26 | 湖南健行康复器材科技发展有限公司 | Carbon-fiber-reinforced aluminum-base composite material and preparation method thereof |
| CN105039877A (en) * | 2015-08-05 | 2015-11-11 | 同济大学 | Carbon fiber reinforced aluminum-based composite material and preparation method and application thereof |
| CN106636986A (en) * | 2015-10-28 | 2017-05-10 | 空中客车运营有限公司 | Fibre-reinforced metal component for an aircraft or spacecraft and production methods for fibre-reinforced metal components |
| CN105256349A (en) * | 2015-10-29 | 2016-01-20 | 无锡桥阳机械制造有限公司 | Preparation technology for composite material |
Non-Patent Citations (1)
| Title |
|---|
| 王玲等: "《金属基复合材料及其浸渗制备的理论与实践》", 31 October 2004, 冶金工业出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203794A (en) * | 2018-01-04 | 2018-06-26 | 中南大学 | A kind of short carbon fiber aluminum matrix composite and preparation method thereof |
| CN108440876A (en) * | 2018-03-12 | 2018-08-24 | 苏州经贸职业技术学院 | A kind of preparation method of compound strut material |
| CN109136796A (en) * | 2018-08-30 | 2019-01-04 | 徐州市茗尧机械制造有限公司 | A kind of building machinery material for transmission shaft |
| CN109321772A (en) * | 2018-09-29 | 2019-02-12 | 镇江宝海船舶五金有限公司 | A kind of ship anchor chains aluminum matrix composite and preparation method thereof |
| CN113088836A (en) * | 2021-03-18 | 2021-07-09 | 沈阳工业大学 | Method for preparing carbon fiber reinforced aluminum matrix composite material by electric arc spraying |
| CN113088836B (en) * | 2021-03-18 | 2022-06-07 | 沈阳工业大学 | Method for preparing carbon fiber reinforced aluminum matrix composite material by electric arc spraying |
| CN114959517A (en) * | 2022-05-30 | 2022-08-30 | 中南大学 | Preparation method of aluminum-based composite material and aluminum-based composite material |
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Application publication date: 20171219 |