CN105418165B - A kind of alumina composite whisker and preparation method thereof, composite material - Google Patents
A kind of alumina composite whisker and preparation method thereof, composite material Download PDFInfo
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- CN105418165B CN105418165B CN201510761045.5A CN201510761045A CN105418165B CN 105418165 B CN105418165 B CN 105418165B CN 201510761045 A CN201510761045 A CN 201510761045A CN 105418165 B CN105418165 B CN 105418165B
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000002131 composite material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- RUDFQVOCFDJEEF-UHFFFAOYSA-N oxygen(2-);yttrium(3+) Chemical class [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000007864 aqueous solution Substances 0.000 claims abstract description 25
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 20
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 19
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 19
- 238000001556 precipitation Methods 0.000 claims abstract description 12
- 150000003746 yttrium Chemical class 0.000 claims abstract description 12
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 239000002270 dispersing agent Substances 0.000 claims abstract description 9
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000006185 dispersion Substances 0.000 claims abstract description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 6
- 238000000498 ball milling Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- DEXZEPDUSNRVTN-UHFFFAOYSA-K yttrium(3+);trihydroxide Chemical compound [OH-].[OH-].[OH-].[Y+3] DEXZEPDUSNRVTN-UHFFFAOYSA-K 0.000 claims abstract description 6
- 238000000151 deposition Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 25
- 229910000838 Al alloy Inorganic materials 0.000 description 14
- 239000000919 ceramic Substances 0.000 description 13
- QBAZWXKSCUESGU-UHFFFAOYSA-N yttrium(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Y+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QBAZWXKSCUESGU-UHFFFAOYSA-N 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002114 nanocomposite Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5276—Whiskers, spindles, needles or pins
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a kind of alumina composite whisker and preparation method thereof, composite material, which is made of 98wt% 99wt% aluminium oxide, 0.5wt% 1.5wt% yttrium oxides, 0.1wt% 0.5wt% metallic yttriums；Yttrium oxide is coated on the outer surface of aluminium oxide, and metallic yttrium is coated on the outer surface of yttrium oxide.Preparation method includes step：(1)Al2O3Whisker is added in the aqueous solution of dispersant, is made into the first mixed liquor；(2) aqueous solution of water-soluble yttrium salt, which is added in the first mixed liquor, obtains the second mixed liquor；(3) pH that the second mixed liquor is adjusted with ammonium hydroxide is 7.5 8.5, and the surface that yttrium hydroxide is deposited on whisker forms precipitation；(4) it will be calcined after precipitation filtering cleaning, obtain Al2O3‑Y2O3Whisker；(5) by Al2O3‑Y2O3After the dispersion of whisker ball milling, yttrium film is deposited on its surface, obtains composite crystal palpus.Alumina composite whisker provided by the invention, can be improved its bond strength with basis material, can be used for preparing the composite material for meeting 3C Product requirement.
Description
Technical field
The present invention relates to more particularly to a kind of alumina composite whisker and preparation method thereof, composite material.
Background technology
With the development that cell phone intelligent is dressed, as smart mobile phone and smartwatch the electronics production quickly grown in recent years
Product, consumer increasingly focus on the transformation from function to fashion, and product increasingly focuses on its fashion, and the requirement to appearance is more next
It is higher.Future, metal and fine ceramics are main outer as smart mobile phone, smartwatch by the most of high molecular material of substitution
See material, but metal and ceramics as intellectual product appearance material there is also some shortcomings, such as metallic mobile phone outline border due to
Insufficient strength is easy bending, hits recess, fine ceramics toughness is inadequate, easy fracture, intolerant to collision.Improve the intensity and pottery of metal
The toughness of porcelain has highly important market value.The nano whisker composite material of high intensity Gao Gangliang can greatly improve pottery
The toughness of porcelain and the intensity of metal, but just amount is big, hardness is high for whisker, and the interface bond strength of whisker and basis material is that its is compound
The problem of material.Whisker is allowed to have preferable metallurgical binding with basis material by surface treatment and thermally matched to be that whisker is strengthened multiple
The key technology of condensation material.
Invention content
A kind of alumina composite whisker of present invention proposition and preparation method thereof, composite material.
The technical problem of the present invention is resolved by technical solution below：
A kind of alumina composite whisker, is made of following each component：The mass content of aluminium oxide is 98%-99%, aoxidizes
The mass content of yttrium is 0.5%-1.5%, the mass content of metallic yttrium is 0.1%-0.5%；The yttrium oxide is coated on described
The outer surface of aluminium oxide, the metallic yttrium are coated on the outer surface of the yttrium oxide.
A kind of preparation method of alumina composite whisker, includes the following steps：
(1) by Al2O3Whisker is added in the aqueous solution of dispersant, is configured to the first of whisker solid content 10wt%-15wt%
Mixed liquor；
(2) aqueous solution of water-soluble yttrium salt is added in first mixed liquor and obtains the second mixed liquor, described second is mixed
It closes in liquid, the volume of first mixed liquor accounts for 60%-90%, and the volume of the aqueous solution of the water solubility yttrium salt accounts for 10%-
40%；
(3) it is adjusted between the pH of second mixed liquor is 7.5-8.5 with ammonium hydroxide, yttrium hydroxide is deposited on the Al2O3It is brilliant
The surface of palpus forms precipitation；
(4) it by after the precipitation filtering cleaning in step (3), is calcined at 1250 DEG C -1300 DEG C, obtains Al2O3-Y2O3It is brilliant
It must, wherein Y2O3It is coated on Al2O3Outer surface；
(5) by Al2O3-Y2O3After the dispersion of whisker ball milling, in the Al2O3-Y2O3The surface deposited metal yttrium film of whisker, is obtained
Obtain Al2O3-Y2O3- Y composite crystal palpuses, the metallic yttrium film are coated on the Y2O3Outer surface.
A kind of composite material, the composite material be by the alumina composite whisker and basis material it is complex sintered and
At in the composite material, the mass content of the alumina composite whisker is 1%-10%.
The beneficial effect of the present invention compared with the prior art is：Alumina composite whisker provided by the invention, can be improved
Al2O3The bond strength of whisker and basis material, the composite crystal must can have preferable bond strength by this crystalline substance with zirconia ceramics
It must be added in zirconia ceramics, the zirconia composite ceramics material that the whisker of high tenacity is strengthened can be prepared；Meanwhile this is multiple
Synthetic can must have preferable wetability with aluminium alloy again, this whisker is added in aluminum alloy materials, high intensity can be prepared
The Al alloy composite of high rigidity.
Description of the drawings
Fig. 1 is the schematic cross-section of the alumina composite whisker in the specific embodiment of the invention；
Specific implementation mode
Below against attached drawing and in conjunction with preferred embodiment, the invention will be further described.
The present invention provides a kind of alumina composite whisker, in a specific embodiment, the alumina composite whisker by with
Lower each group is grouped as：The mass content of aluminium oxide is 98%-99%, the mass content of yttrium oxide is 0.5%-1.5%, metallic yttrium
Mass content be 0.1%-0.5%；As shown in Figure 1, the yttrium oxide 2, which forms a film, is coated on the outer surface of the aluminium oxide 1, institute
State the outer surface that the film forming of metallic yttrium 3 is coated on the yttrium oxide 2.
The present invention provides a kind of preparation method of alumina composite whisker, in a particular embodiment, including walks as follows
Suddenly：
(1) by Al2O3Whisker is added in the aqueous solution of dispersant, is configured to the first of whisker solid content 10wt%-15wt%
Mixed liquor；
(2) aqueous solution of water-soluble yttrium salt is added in first mixed liquor and obtains the second mixed liquor, described second is mixed
It closes in liquid, the volume of the first mixed liquor accounts for 60%-90%, and the volume of the aqueous solution of the water solubility yttrium salt accounts for 10%-40%；
(3) it is adjusted between the pH of second mixed liquor is 7.5-8.5 with ammonium hydroxide, yttrium hydroxide is deposited on the Al2O3It is brilliant
The surface of palpus forms precipitation；
(4) it by after the precipitation filtering cleaning in step (3), is calcined at 1250 DEG C -1300 DEG C, obtains Al2O3-Y2O3It is brilliant
It must, wherein Y2O3It is coated on Al2O3Outer surface；
(5) by Al2O3-Y2O3After the dispersion of whisker ball milling, in the Al2O3-Y2O3The surface deposited metal yttrium film of whisker, is obtained
Obtain Al2O3-Y2O3- Y composite crystal palpuses, the metallic yttrium film are coated on the Y2O3Outer surface.
In some preferred embodiments, one of following scheme or arbitrary combination can be selected：
Al in the step (1)2O3Whisker is in rodlike, the length of 500nm-1000nm, a diameter of 50nm-100nm.
In the aqueous solution of dispersant described in the step (1), the mass content of dispersant is 1%-2%；The dispersion
Agent is at least one of polyvinyl alcohol (PVA) and polyethylene glycol (PEG).
In the step (2), in the aqueous solution of the water solubility yttrium salt, the mass content of water-soluble yttrium salt is 5%-
10%.The water-soluble further preferred yttrium nitrate hexahydrate of yttrium salt.
The step (1) and/or (2) and/or (3) are carried out at 40 DEG C -50 DEG C.
In the step (4), the soaking time of calcining is 2h-3h.
In the step (5), the deposition is carried out in plasma PVD vacuum drying ovens, sedimentation time 1h-2h, deposition
200 DEG C -300 DEG C of temperature；In the step (5), the thickness of the metallic yttrium film of deposition is 1~2 μm.
The present invention also provides a kind of composite materials, in a particular embodiment, by the oxidation in the above embodiment
Aluminium composite crystal must with basis material is complex sintered forms, in the composite material, the alumina composite whisker accounts for the base
The 1%-10% of the quality of body material.
Wherein it is preferred to which described matrix material is zirconia ceramics material or aluminum alloy materials.
Below by more specific embodiment, the present invention will be described in detail.
Embodiment one
The preparation method of alumina composite whisker, includes the following steps：
(1) at 40 DEG C -50 DEG C, by Al2O3Whisker is added in PVA aqueous solutions, is configured to the of whisker solid content 10wt%
One mixed liquor.Wherein, Al2O3The length of whisker is 800nm, a diameter of 50nm；The mass content of PVA is 1% in PVA aqueous solutions.
(2) at 40 DEG C -50 DEG C, yttrium nitrate hexahydrate aqueous solution is added in the first mixed liquor of step (1) and obtains second
Mixed liquor, in the second mixed liquor, the volume of the first mixed liquor accounts for 80%, and the volume of yttrium nitrate hexahydrate aqueous solution accounts for 20%.Wherein,
The mass concentration of yttrium nitrate hexahydrate aqueous solution is 5%.
(3) it is 8.0 to adjust the pH of second mixed liquor with ammonium hydroxide, and yttrium hydroxide is deposited on Al2O3The surface of whisker is formed
Precipitation；
(4) it by after the precipitation filtering cleaning in step (3), is calcined at 1280 DEG C, keeps the temperature 2h, obtain Al2O3-Y2O3It is brilliant
It must, wherein Y2O3It is coated on Al2O3Outer surface；
(5) by Al2O3-Y2O3Whisker ball milling dispersion after, in plasma PVD vacuum drying ovens vapor deposition metallic yttrium film in
Al2O3-Y2O3The surface of whisker, sedimentation time 1h, 200 DEG C of depositing temperature obtain Al2O3-Y2O3- Y composite crystals must, wherein gold
The thickness for belonging to yttrium film is 1 μm.
Embodiment two
Zirconia ceramics is added by the 5% of zirconia ceramics powder weight in the alumina composite whisker that embodiment one is obtained
Powder (3Y-ZrO2) in (granularity 200nm) wet-milling be spray-dried again within 24 hours, standard sample compression moulding.Then in hot static pressure
Hot pressed sintering in stove, 1350 DEG C, pressure 250Mpa, dwell time 2h of temperature obtain combined oxidation zirconia material.Measure the composite oxygen
The bending strength for changing zirconia material is 1500Mpa, and fracture toughness K1C reaches 13MPam1/2。
Zirconia ceramics material is applied in smart mobile phone and wrist-watch at present, but product be only limited to button, bottom cover,
The safety coefficient of the small part such as ornamental strip, the zirconia ceramics of the big part such as backboard battery lid and shell is not high.Existing oxidation
The fracture toughness K1C of zircon ceramic material is in 6MPam1/2Left and right, bending strength is in 900Mpa or so, it is difficult to meet battery of mobile phone
The requirement of lid, backboard and Watchcase.Nano composite oxides aluminium in zirconia ceramics material in compound above-described embodiment is brilliant
The intensity and toughness of zirconia ceramics material must can be greatly improved, fracture toughness K1C can reach 13MPam1/2, bending resistance
Intensity can reach 1500Mpa, and impact test reaches the requirement of 3C Product.
Embodiment three
The preparation method of alumina composite whisker, includes the following steps：
(1) at 40 DEG C -50 DEG C, by Al2O3Whisker is added in PEG aqueous solutions, is configured to the of whisker solid content 15wt%
One mixed liquor.Wherein, Al2O3The length of whisker is 1000nm, a diameter of 80nm；The content of PEG is 2% in PEG aqueous solutions.
(2) at 40 DEG C -50 DEG C, yttrium nitrate hexahydrate aqueous solution is added in the first mixed liquor of step (1) and obtains second
Mixed liquor, in the second mixed liquor, the volume of the first mixed liquor accounts for 70%, and the volume of yttrium nitrate hexahydrate aqueous solution accounts for 30%.Wherein,
A concentration of the 10% of yttrium nitrate hexahydrate aqueous solution.
(3) it is 8.5 to adjust the pH of second mixed liquor with ammonium hydroxide, and yttrium hydroxide is deposited on Al2O3The surface of whisker is formed
Precipitation；
(4) it by after the precipitation filtering cleaning in step (3), is calcined at 1280 DEG C, keeps the temperature 2.5h, obtain Al2O3-Y2O3
Whisker, wherein Y2O3It is coated on Al2O3Outer surface；
(5) by Al2O3-Y2O3Whisker ball milling dispersion after, in plasma PVD vacuum drying ovens vapor deposition metallic yttrium film in
Al2O3-Y2O3The surface of whisker, sedimentation time 2h, 300 DEG C of depositing temperature obtain Al2O3-Y2O3- Y composite crystals must, wherein gold
The thickness for belonging to yttrium film is 2 μm.
Example IV
The alumina composite whisker that embodiment two obtains is entered into aluminium alloy powder (aluminium alloy by the 10% of aluminium alloy weight
In, aluminium accounts for 97wt%, and magnesium accounts for 2wt%, and lithium accounts for 1wt%), standard sample compression moulding.Then the hot pressed sintering in hot static pressure stove,
700 DEG C, pressure 100Mpa, dwell time 1h of temperature obtains Al-alloy material.Measure the bending resistance of the Al-alloy material
Intensity is 900Mpa, and hardness reaches HV240.
Aluminium alloy has become the main material of mobile phone center at present, but aluminium alloy center has the easy section of shock, recess, deformation
The problems such as.Nano composite oxides al whisker in aluminum alloy materials in compound above-described embodiment can greatly improve aluminium alloy
Intensity and hardness, bending strength can be from original 500Mpa promotions to 900Mpa, and hardness can be increased to from original HV120
HV240 overcomes the problems, such as that current aluminium alloy center exists.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those skilled in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, several equivalent substitute or obvious modifications can also be made, and performance or use is identical, all answered
When being considered as belonging to protection scope of the present invention.
Claims (8)
1. a kind of preparation method of alumina composite whisker, which is characterized in that include the following steps：
(1) by Al2O3Whisker is added in the aqueous solution of dispersant, is configured to the first mixing of whisker solid content 10wt%-15wt%
Liquid；
(2) aqueous solution of water-soluble yttrium salt is added in first mixed liquor and obtains the second mixed liquor, second mixed liquor
In, the volume of first mixed liquor accounts for 60%-90%, and the volume of the aqueous solution of the water solubility yttrium salt accounts for 10%-40%；
(3) it is adjusted between the pH of second mixed liquor is 7.5-8.5 with ammonium hydroxide, yttrium hydroxide is deposited on the Al2O3Whisker
Surface forms precipitation；
(4) it by after the precipitation filtering cleaning in step (3), is calcined at 1250 DEG C -1300 DEG C, obtains Al2O3-Y2O3Whisker,
In, Y2O3It is coated on Al2O3Outer surface；
(5) by Al2O3-Y2O3After the dispersion of whisker ball milling, in the Al2O3-Y2O3The surface deposited metal yttrium film of whisker obtains
Al2O3-Y2O3- Y composite crystal palpuses, the metallic yttrium film are coated on the Y2O3Outer surface.
2. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：Al in the step (1)2O3
Whisker is in rodlike, length 500nm-1000nm, a diameter of 50nm-100nm.
3. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：Described in the step (1)
In the aqueous solution of dispersant, the mass content of dispersant is 1%-2%；The dispersant is in polyvinyl alcohol and polyethylene glycol
It is at least one.
4. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：It is described in the step (2)
In the aqueous solution of water-soluble yttrium salt, the mass content of water-soluble yttrium salt is 5%-10%.
5. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：The step (1) and/or
(2) and/or (3) are carried out at 40 DEG C -50 DEG C.
6. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：In the step (4), calcining
Soaking time be 2h-3h.
7. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：It is described in the step (5)
Deposition is carried out in plasma PVD vacuum drying ovens, sedimentation time 1h-2h, 200 DEG C -300 DEG C of depositing temperature；The step (5)
In, the thickness of the metallic yttrium film of deposition is 1~2 μm.
8. the preparation method of alumina composite whisker as described in claim 1, it is characterised in that：The Al of the step (5)2O3-
Y2O3In-Y composite crystal palpuses, the mass content of aluminium oxide is 98%-99%, the mass content of yttrium oxide is 0.5%-1.5%, gold
The mass content for belonging to yttrium is 0.1%-0.5%.
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| CN106892660A (en) * | 2017-01-16 | 2017-06-27 | 广东百工新材料科技有限公司 | A kind of ceramic mobile phone bonnet and preparation method thereof |
| CN110563477B (en) * | 2019-09-20 | 2022-05-13 | 江苏金石研磨有限公司 | Preparation method of in-situ grown alumina whisker reinforced and toughened zirconium-aluminum composite ceramic material |
| CN112778009A (en) * | 2021-02-25 | 2021-05-11 | 王金波 | Whisker toughened zirconia ceramic and preparation method thereof |
| CN115231875B (en) * | 2022-08-05 | 2023-08-22 | 河北秦启新材料技术有限公司 | Expressway rapid repair material and application method thereof |
| CN115960575A (en) * | 2022-08-05 | 2023-04-14 | 环亚正安(北京)建筑材料有限公司 | Sealing material for culvert settlement joint and use method thereof |
| CN115181534A (en) * | 2022-08-05 | 2022-10-14 | 环亚正安(北京)建筑材料有限公司 | Multi-component flexible sealing material for caulking and use method thereof |
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