CN105542524B - SiC strengthens the surface treatment method and face coat of metal-base composites - Google Patents
SiC strengthens the surface treatment method and face coat of metal-base composites Download PDFInfo
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
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Abstract
The invention discloses the surface treatment method and face coat of a kind of SiC enhancing metal-base composites, the surface treatment method includes：24~30 parts of water-soluble silicates, 1~5 part of silane coupler, 3~10 parts of aluminium triphosphates, 8~25 parts of water-soluble molybdenum hydrochlorates and 64~82 parts of deionized waters are mixed to get compound silica sol binder；15~30 parts of flake metal powders are added in 20~50 parts of organic alcohol solvents, and sequentially add 3~6 parts of silane couplers, 2~6 parts of ammoniacal liquor, 1~3 part of emulsifying agent, 0.5~1.2 part of levelling agent, 0.2~0.4 part of thickener, obtain paste mixture；Under 40~50 DEG C of water-baths and stirring condition, compound silica sol binder is added into paste mixture, coating liquid is made；Coating liquid is coated onto SiC enhancing film on metal matrix composite surface and dried, so as to prepare the good face coat of adhesive force, this can not only provide good barrier propterty, and not interfere with heat conduction and the electric conductivity of material.
Description
Technical field
The present invention relates to the technical field of surface of SiC enhancing metal-base composites, more particularly to a kind of SiC enhancings
The surface treatment method and face coat of metal-base composites.
Background technology
SiC enhancing metal-base composites has higher specific strength, specific stiffness, modulus of elasticity and wearability, also has
Relatively low thermal coefficient of expansion, have extensively in Aero-Space, automobile engine, precision instrument, Electronic Packaging, sports equipment etc.
General application prospect.Although metal-base composites, which is strengthened, using SiC can make many performances of material get a promotion,
But the homogeneity of material structure is also reduced simultaneously, so as to which material corrosion resisting property can be made to decline to a great extent, therefore metal is strengthened to SiC
Based composites are effectively surface-treated, and are particularly important with lifting corrosion-resistant, wear-resistant and pyro-oxidation resistance.
SiC/Al composites are great representational SiC enhancings metal-base composites.At present, to SiC/Al composite woods
Expecting the method that is surface-treated mainly includes differential arc oxidation, anodic oxidation, chemical passivation, organic coating etc., but differential arc oxidation,
Anodic oxidation, chemical passivation, the surface protection film generally existing corrosion resistance prepared by this several surface treatment method is not
Good, poor adhesive force, the problems such as destruction is susceptible to, and existing organic coating can have a strong impact on the heat conduction of SiC/Al composites
And electric conductivity.
The content of the invention
For above-mentioned weak point of the prior art, the invention provides a kind of SiC enhancing metal-base composites
The good surface of adhesive force is prepared on surface treatment method and face coat, the surface that can strengthen metal-base composites in SiC
Coating, it can not only strengthen metal-base composites to SiC and good barrier propterty is provided, and not interfere with SiC enhancing gold
The heat conduction of metal-matrix composite material and electric conductivity.
The purpose of the present invention is achieved through the following technical solutions：
A kind of surface treatment method of SiC enhancings metal-base composites, comprises the following steps：
Step A, by the water-soluble silicate of 24~30 mass parts, the silane coupler of 1~5 mass parts, 3~10 mass parts
Aluminium triphosphate, the water-soluble molybdenum hydrochlorate of 8~25 mass parts mixed with the deionized water of 64~82 mass parts, obtain comprehensive silicon
Sol adhesive；
Step B, the flake metal powder of 15~30 mass parts is added in the organic alcohol solvent of 20~50 mass parts, and
The silane coupler of 3~6 mass parts, the ammoniacal liquor of 2~6 mass parts pH=8~11,1~3 mass parts are sequentially added under stirring
Emulsifying agent, levelling agent, the thickener of 0.2~0.4 mass parts of 0.5~1.2 mass parts, it is fully dispersed, obtain paste mixing
Thing；Wherein, described flake metal powder is at least one of zinc powder, aluminium powder, magnesium powder, zinc aluminium alloy powder or zinc magnesium alloy powder；
Described organic alcohol solvent is at least one of polyethylene glycol, glycerine, ethylene glycol or DPG；
Step C, under 40~50 DEG C of water bath condition and stirring, added into paste mixture made from step B
Compound silica sol binder made from step A, and it is fully dispersed, obtain coating liquid；Wherein, paste mixture and compound Ludox
The mixed proportion of binding agent is：The compound Ludox for adding 50~65 mass parts in the paste mixture of every 35~50 mass parts glues
Tie agent；
Step D, coating liquid made from step C is coated to the surface of SiC enhancing metal-base composites, and 250~
Drying and processing is carried out at 350 DEG C, so as to prepare face coat on the surface of SiC enhancing metal-base composites.
Preferably, the metal in the SiC enhancings metal-base composites is aluminium, copper, titanium, aluminium alloy, copper alloy or titanium
Alloy.
Preferably, described silane coupler is KH550, at least one of KH560 or KH570；Described emulsifying agent
For at least one of NPE, APES or AEO；Described levelling
Agent is polyether-modified dimethyl silicone polymer；Described thickener is hydroxyethyl cellulose.
Preferably, described water-soluble silicate is sodium metasilicate, lithium metasilicate, potassium silicate or quaternary ammonium silicates；Described water
Dissolubility molybdate is sodium molybdate, lithium molybdate, potassium molybdate, ammonium molybdate or magnesium molybdate.
Preferably, in stepb, ammoniacal liquor add after, first stir at least 5 hours, sequentially add emulsifying agent, levelling agent and
Thickener, then redisperse at least 3 hours, obtain paste mixture.
A kind of face coat of SiC enhancings metal-base composites, is increased using the SiC described in above-mentioned above-mentioned technical proposal
The surface treatment method of strong metal based composites is prepared on the surface of SiC enhancing metal-base composites.
As seen from the above technical solution provided by the invention, the SiC enhancing Metal Substrates that the embodiment of the present invention is provided
The surface treatment method of composite strengthens gold by aluminium triphosphate and molybdate to the flake metal powder in coating liquid and SiC
Metal base in metal-matrix composite material is passivated, and ensures flake metal powder by the hydrolysis coating function of silane coupler
The characteristics of being stabilized in water-based coating liquid, while can forming chemical bond with metal and SiC simultaneously using silicate, uses
Ludox caused by silane coupler and water-soluble silicate hydrolysis strengthens SiC SiC and gold in metal-base composites
Belong to base material and the flake metal powder in coating liquid by silicon oxygen bond secure bond together with, can be in SiC enhancing metal-based compounds
Prepare the extraordinary face coat of adhesive force in the surface of material.In addition, flake metal powder can be in base material in coating preparation process
Surface layer arranges, and these flake metal powders covered layer by layer can not only provide excellent for SiC enhancing metal-base composites
Protective capacities, and flake metal powder itself has good conduction and the capacity of heat transmission, therefore when the coating liquid is coated to
After SiC enhancing film on metal matrix composite surface, SiC enhancing metal-base composites still has preferable heat conduction and electric conductivity,
It is compound to SiC/Al that this make it that the surface treatment method of SiC enhancings metal-base composites provided by the present invention is particularly suitable for use in
Material (one of SiC/Al composite main applications are used as electronic package material) carries out surfacecti proteon.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only part of the embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not paid, belongs to protection scope of the present invention.
Firstly the need of explanation, in embodiments of the present invention, the SiC in SiC enhancing metal-base composites is SiC
Grain or SiC fibers, and the metal in SiC enhancing metal-base composites is aluminium, copper, titanium, aluminium alloy, copper alloy or titanium alloy.
The surface treatment method of metal-base composites is strengthened to SiC provided by the present invention below and face coat is retouched in detail
State.
A kind of surface treatment method of SiC enhancings metal-base composites, comprises the following steps：
Step A, by the water-soluble silicate of 24~30 mass parts, the silane coupler of 1~5 mass parts, 3~10 mass parts
Aluminium triphosphate, the water-soluble molybdenum hydrochlorate of 8~25 mass parts mixed with the deionized water of 64~82 mass parts, obtain comprehensive silicon
Sol adhesive.
Wherein, described water-soluble silicate is sodium metasilicate, lithium metasilicate, potassium silicate or quaternary ammonium silicates；Described is water-soluble
Property molybdate is sodium molybdate, lithium molybdate, potassium molybdate, ammonium molybdate or magnesium molybdate；Described silane coupler is KH550, KH560 or
At least one of KH570.
Step B, the flake metal powder of 15~30 mass parts is added in the organic alcohol solvent of 20~50 mass parts, and
The silane coupler of 3~6 mass parts, the ammoniacal liquor of 2~6 mass parts pH=8~11,1~3 mass parts are sequentially added under stirring
Emulsifying agent, levelling agent, the thickener of 0.2~0.4 mass parts of 0.5~1.2 mass parts, it is fully dispersed, obtain paste mixing
Thing.
Wherein, described flake metal powder be zinc powder, aluminium powder, magnesium powder, zinc aluminium alloy powder or zinc magnesium alloy powder at least
It is a kind of；Described organic alcohol solvent is at least one of polyethylene glycol, glycerine, ethylene glycol or DPG；Described silicon
Alkane coupling agent is KH550, at least one of KH560 or KH570；Described emulsifying agent is NPE, alkyl
At least one of phenol polyethenoxy ether or AEO；Described levelling agent is polyether-modified polydimethylsiloxanes
Alkane；Described thickener is hydroxyethyl cellulose.Specifically, after flake metal powder is added in organic alcohol solvent, first exist
Silane coupling agent KH550 is added under stirring, then ammoniacal liquor is added dropwise with 1~5 drop/min speed under stirring, and is stirred
At least 5 hours, emulsifying agent, levelling agent and thickener are then sequentially added under stirring, and it is scattered at least 3 hours, so as to
Paste mixture is made.
Step C, under 40~50 DEG C of water bath condition and stirring, added into paste mixture made from step B
Compound silica sol binder made from step A, and it is fully dispersed, obtain coating liquid.
Wherein, the mixed proportion of paste mixture and compound silica sol binder is：The paste of every 35~50 mass parts mixes
The compound silica sol binder of 50~65 mass parts is added in compound.
Step D, coating liquid made from step C is coated to the surface of SiC enhancing metal-base composites, and 250~
Drying and processing is carried out at 350 DEG C, so as to prepare face coat on the surface of SiC enhancing metal-base composites.
Specifically, the surface treatment method principle of SiC enhancings metal-base composites provided by the present invention is as follows：
(1) aluminium triphosphate in the coating liquid and water-soluble molybdenum hydrochlorate can strengthen gold to flake metal powder and SiC
Metal base in metal-matrix composite material plays passivation, and the hydrolysis coating function of silane coupler can ensure lamellar gold
Category powder is stabilized in the coating liquid, while Ludox caused by silane coupler and water-soluble silicate hydrolysis is adding
SiC can be strengthened to the SiC in metal-base composites after heat and metal base passes through silicon with the flake metal powder in coating liquid
Oxygen key secure bond is together, extraordinary so as to prepare adhesive force on the surface of SiC enhancing metal-base composites
Face coat.
(2) layer by layer arrangement of the flake metal powder in coat not only can strengthen metal-base composites for SiC and provide
Excellent protective capacities, and flake metal powder itself has good conduction and the capacity of heat transmission, therefore when the coating liquid applies
After being layed onto SiC enhancing film on metal matrix composite surface, SiC enhancing metal-base composites still has preferable heat conduction and electric conductivity
Can, that is to say, that the face coat prepared according to the method described above in SiC enhancing film on metal matrix composite surface does not interfere with
The heat conduction of SiC enhancing metal-base composites and electric conductivity, this causes SiC enhancings metal-based compound material provided by the present invention
The surface treatment method of material is particularly suitable for use in, and to SiC/Al composites, (one of SiC/Al composite main applications are used as electricity
Sub- encapsulating material) carry out surfacecti proteon.
(3) in the prior art, it is freshly prepared go out SiC enhancing metal-base composites need to be heat-treated and can just make
With, and in the surface treatment method of SiC provided by the present invention enhancing metal-base composites, SiC enhancing metal-based compound materials
Material can not have to first be heat-treated, when the surface that coating liquid made from step C is coated to SiC enhancing metal-base composites
Afterwards, then with 250~350 DEG C of progress drying and processings, so as to which SiC to be strengthened to heat treatment process and the painting of metal-base composites
By being once heat-treated while completing, this can save process, save the energy drying course of layer.
In addition to above-mentioned technical proposal, present invention also offers a kind of SiC enhancing metal-base composites face coat,
Answered using the surface treatment method of the SiC enhancing metal-base composites described in above-mentioned technical proposal in SiC enhancings Metal Substrate
The surface of condensation material is prepared.
As fully visible, it is good can to prepare adhesive force on the surface of SiC enhancing metal-base composites for the embodiment of the present invention
Face coat, can not only strengthen metal-base composites to SiC and good barrier propterty is provided, and not interfere with SiC
Strengthen heat conduction and the electric conductivity of metal-base composites, there is preferable actual application prospect.
In order to more clearly from show technical scheme provided by the present invention and caused technique effect, below with several
The surface treatment method for the SiC enhancing metal-base composites that individual specific embodiment is provided the embodiment of the present invention and surface apply
Layer is described in detail.
Embodiment 1
A kind of surface treatment method of SiC enhancings metal-base composites, comprises the following steps：
Step A1, the lithium silicate aqueous solution that 96g mass fractions are 30%, modulus is 4.8 is added in beaker, continuous
12g sodium molybdates and 10g deionized waters are added under stirring water bath condition and 2g Silane coupling agent KH550s are added dropwise, it is ultra-fine to add 5g
Tripolyphosphate aluminium powder, is dispersed with stirring, and obtains compound silica sol binder.
Step B1,23g flake aluminums are added in 30g organic alcohol solvents, and 5g silane idol is added under stirring
Join agent KH550, be sufficiently stirred ammoniacal liquor scattered, then that 3ml pH=10 are slowly added dropwise, after stirring at least 5 hours, sequentially add
The polyether-modified dimethyl silicone polymers of 1.6g AEOs O-20,0.7g, 0.36g hydroxyethyl celluloses, fully divide
After dissipating 3 hours, paste mixture is obtained.
Step C1, under 40~50 DEG C of water bath condition and stirring, according to adding 55g in every 45g paste mixtures
The ratio of compound silica sol binder, it is molten that comprehensive silicon made from step A1 is slowly added into paste mixture made from step B1
Glue caking agent, and it is sufficiently stirred scattered, obtain coating liquid.
Step D1, by coating liquid made from step C1 be coated to SiC enhancing metal-base composites surface, and by from
After scheming centrifugal treating, it is placed in Muffle furnace and is dried with 250~350 DEG C, so as to which metal-based compound material can be strengthened in SiC
Bright Al-based coating is made in the surface of material, and coating adhesion is up to more than 3 grades.
Embodiment 2
A kind of surface treatment method of SiC enhancings metal-base composites, comprises the following steps：
Step A2, by 96g mass fractions be 30%, modulus be that 4.8 lithium silicate aqueous solutions are added in beaker, continuous
Stir and 12g sodium molybdates and 10g deionized waters dropwise addition 2g Silane coupling agent KH550s are added under water bath condition, add 5g ultra-fine three
Poly aluminium phosphate powder, is dispersed with stirring, and obtains compound silica sol binder.
Step B2,30g sheet zinc aluminium alloy powders are added in 30g organic alcohol solvents, and 5g is added under stirring
Silane coupling agent KH550, ammoniacal liquor scattered, then that 3ml pH=10 are slowly added dropwise is sufficiently stirred, after stirring at least 5 hours, successively
The polyether-modified dimethyl silicone polymer of 1.6g AEOs 0-20,0.7g is added, 0.36g hydroxyethyl celluloses, is filled
After scattered 3 hours, paste mixture is obtained.
Step C2, under 40~50 DEG C of water bath condition and stirring, according to adding 55g in every 45g paste mixtures
The ratio of compound silica sol binder, it is molten that comprehensive silicon made from step A2 is slowly added into paste mixture made from step B2
Glue caking agent, and it is sufficiently stirred scattered, obtain coating liquid.
Step D2, by coating liquid made from step C2 be coated to SiC enhancing metal-base composites surface, and by from
After scheming centrifugal treating, it is placed in Muffle furnace and is dried with 250~350 DEG C, so as to which metal-based compound material can be strengthened in SiC
Bright Zinc and Aluminum Base Coating is made in the surface of material, and coating adhesion is up to more than 3 grades.
As fully visible, it is good can to prepare adhesive force on the surface of SiC enhancing metal-base composites for the embodiment of the present invention
Face coat, can not only strengthen metal-base composites to SiC and good barrier propterty is provided, and not interfere with SiC
Strengthen heat conduction and the electric conductivity of metal-base composites, there is preferable actual application prospect.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (6)
1. a kind of surface treatment method of SiC enhancings metal-base composites, it is characterised in that comprise the following steps：
Step A, by the water-soluble silicate of 24~30 mass parts, the silane coupler of 1~5 mass parts, 3~10 mass parts three
Poly aluminium phosphate, the water-soluble molybdenum hydrochlorate of 8~25 mass parts mix with the deionized water of 64~82 mass parts, obtain compound Ludox
Binding agent；
Step B, the flake metal powder of 15~30 mass parts is added in the organic alcohol solvent of 20~50 mass parts, and stirred
The silane coupler of 3~6 mass parts, the ammoniacal liquor of 2~6 mass parts pH=8~11, the breast of 1~3 mass parts are sequentially added under state
Agent, the levelling agent of 0.5~1.2 mass parts, the thickener of 0.2~0.4 mass parts, it is fully dispersed, obtain paste mixture；
Wherein, described flake metal powder is at least one of zinc powder, aluminium powder, magnesium powder, zinc aluminium alloy powder or zinc magnesium alloy powder；
Described organic alcohol solvent is at least one of polyethylene glycol, glycerine, ethylene glycol or DPG；
Step C, under 40~50 DEG C of water bath condition and stirring, step A is added into paste mixture made from step B
Obtained compound silica sol binder, and it is fully dispersed, obtain coating liquid；
Wherein, the mixed proportion of paste mixture and compound silica sol binder is：The paste mixture of every 35~50 mass parts
The middle compound silica sol binder for adding 50~65 mass parts；
Step D, coating liquid made from step C is coated to the surface of SiC enhancing metal-base composites, and at 250~350 DEG C
Lower carry out drying and processing, so as to prepare face coat on the surface of SiC enhancing metal-base composites.
2. the surface treatment method of SiC enhancings metal-base composites according to claim 1, it is characterised in that described
Metal in SiC enhancing metal-base composites is aluminium, copper, titanium, aluminium alloy, copper alloy or titanium alloy.
3. the surface treatment method of SiC enhancings metal-base composites according to claim 1 or 2, it is characterised in that institute
The silane coupler stated is KH550, at least one of KH560 or KH570；Described emulsifying agent is APES
Or at least one of AEO；Described levelling agent is polyether-modified dimethyl silicone polymer；Described increasing
Thick dose is hydroxyethyl cellulose.
4. the surface treatment method of SiC enhancings metal-base composites according to claim 1 or 2, it is characterised in that institute
The water-soluble silicate stated is sodium metasilicate, lithium metasilicate, potassium silicate or quaternary ammonium silicates；Described water-soluble molybdenum hydrochlorate is molybdic acid
Sodium, lithium molybdate, potassium molybdate, ammonium molybdate or magnesium molybdate.
5. the surface treatment method of SiC enhancings metal-base composites according to claim 1 or 2, it is characterised in that
In step B, after ammoniacal liquor adds, first stir at least 5 hours, sequentially add emulsifying agent, levelling agent and thickener, then redisperse
At least 3 hours, obtain paste mixture.
6. a kind of face coat of SiC enhancings metal-base composites, it is characterised in that appoint using in the claims 1 to 5
Surface system of the surface treatment method of SiC enhancing metal-base composites described in one in SiC enhancing metal-base composites
It is standby to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975185.2A CN105542524B (en) | 2015-12-22 | 2015-12-22 | SiC strengthens the surface treatment method and face coat of metal-base composites |
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| CN109183109A (en) * | 2018-10-31 | 2019-01-11 | 哈尔滨工业大学 | A method of enhancing aluminum-base composite material by silicon carbide particles salt air corrosion ability is improved by differential arc oxidation |
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