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CN102491783B - Repairing method of carbon ceramic brake-disc coating - Google Patents

Repairing method of carbon ceramic brake-disc coating Download PDF

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Publication number
CN102491783B
CN102491783B CN 201110372669 CN201110372669A CN102491783B CN 102491783 B CN102491783 B CN 102491783B CN 201110372669 CN201110372669 CN 201110372669 CN 201110372669 A CN201110372669 A CN 201110372669A CN 102491783 B CN102491783 B CN 102491783B
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coating
glass powder
carbon
solvent
slurry
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CN102491783A (en
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王一光
成来飞
张立同
杨娟
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Abstract

The invention relates to a repairing method of a carbon ceramic brake-disc coating. Technical characteristics of the invention comprise that: a carbon ceramic brake-disc requiring reparation is subject to ultrasonic washing; mixed slurries composed of three types of glass powders with different softening points, a solvent, organic silane and a solid filling object are prepared; the brake-disc is respectively coated by three layers, which are an inner coating layer, a middle coating layer and an outer coating layer; the coating layers are cured, such that the reparation of the carbon ceramic brake-disc is finished. With the method provided by the invention, a prepared glass coating has a high compactness; the process stability is good; a preparation period is short, and the oxidation resistance of a composite material can be effectively improved. Also, the method is a low-temperature coating preparation technology. With the method provided by the invention, a good anti-oxidative effect can be provided for a carbon-fiber-reinforced carbon substrate composite material (a C/C composite material) and a carbon-fiber-reinforced carbon and silicon carbide substrate composite material (a C/C-SiC composite material).

Description

A kind of method for repairing and mending of carbon pottery brake-disc coating
Technical field
The present invention relates to a kind of method for repairing and mending of carbon pottery brake-disc coating, relate to a kind of carbon pottery brake-disc coating at lines mending method.
Background technology
The aircraft brake ancillary equipment is that aircraft is realized braking and ensured one of key part of flight safety, and it is to utilize between the friction surface of relative movement to produce the purpose that friction reaches braking.Aircraft need to rely on the braking devices kinetic energy that it is huge to change heat energy into and distributes in tens seconds of landing braking, and produces rapid temperature rise on the brake flange surface during braking, can make surface temperature reach 600 ℃ more than-800 ℃.
The carbon ceramic material is the widely used material of present brake flange, has that density is low, wear-resisting, characteristics such as oxidation-resistance and good thermal shock.The distinguishing feature of carbon material is to keep stable in larger temperature range, and its disadvantage is that oxidation easily occurs in air more than 400 ℃.Carbon pottery brake material surface exists exposed carbon fiber and carbon base body.These exposed carbon fiber and carbon base bodies are easily oxidized in the high temperature oxidation stability environment.The density of material reduces during mild oxidation, strength degradation, and along with temperature raises, matrix material oxidation aggravation, layering can appear in material during severe oxidation, even becomes cotton-shapedly, completely loses the mechanical property of material, causes aircraft brake to lose efficacy, even has an accident.Therefore the anti-oxidation of carbon pottery brake material mainly is the oxidation that prevents carbon fiber and the carbon base body of surface exposure.
Carbon pottery brake material production cost is high, expensive, also is great loss economically because oxidation causes the secondary premature failure of brake.Must solve the oxidation-resistance problem of material, so have great importance for the research of carbon pottery brake material inoxidzable coating for this reason.At present remarkable for the achievement in research of this respect.The coating main preparation methods has chemical Vapor deposition process, sol-gel method, and liquid phase method, solid state diffusion method etc., the prepared coating of these methods can both well be protected matrix on degree.But the problem that exists is that brake flange can cause top coat that certain destruction is arranged in the equipment process, thereby affects the provide protection of coating, affects the normal use of carbon ceramic material.In order to address this problem, the online recovery technique of research coating becomes a focus.
Present coat preparing technology is more, but all can not repair online, such as sol-gel method, needs could form coating through pyroprocessing, and this has just limited its online remedy action.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of method for repairing and mending of carbon pottery brake-disc coating, be a kind of simple effectively and the technology that can repair online, at room temperature preparation, and can under comparatively high temps, protecting material.
Technical scheme
A kind of method for repairing and mending of carbon pottery brake-disc coating is characterized in that repairing step as follows:
Step 1: adopt the carbon pottery brake flange that clear water will be to be repaired to carry out ultrasonic cleaning 20~30 minutes, then place in 100 ℃ of baking ovens through oven dry in 20~30 minutes;
Step 2: be that 650~750 ℃ glass powder, solvent, organosilane and solid filling mixes with softening temperature, the slurry that obtains mixing through ball milling; Then slurry is brushed in the damaged coating place, make its curing under 80~120 ℃ of low temperature, obtain undercoat; Described glass powder: solvent: organosilane: the mass ratio of solid filling is 3~4: 3~4: 1~1.5: 1~1.5
Step 3: be that 450~550 ℃ glass powder, solvent, organosilane mixes with softening temperature, the slurry that obtains mixing through ball milling; Then slurry is brushed on undercoat, make its curing under 80~120 ℃, obtain inter coat; Described glass powder: solvent: the mass ratio of organosilane is 3~4: 3~4: 1~1.5
Step 4: be that 350~400 ℃ glass powder, solvent, organosilane and solid filling mixes with softening temperature, the slurry that obtains mixing through ball milling; Then slurry is brushed in inter coat, make its curing under 80~120 ℃, obtain external coating (EC); The mass ratio of described glass powder, solvent, organosilane and solid filling is 3~4: 3~4: 1~1.5: 1~1.5
Described solid filling is aluminium hydroxide or aluminum oxide.
Curing in described step 2, step 3 and the step 4 adopts the infrared lamp irradiation to make its curing.
Described glass powder is: bismuth glass powder, lead glass powder, vanadium glass powder, phosphate glass powder or borosilicate glass powder.
Described organosilane tackiness agent is: polysilazane, polysiloxane, Polycarbosilane or poly-boron nitrogen silane.
Beneficial effect
The method for repairing and mending of a kind of carbon pottery brake-disc coating that the present invention proposes, problem to be solved is a kind of method for repairing and mending of carbon pottery brake-disc coating, the method can effectively solve carbon pottery brake flange at equipment process floating coat damage problem.The glass coating density that adopts the method to prepare is high, technology stability good, preparation cycle is short, the antioxidant property of energy Effective Raise matrix material.Present method also is that a kind of low temperature prepares coating technology simultaneously, can be to carbon fiber reinforced carbon matrix composite material (C/C matrix material), carbon-fiber reinforced carbon, silicon carbide-based composite material (C/C-SiC matrix material) play good oxidation protection effect.
The invention has the beneficial effects as follows: play the effect of packing hole after (1) glass powder with low melting point melts, effectively stopped entering of oxygen, prevent the oxidation of carbon fiber; (2) the preparation technology of coating process is simple, and the cycle is short, cost is low, and can repair online, and is convenient and easy.
Description of drawings
Fig. 1: coating is schemed at low-temperature curing rear surface SEM;
Fig. 2: the coating sample is coatingsurface SEM figure before 700 ℃ of oxidation experiments begin;
Fig. 3: the coating sample is coating section SEM figure before 700 ℃ of oxidation experiments begin;
Fig. 4: the coating sample is at 700 ℃, oxidation coatingsurface SEM figure after 10 hours in the air;
Fig. 5: the coating sample is at 700 ℃, oxidation coating section SEM figure after 10 hours in the air;
Fig. 6: the coating sample is at 700 ℃, coatingsurface SEM figure after the thermal shock 50 times;
Fig. 7: the coating sample is at 700 ℃, coating section SEM figure after the thermal shock 50 times;
Fig. 8: the oxidation dynamic curve of coating sample.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
Embodiment 1:
Step 1: adopt clear water to carry out ultrasonic cleaning 30 minutes for carbon pottery brake flange material to be repaired, then place in 100 ℃ of baking ovens and dried through 30 minutes, stand-by;
Step 2: the ethanol that adds 80-100% with B-Si glass powder as solvent, add 15-25% polysilazane as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 3: the slurry that mixes is brushed in substrate surface, made its curing about 120 ℃ (scenes can adopt infrared lamp irradiation) through 5-6 hour, thereby obtain undercoat;
Step 4: the ethanol that adds 80-100% with Bi glass powder as solvent, add 15-25% polysilazane as tackiness agent, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 5: the slurry that mixes is brushed on the undercoat of step 2,3 preparations, through 5-6 hour it is solidified fully about 120 ℃ (the infrared lamp irradiation can be adopted in the scene), can obtain inter coat;
Step 6: the ethanol that adds 80-100% with Pb glass powder as solvent, add 15-25% polysilazane as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 7: the slurry that mixes is brushed on the inter coat of step 4,5 preparations, through 10-12 hour it is solidified fully about 120 ℃ (the infrared lamp irradiation can be adopted in the scene), thereby obtain external coating (EC);
To the coating sample that prepared with without the coating sample with carry out oxidation experiment, it is about 0.19% that the result is presented at 1 hour coating sample weightlessness of 700 ℃ of insulations, and the sample weightlessness that does not add coating is 16.19%, 10 hours coating sample weightlessness of 700 ℃ of insulations is 5.10%, and the sample weightlessness that does not add coating is 41.5%, has shown that thus this scheme can play good anti-oxidation effect to matrix.Through 700 ℃ * 3min ← → 50 real thermal shock tests of room temperature * 2min (amount to oxidation 150min), oxidative mass loss is 1.60%, it is complete that coating keeps, and do not have obvious crackle and peel off, and shows that coating has preferably heat-shock resistance.
Embodiment 2:
Step 1: adopt clear water to carry out ultrasonic cleaning 30 minutes for carbon pottery brake flange material to be repaired, then place in 100 ℃ of baking ovens and dried through 30 minutes, stand-by;
Step 2: the ethanol that adds 80-100% take B-Si glass powder as solvent, the polysiloxane that adds 15-25% and polysilazane (mass ratio was as 1: 1) as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 3: the slurry that mixes is brushed in substrate surface, made its curing about 120 ℃ (scenes can adopt infrared lamp irradiation) through 5-6 hour, thereby obtain undercoat;
Step 4: add the ethanol of 80-100% as tackiness agent, ball milling is 10-15min approximately as solvent, the polysiloxane that adds 15-25% and polysilazane (mass ratio was as 1: 1) take Bi glass powder, the slurry that obtains mixing;
Step 5: the slurry that mixes is brushed on the undercoat of step 2,3 preparations, through 5-6 hour it is solidified fully about 120 ℃ (the infrared lamp irradiation can be adopted in the scene), can obtain inter coat;
Step 6: the ethanol that adds 80-100% take Pb glass powder as solvent, the polysiloxane that adds 15-25% and polysilazane (mass ratio was as 1: 1) as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 7: the slurry that mixes is brushed on the inter coat of step 4,5 preparations, through 10-12 hour it is solidified fully about 120 ℃ (the infrared lamp irradiation can be adopted in the scene), thereby obtain external coating (EC);
To the coating sample that prepared with without the coating sample with carry out oxidation experiment, it is about 0.40% that the result is presented at 450 ℃ of oxidations, 10 little coating sample weightlessness, and the sample weightlessness that does not add coating is 1.14%.
Embodiment 3:
Step 1: adopt clear water to carry out ultrasonic cleaning 30 minutes for carbon pottery brake flange material to be repaired, then place in 100 ℃ of baking ovens and dried through 30 minutes, stand-by;
Step 2: the ethanol that adds 80-100% with B-Si glass powder as solvent, add 20% Polycarbosilane as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 3: the slurry that mixes is brushed in substrate surface, made its curing about 120 ℃ (scenes can adopt infrared lamp irradiation) through 5-6 hour, thereby obtain undercoat;
Step 4: the ethanol that adds 80%-100% with Pb glass powder as solvent, add 20% Polycarbosilane as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 5: the slurry that mixes is brushed on the undercoat of step 2,3 preparations, through 10-12 hour it is solidified fully about 120 ℃ (the infrared lamp irradiation can be adopted in the scene), thereby obtain external coating (EC);
To the coating sample that prepared with without the coating sample with carry out oxidation experiment, it is about 4.30% that the result is presented at 550 ℃ of oxidations, 10 little coating sample weightlessness, and the sample weightlessness that does not add coating is 17.26%.
Embodiment 4:
Step 1: adopt clear water to carry out ultrasonic cleaning 30 minutes for carbon pottery brake flange material to be repaired, then place in 100 ℃ of baking ovens and dried through 30 minutes, stand-by;
Step 2: the ethanol that adds 80-100% take B-Si glass powder as solvent, the polysiloxane that adds 15-25% and polysilazane (mass ratio was as 1: 1) as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 3: the slurry that mixes is brushed in substrate surface, made its curing about 120 ℃ (scenes can adopt infrared lamp irradiation) through 5-6 hour, thereby obtain undercoat;
Step 4: the ethanol that adds 80-100% take Bi glass powder as solvent, the polysiloxane that adds 15-25% and polysilazane (mass ratio was as 1: 1) as tackiness agent, add the aluminium hydroxide of 15-25% as solid filling, ball milling is 10-15min approximately, the slurry that obtains mixing;
Step 5: the slurry that mixes is brushed on the undercoat of step 2,3 preparations, through 10-12 hour it is solidified fully about 120 ℃ (the infrared lamp irradiation can be adopted in the scene), thereby obtain external coating (EC).

Claims (4)

1.一种碳陶刹车盘涂层的修补方法,其特征在于修补步骤如下:1. A method for repairing a carbon ceramic brake disc coating, characterized in that the repair steps are as follows: 步骤1:采用清水将待修补的碳陶刹车盘进行超声清洗20~30分钟,然后置于100℃烘箱内经20~30分钟烘干;Step 1: Use clean water to ultrasonically clean the carbon ceramic brake disc to be repaired for 20-30 minutes, and then place it in an oven at 100°C for 20-30 minutes to dry; 步骤2:将软化点为650~750℃的玻璃粉、溶剂、有机硅烷和固态填充物混合,经球磨得到混合均匀的浆料;然后将浆料刷涂于受损涂层处,80~120℃低温下使其固化,获得内涂层;所述玻璃粉︰溶剂︰有机硅烷︰固态填充物的质量比为3~4:3~4:1~1.5:1~1.5Step 2: Mix glass powder with a softening point of 650~750°C, solvent, organosilane and solid filler, and ball mill to obtain a uniformly mixed slurry; then brush the slurry on the damaged coating, 80~120 It is cured at a low temperature to obtain an inner coating; the mass ratio of the glass powder: solvent: organosilane: solid filler is 3~4:3~4:1~1.5:1~1.5 步骤3:将软化点为450~550℃的玻璃粉、溶剂、有机硅烷混合,经球磨得到混合均匀的浆料;然后将浆料刷涂于内涂层上,80~120℃下使其固化,得到中间涂层;所述玻璃粉︰溶剂︰有机硅烷的质量比为3~4:3~4:1~1.5Step 3: Mix glass powder with a softening point of 450~550°C, solvent, and organosilane, and ball mill to obtain a uniformly mixed slurry; then brush the slurry on the inner coating, and cure it at 80~120°C , to obtain an intermediate coating; the mass ratio of the glass powder: solvent: organosilane is 3 ~ 4:3 ~ 4:1 ~ 1.5 步骤4:将软化点为350~400℃的玻璃粉、溶剂、有机硅烷和固态填充物混合,经球磨得到混合均匀的浆料;然后将浆料刷涂于中间涂层上,80~120℃下使其固化,得到外涂层;所述玻璃粉、溶剂、有机硅烷和固态填充物的质量比为3~4:3~4:1~1.5:1~1.5Step 4: Mix glass powder with a softening point of 350~400°C, solvent, organic silane and solid filler, and ball mill to obtain a uniformly mixed slurry; then brush the slurry on the intermediate coating, 80~120°C Make it solidify under, obtain outer coating; The mass ratio of described glass powder, solvent, organosilane and solid filler is 3~4:3~4:1~1.5:1~1.5 所述固态填充物为氢氧化铝或氧化铝。The solid filler is aluminum hydroxide or aluminum oxide. 2.根据权利要求1所述碳陶刹车盘涂层的修补方法,其特征在于:所述步骤2、步骤3和步骤4中的固化采用红外灯照射使其固化。2. The method for repairing the carbon-ceramic brake disc coating according to claim 1, characterized in that: said step 2, step 3 and step 4 are cured by irradiation with an infrared lamp. 3.根据权利要求1所述碳陶刹车盘涂层的修补方法,其特征在于:所述玻璃粉为:铋玻璃粉、铅玻璃粉、钒玻璃粉、磷酸盐玻璃粉或硼硅酸盐玻璃粉。3. The method for repairing the carbon-ceramic brake disc coating according to claim 1, wherein the glass powder is: bismuth glass powder, lead glass powder, vanadium glass powder, phosphate glass powder or borosilicate glass pink. 4.根据权利要求1所述碳陶刹车盘涂层的修补方法,其特征在于:所述有机硅烷为:聚氮硅烷、聚硅氧烷、聚碳硅烷或聚硼氮硅烷。4 . The method for repairing the carbon ceramic brake disc coating according to claim 1 , wherein the organosilane is: polyazidosilane, polysiloxane, polycarbosilane or polyboronazide silane.
CN 201110372669 2011-11-21 2011-11-21 Repairing method of carbon ceramic brake-disc coating Expired - Fee Related CN102491783B (en)

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CN103601528B (en) * 2013-08-30 2015-05-27 航天材料及工艺研究所 Local coating defect repairing method for carbon/carbon composite material
CN103804030A (en) * 2013-12-27 2014-05-21 西北工业大学 Method for preparing oxidation-resistant composite coating for carbon ceramic brake disc
CN109665866B (en) * 2019-01-22 2021-09-21 长安大学 Outfield repairing method for low-temperature 450-1100 ℃ coating in C/C aircraft brake material
CN110721881B (en) * 2019-11-04 2021-10-15 中国人民解放军国防科技大学 A high-temperature radar and infrared compatible stealth coating on-site repair method
CN112745146B (en) * 2021-01-11 2022-07-12 上海大学 A local defect whisker or flake-like reinforcement repair method for carbon/carbon composite coating and repair coating
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