CN1948779A - Method of preparing C/C composite material anti oxidation prtective coating for aeroplane brake disk - Google Patents
Method of preparing C/C composite material anti oxidation prtective coating for aeroplane brake disk Download PDFInfo
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- CN1948779A CN1948779A CN 200610089618 CN200610089618A CN1948779A CN 1948779 A CN1948779 A CN 1948779A CN 200610089618 CN200610089618 CN 200610089618 CN 200610089618 A CN200610089618 A CN 200610089618A CN 1948779 A CN1948779 A CN 1948779A
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Abstract
The inventive preparation method consists in: preparing c/c composite material by using rapid directional diffusion chemical vapor penetrating technique; preparing a double-layer coating, first, the preparation of the inner coating being a boric acid basic coating is that: preparing 30-40 mass percent solution in the condition of heating boric acid and absolute ethyl alcohol in 60-80 deg. C water bath, then being coated on the material surface uniformly and at last being sintered in 700-800 deg. C high temperature to make up an inner coating; second, the raw material for the outer coating are (wt%) boron powder 10-14, ground quartz 25-31, high-temp. resin 45-55, aluminate powder and iron powder 5, coating slurry on the prepared material for the inner coating uniformly and then being sintered in about 400-500 deg. C temperature to make up the products. The prepared material is washed in an ultrasonic cleaner.
Description
(1) technical field:
The invention provides the new method of a kind of aeroplane brake discs, belong to the carbon/carbon compound material technical field with the protection against oxidation coating preparation of C/C composite material.
(2) background technique:
Carbon/carbon (C/C) composite material that carbon fiber strengthens base makes it obtain using widely at aerospace field with its excellent high-temperature mechanical property, for example some heat resistant structure parts of the wing of nose of thermal shield, space shuttle and aircraft particularly have extremely unique advantage when the material of using as aeroplane brake discs.In inert gas atmosphere, the C/C composite material can both keep its mechanical property at 2000 ℃, yet if without any protection against oxidation, C/C composite material even under 400 ℃ temperature, all serious oxidation can take place.The anti-oxidation approach of C/C composite material has two kinds: a kind of is to add anti-oxidizing agent to improve the method for matrix anti-aging capability in the C/C matrix; Another is to coat the method for one deck coating with barrier material and air at material surface.Under the prerequisite that does not influence the matrix mechanical property, second method is best anti-oxidation approach.At present, advanced cladding technique is that coating is prepared into composite coating, and it generally comprises oxygen barrier bed, functional activity layer and adhesive layer.Wherein the oxygen barrier bed is anti-oxidation effective layer, and the functional activity layer plays a part the packing crackle, and adhesive layer then is to play a part to reduce thermal expansion coefficient degree of not matching between carbon base body and the outer coating.
Since 1934, the research of C/C composite material antioxidation has had development at full speed, anti-oxidation method is progressive and perfect constantly, but present inoxidzable coating ubiquity preparation cost is higher, coating bond is not high enough, the crackle self-healing ability is strong inadequately and problem that can not reparation property.Particularly concerning aeroplane brake discs was used the C/C composite material, the problem of these aspects had to be solved especially.
(3) summary of the invention:
A kind of aeroplane brake discs of the present invention new method of the protection against oxidation coating preparation of C/C composite material; its main purpose provides lower, easy adhesion of a kind of preparation cost and recoverable double-deck inoxidzable coating; this coating is even compact very; and adhesive strength is higher; after 700 ℃ of constant temperature oxidations 100 hours (h), oxidative mass loss is almost nil.
A kind of aeroplane brake discs of the present invention new method of the protection against oxidation coating preparation of C/C composite material, its technological scheme is divided into following a few part: the preparation of C/C material, the preparation of internal layer coating, the preparation of outer coating.The concrete implementation step of scheme as shown in Figure 1.
(1) preparation of C/C material
This used material of the present invention is to adopt the prepared new two-dimentional C/C composite material of rapid orientation diffusion chemical vapor infiltration (RDD CVI) technology, and its density is 1.75g/cm
3It is 15 * 15 * 15mm that the C/C material is all made specification
3Shape, and to the surface treatment of its chamfering of polishing.
(2) preparation method of coating
Among the present invention coated designs is become duplex coating, preparation in two steps: 1. the internal layer coating is the boronate coating, making mass fraction by boric acid (Powdered) and anhydrous alcohol (analyzing pure) under the condition of 60 ℃ ~ 80 ℃ water-bath heating earlier is 30% ~ 40% colourless solution, evenly be coated in material surface then, make the internal layer coating at 700 ~ 800 ℃ of high temperature sinterings at last.2. the used raw material of outer coating is boron powder, quartz flour, high-temperature resin and aluminium powder and iron powder, and the mass percent of each composition and other parameters are as shown in table 1.Slip evenly is coated on the material that has prepared the internal layer coating with brush, 400 ~ 500 ℃ of left and right sides sintering are made finished product then.The material of making cleans with Ultrasonic Cleaners.
The proportioning of each material of table 1 outer layer coating
| Raw material | Content (wt%) | Purity (%) | Granularity (order) | Specification |
| Boron konilite powder high-temperature resin aluminium | 10~14 25~31 45~55 5 5 | ≥99 ≥98 ≥96 ≥99 ≥99 | 400 400 - 325 325 | The chemical pure chemistry is pure--- |
Annotate: wt% represents mass percent in the table
A kind of aeroplane brake discs of the present invention new method of the protection against oxidation coating preparation of C/C composite material; its advantage is: lower, easy adhesion of preparation cost and recoverable double-deck inoxidzable coating; this coating is even compact very; and adhesive strength is higher; after 700 ℃ of constant temperature oxidations 100 hours (h), oxidative mass loss is almost nil.
(1) material for preparing coating carries out 600 ℃, 700 ℃, 800 ℃, 900 ℃ constant temperature static oxidation experiment respectively in tube type resistance furnace, its oxidation weight loss plotted curve as shown in Figure 2, coating is not having oxidation weight loss substantially below 700 ℃.By coating shown in Figure 3 ESEM (SEM) microscopic appearance figure before and after 700 ℃ of following oxidation 100h as can be known, the oxidation Front-coating mirror is even compact very in addition, and coating becomes more fine and close after the oxidation, and coating has certain self-healing ability.And the serviceability temperature of general aeroplane brake discs is below 600 ℃, so this coating is well positioned to meet the usage requirement of aeroplane brake discs.
(2) material is after 40 ~ 60 times the thermal shock experiment of circulating under 700 ℃, and recording material weight-loss ratio after this thermal cycle is-0.11%, and thermal shock resistance is very good, can adapt to the repeatedly requirement of thermal cycle in the aeroplane brake discs using process.
(3) material is placed on the Ultrasonic Cleaners cleans 5h with clear water, dry back does not have the phenomenon that comes off with observation by light microscope and occurs, and Bond Strength of Coating is better, can resist the impact of air blast in the aeroplane brake discs using process.
(4) description of drawings:
Fig. 1. the implementation step of technological scheme
Fig. 2. the oxidation weight loss curve of material
ESEM (SEM) the microscopic appearance figure of Fig. 3 a. material before oxidation
ESEM (SEM) the microscopic appearance figure of Fig. 3 b. material behind 700 ℃ of oxidation 100h
Fig. 4. the new temperature program of internal layer coating preparation
Fig. 5. the new temperature program of outer coating preparation
Symbol description:
A.T is a Kelvin temperature, and unit is Kelvin (K);
B.t is the time, and unit is h;
C.m/m
0Be the oxidation weight loss percentaeg, wherein m is the residual mass after the oxidation, m
0It is the original quality of material.
(5) embodiment:
A kind of aeroplane brake discs of the present invention new method of the protection against oxidation coating preparation of C/C composite material, its process step is as follows:
(1) preparation of C/C material:
The used material of the present invention adopts the prepared new two-dimentional C/C composite material of RDD CVI technology, and its density is 1.75g/cm
3The specification of all making of experiment material therefor is 15 * 15 * 15mm
3Shape, use the emery paper hand sand of 400 coarse sands then, make it have certain roughness, and with its chamfering, and with anhydrous alcohol as solvent Ultrasonic Cleaners cleaning material, and then material put into drying oven, take out 5 hours (h) backs of freeze-day with constant temperature under 100 ℃ condition, in order to applying coating.
(2) preparation method of coating:
The present invention becomes duplex coating with coated designs, in two steps preparation:
1. the preparation method of internal layer coating:
Measure the boric acid (Powdered) of 30 ~ 40g with electronic balance, and measure the anhydrous alcohol of 70 ~ 80ml volume with graduated cylinder, and be solvent with the anhydrous alcohol, under 60 ℃ condition of water bath heating, boric acid is dissolved in the anhydrous alcohol, stir with glass rod, be configured to 30% ~ 40% colourless solution.
With brush the internal layer solution that has prepared is coated on the material uniformly, treats that it dries naturally, repeat 4 ~ 5 times, the powder that one deck white is arranged until its surface is for best.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 4 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, with the protection matrix.
2. the preparation method of outer coating:
On the material of existing internal layer coating, the surface coating material that has prepared is coated on the material uniformly, treats that it dries 5 ~ 6h naturally, repeat 2 ~ 3 times with brush.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 5 temperature program.When temperature is higher than 300 ℃, charge into nitrogen therebetween, with the protection matrix.
Embodiment one: a kind of compound inoxidzable coating of the present invention is the new method according to following process preparation:
The preparation of a.C/C material:
It is 15 * 15 * 15mm that material is made specification
3Shape, use emery paper hand sand, the chamfering of 400 coarse sands then, and with anhydrous alcohol as solvent Ultrasonic Cleaners cleaning material, and then material put into drying oven, taking out behind the dry 5h under 100 ℃ the condition, in order to applying coating.
B. internal layer coating preparation:
Under 60 ℃ condition of water bath heating, be configured to 30% colourless solution, 50 grams with boric acid (Powdered) and anhydrous alcohol.With brush the internal layer solution that has prepared is coated on the material uniformly then, treats that it dries naturally, repeat 5 times.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 1 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, to protect the coating of not moulding.
C. the preparation of outer coating:
Outer coating is made up of the raw material of the mass percent of following each composition: boron powder 10%, quartz flour 25%, high-temperature resin 55%, aluminium powder 5%, iron powder 5%.The coating gross weight is 100g.It is fully stirred evenly the outer layer coating that is made into the black thick liquid.
On the material of existing internal layer coating, the surface coating material that has prepared is coated on the material uniformly, treats that it dries 5h naturally, repeat 2 times with brush.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 2 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, with the protection matrix.
Embodiment two: a kind of compound inoxidzable coating of the present invention is the new method according to following process preparation:
The preparation of a.C/C material:
It is 15 * 15 * 15mm that material is made specification
3Shape, use emery paper hand sand, the chamfering of 400 coarse sands then, and with anhydrous alcohol as solvent Ultrasonic Cleaners cleaning material, and then material put into drying oven, taking out behind the dry 5h under 100 ℃ the condition, in order to applying coating.
B. internal layer coating preparation:
Under 70 ℃ condition of water bath heating, be configured to 35% colourless solution, 50 grams with boric acid (Powdered) and anhydrous alcohol.With brush the internal layer solution that has prepared is coated on the material uniformly then, treats that it dries naturally, repeat 5 times.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 1 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, to protect the coating of not moulding.
C. the preparation of outer coating:
Outer coating is made up of the raw material of the mass percent of following each composition: boron powder 12%, quartz flour 28%, high-temperature resin 50%, aluminium powder 5%, iron powder 5%.The coating gross weight is 100g.It is fully stirred evenly the outer layer coating that is made into the black thick liquid.
On the material of existing internal layer coating, the surface coating material that has prepared is coated on the material uniformly, treats that it dries 6h naturally, repeat 2 times with brush.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 2 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, with the protection matrix.
Embodiment three: a kind of compound inoxidzable coating of the present invention is the new method according to following process preparation:
The preparation of a.C/C material:
It is 15 * 15 * 15mm that material is made specification
3Shape, use emery paper hand sand, the chamfering of 400 coarse sands then, and with anhydrous alcohol as solvent Ultrasonic Cleaners cleaning material, and then material put into drying oven, taking out behind the dry 5h under 100 ℃ the condition, in order to applying coating.
B. internal layer coating preparation:
Under 80 ℃ condition of water bath heating, be configured to 40% colourless solution, 50 grams with boric acid (Powdered) and anhydrous alcohol.With brush the internal layer solution that has prepared is coated on the material uniformly then, treats that it dries naturally, repeat 6 times.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 1 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, to protect the coating of not moulding.
C. the preparation of outer coating
Outer coating is made up of the raw material of the mass percent of following each composition: boron powder 14%, quartz flour 31%, high-temperature resin 45%, aluminium powder 5%, iron powder 5%.The coating gross weight is 100g.It is fully stirred evenly the outer layer coating that is made into the black thick liquid.
On the material of existing internal layer coating, the surface coating material that has prepared is coated on the material uniformly, treats that it dries 5h naturally, repeat 2 times with brush.
The material that coats internal layer packed into burn in the boat, put into tube type resistance furnace, heat to material according to as shown in Figure 2 temperature program.When temperature is higher than 300 ℃, pour nitrogen therebetween, with the protection matrix.
Claims (1)
1, a kind of aeroplane brake discs new method of the protection against oxidation coating preparation of C/C composite material, it is characterized in that: the process step of its preparation method is as follows:
(1) preparation of C/C material:
This used material of the present invention is to adopt the prepared new two-dimentional C/C composite material of rapid orientation diffusion chemical vapor infiltration (RDD CVI) technology, and its density is 1.75g/cm
3It is 15 * 15 * 15mm that the C/C material is all made specification
3Shape, and to the surface treatment of its chamfering of polishing;
(2) preparation method of coating:
Among the present invention coated designs is become duplex coating, preparation in two steps: 1. the internal layer coating is the boronate coating, making mass fraction by boric acid (Powdered) and anhydrous alcohol (analyzing pure) under the condition of 60 ℃～80 ℃ water-bath heating earlier is 30%～40% colourless solution, evenly be coated in material surface then, make the internal layer coating at 700～800 ℃ of high temperature sinterings at last; 2. the used raw material of outer coating is boron powder, quartz flour, high-temperature resin and aluminium powder and iron powder, shown in the mass percent proportioning of each composition and the following tabulation 1 of other parameters:
Table 1
Raw material The quality percentage composition Purity Granularity Specification
Boron konilite powder high-temperature resin aluminium powder iron powder 10～14％ 25～31％ 45～55％ 5％ 5％ ≥99％ ≥98％ ≥96％ ≥99％ ≥99％ 400 order 400 orders-325 orders, 325 orders The chemical pure chemistry is pure---
Slip evenly is coated on the material that has prepared the internal layer coating with brush, 400～500 ℃ of left and right sides sintering are made finished product then, and the material of making cleans with Ultrasonic Cleaners.
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| CNB2006100896185A CN100424375C (en) | 2006-07-06 | 2006-07-06 | Method of preparing C/C composite material anti oxidation prtective coating for aeroplane brake disk |
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| CNB2006100896185A CN100424375C (en) | 2006-07-06 | 2006-07-06 | Method of preparing C/C composite material anti oxidation prtective coating for aeroplane brake disk |
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| CN100424375C CN100424375C (en) | 2008-10-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911599A (en) * | 2012-10-26 | 2013-02-06 | 中国第一汽车股份有限公司 | Heat-resisting protection coating applied to off-road vehicle parts such as brake disc |
| CN104312223A (en) * | 2014-10-09 | 2015-01-28 | 孟红琳 | Preparation method of protective layer of aviation brake disc |
| CN104448957A (en) * | 2014-10-30 | 2015-03-25 | 苏州莱特复合材料有限公司 | Method for preparing SiC powder-based protective layer for C/C brake block |
| CN106966765A (en) * | 2016-06-12 | 2017-07-21 | 北京航空航天大学 | Thermostructural composite long-life composite coating and preparation method thereof |
| CN110922796A (en) * | 2019-12-16 | 2020-03-27 | 浙江名鹰合金材料有限公司 | Wear-resistant coating for graphite boat plate and preparation process thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1025575C (en) * | 1990-12-26 | 1994-08-03 | 华兴航空机轮公司 | High-temp. anti-oxydation coating of carbon/carbon composition braking wheel |
| CN1164689C (en) * | 2002-09-09 | 2004-09-01 | 西安兰空航空设备公司 | Coating of guarding against oxidation for carbon/carbon brake disc in airplane and its coating technique |
| CN100340791C (en) * | 2003-11-24 | 2007-10-03 | 西安超码科技有限公司 | Method for preventing oxidization of carbon-carbon composite material |
| CN1237121C (en) * | 2003-11-24 | 2006-01-18 | 西安航天复合材料研究所 | Carbon/carbon composite material anti-oxydation coating |
-
2006
- 2006-07-06 CN CNB2006100896185A patent/CN100424375C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911599A (en) * | 2012-10-26 | 2013-02-06 | 中国第一汽车股份有限公司 | Heat-resisting protection coating applied to off-road vehicle parts such as brake disc |
| CN104312223A (en) * | 2014-10-09 | 2015-01-28 | 孟红琳 | Preparation method of protective layer of aviation brake disc |
| CN104448957A (en) * | 2014-10-30 | 2015-03-25 | 苏州莱特复合材料有限公司 | Method for preparing SiC powder-based protective layer for C/C brake block |
| CN106966765A (en) * | 2016-06-12 | 2017-07-21 | 北京航空航天大学 | Thermostructural composite long-life composite coating and preparation method thereof |
| CN110922796A (en) * | 2019-12-16 | 2020-03-27 | 浙江名鹰合金材料有限公司 | Wear-resistant coating for graphite boat plate and preparation process thereof |
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| CN100424375C (en) | 2008-10-08 |
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Assignee: Jiangsu Tianniao High Technology Co., Ltd. Assignor: Beihang University Contract record no.: 2011990000460 Denomination of invention: Method for preparing oxidation resistant protective coating of C/C composite for aircraft brake disc Granted publication date: 20081008 License type: Exclusive License Open date: 20070418 Record date: 20110615 |