CN106087112B - A kind of preparation method of continuous SiC fiber of the surface with carbon-coating - Google Patents
A kind of preparation method of continuous SiC fiber of the surface with carbon-coating Download PDFInfo
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- CN106087112B CN106087112B CN201610571309.5A CN201610571309A CN106087112B CN 106087112 B CN106087112 B CN 106087112B CN 201610571309 A CN201610571309 A CN 201610571309A CN 106087112 B CN106087112 B CN 106087112B
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- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
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- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/10—Chemical after-treatment of artificial filaments or the like during manufacture of carbon
- D01F11/16—Chemical after-treatment of artificial filaments or the like during manufacture of carbon by physicochemical methods
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Abstract
The present invention provides a kind of preparation method of continuous SiC fiber of the surface with carbon-coating, and this method is uniform by controlling the continuous SiC fiber carbon layer on surface thickness that temperature program, sintering temperature, soaking time and vacuum degree in sintering process are prepared.
Description
Technical field
The present invention relates to continuous SiC fiber technical fields, are specifically related to a kind of continuous SiC fiber of the surface with carbon-coating
Preparation method.
Background technology
Continuous SiC fiber has high intensity, high-modulus, high temperature resistant, anti-oxidant, creep resistant, corrosion-resistant etc. a series of excellent
Performance, can be used for the fiber reinforcement of the matrixes such as metal, resin, ceramics, high-performance composite materials are prepared, in aviation
The fields such as space flight, weaponry and nuclear industry are with a wide range of applications.Northeastern Japan university professor Yajima develops earliest
Go out precursor pyrolysis and hot pressing and prepares high-performance continuous SiC fiber (Yajima S, Hasegawa Y, Okamura K, Matsuzawa
T,Development of high tensile strength silicon carbide fiber using an
organosilicon polymer precursor.Nature,1978,273:525-527.), typical preparation flow is：
By organosilicon polymer Pintsch process, reset polycondensation reaction prepare Polycarbosilane (PCS) be used as precursor, then by PCS according to
Continuous SiC fiber is prepared through melt spinning, cure treatment, the pyrolysis technical process such as inorganization in sequence.Currently, continuous SiC
Fiber has been realized in industrialized production, and the SiC ceramic matrix composite material enhanced by continuous SiC fiber has been widely used in aviation
The fields such as heat-resistant part, the nuclear reactor material of airspace engine.
Carbon coating is prepared on continuous SiC fiber surface, helps to further increase the intensity of continuous SiC fiber, improve fibre
The interface of dimension and matrices of composite material, and the low-fiber resistivity of drop.A kind of use is disclosed in CN201310085507.7
The method that chemical vapour deposition technique (CVD method) prepares the continuous SiC fiber of surface richness carbon structure, by high temperature process furnances both ends
Sealing gland is carried out using inert atmosphere, and is passed through the gaseous mixture of gaseous alkanes and inert gas on the inside of arrival end sealing gland, makes poly- carbon
Silane fusion-free fibre realizes surface deposited carbon layer during high temperature pyrolysis.A kind of skin is disclosed in patent CN02140433.X
Core bicomponent fibre method prepares the production technology of continuous carbofrax fibre, and high molecular polymer dissolving is made in a solvent first
Then dispersant, high molecular polymer, SiC powder, sintering aid are dissolved or dispersed in solvent and core liquid are made by skin liquid, will
Skin liquid and core liquid squeeze out from the micropore of core-sheath spinning pack, solidification, stretch, obtain fibrinogen after drying under stress.It will
Low-temperature oxidation is handled fibrinogen in air, argon gas atmosphere high temperature be sintered to obtain core is SiC fibers and skin zone is carbon
Continuous fiber.It is disclosed in patent CN201380026420.0 using the aqueous acid containing hydrofluoric acid and nitric acid, but without acetic acid
Solution is chemically treated SiC fibers, to remove the silica for being present in fiber surface, and formed≤100nm
Microporous carbonaceous layer.
By above in the prior art method therefor it is found that with prior arts such as CVD method, sheath-core bicomponent method and etching methods
Carbon-coating is prepared in SiC fiber surfaces, process conditions are complicated, and are difficult that control fiber surface is formed by carbon-coating uniformity, therefore,
The serious industrialized production for constraining continuous SiC fiber of the surface with carbon-coating and application.
Invention content
The purpose of the present invention is to provide the preparation method that a kind of surface has the continuous SiC fiber of carbon-coating, the invention solutions
The prior art of having determined prepares carbon-coating in SiC fiber surfaces, and process conditions are complicated, and is difficult to control SiC fiber surfaces and is formed by
The technical issues of carbon-coating uniformity.
The present invention provides a kind of preparation method of continuous SiC fiber of the surface with carbon-coating, includes the following steps：It will be inorganic
Heat preservation 0.5~10 after SiC fibers are warming up to 1300 DEG C or more in vacuum environment according to 150~600 DEG C/h of heating rate
Hour, surface, which is made, has the SiC fibers of carbon-coating.
Further, the vacuum degree of vacuum environment is less than 1.01 × 105Pa。
Further, it refers to being warming up to 1300~1900 DEG C to be warming up to 1300 DEG C or more.
Further, heating rate is 200~500 DEG C/h.
Further, the preparation of inorganic SiC fibers includes the following steps：The fusion-free fibre that will be prepared by PCS polymer
Under gaseous environment, 1000~1500 DEG C are risen to according to 50~200 DEG C/h of heating rate, keeps the temperature 0.5~2 hour, system
；Gas is the group of one or any kind of composition in nitrogen, argon gas, helium, hydrogen or ammonia.
It is fine that another aspect of the present invention additionally provides a kind of continuous SiC of the surface that the above method is prepared with carbon-coating
Dimension, there are carbon-coatings on continuous SiC fiber surface.
Further, the thickness of carbon-coating is 1nm~4.5 μm.
Compared with the prior art, technique effect of the invention：
1, surface provided by the invention has the preparation method of the continuous SiC fiber of carbon-coating, by controlling in sintering process
Temperature program and the thickness of continuous SiC fiber carbon layer on surface for preparing of sintering temperature, soaking time and vacuum degree 1nm~
4.5 μm a wide range of interior adjustable, and the thickness of the formed carbon-coating of the fiber surface is uniform, no protrusion or other polymorphic structures, and
And be tightly combined with fiber core, to ensure that finally obtained continuous SiC fiber still maintains good mechanical property, ginseng
See attached drawing 3.
2, surface provided by the invention has the preparation method of the continuous SiC fiber of carbon-coating, the routine prepared using fiber
Equipment can be implemented, it is easy to accomplish being produced into for continuous SiC fiber of the surface with carbon-coating can be greatly lowered in industrialized production
This.
3, surface provided by the invention has the preparation method of the continuous SiC fiber of carbon-coating, simple process, easy to operate,
It is low to be easily industrialized production, manufacturing cost, obtained continuous SiC fiber mechanical property and heat resistance are good, and surface has
There is carbon-coating.
4, surface provided by the invention has the continuous SiC fiber of carbon-coating, and there are thickness to be continuously adjusted for the fiber surface
Carbon-coating so that the fiber has excellent mechanical property, and has excellent heat resistance.
Specifically please refer to the various realities that the preparation method of continuous SiC fiber of the surface according to the present invention with carbon-coating proposes
The described below of example is applied, it will be apparent in terms of the above and other for making the present invention.
Description of the drawings
Fig. 1 is that the cross-sectional scans Electronic Speculum for the inorganic SiC fibers being prepared in 1 step of the preferred embodiment of the present invention (1) is shone
Piece (SEM)；
Fig. 2 is the inorganic SiC fibers that are prepared in step (1) in the preferred embodiment of the present invention 1 from fiber surface to fibre core
The element distribution plots schematic diagram in portion；
Fig. 3 is the cross-sectional scans that the surface being prepared in the preferred embodiment of the present invention 1 has the continuous SiC fiber of carbon-coating
Electromicroscopic photograph；
Fig. 4 is that the surface for preparing has the continuous SiC fiber of carbon-coating from fiber surface to fibre in the preferred embodiment of the present invention 1
Tie up the element distribution plots schematic diagram of core；
Fig. 5 is to be dropped after the continuous SiC fiber being prepared in comparative example 1 keeps the temperature 1 hour in argon gas atmosphere at 1800 DEG C
To the surface scan electromicroscopic photograph of room temperature.
Specific implementation mode
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.
Surface provided by the invention has the preparation method of the continuous SiC fiber of carbon-coating, includes the following steps：It will be inorganic
Heat preservation 0.5~10 after SiC fibers are warming up to 1300 DEG C or more in vacuum environment according to 150~600 DEG C/h of heating rate
Hour, the surface, which is made, has the SiC fibers of carbon-coating.
Method provided by the invention passes through the temperature program in the sintering process to inorganic SiC fibers, sintering temperature, heat preservation
Time and vacuum degree are controlled, by SiC fibers oxygen and element silicon remove from outside to inside, to surplus in fiber surface
Carbon has been descended, the continuous SiC fiber that there is uniform and thickness to be continuously adjusted carbon-coating on surface has been made.And the continuous SiC of gained
Fiber also has good mechanical property and heat resistance.This method by controlling soaking time under vacuum conditions, in target
Temperature enables to SiC fibers to become fiber C under (being more than 1300 DEG C), in the extreme case, is equivalent to carbon layer on surface
Thickness be exactly the fiber radius.
Inorganic SiC fibers herein refer to PCS fusion-free fibres after organic-inorganic converts, mainly by SiC, freedom
Carbon and SiCxOyThe SiC fibers of amorphous equal composition.It can be prepared into for commercial product or by existing conventional method
It arrives.
Preferably, vacuum degree is less than 1.01 × 105Pa.At this time with the reduction of vacuum degree, oxygen in inorganic SiC fibers and
The removing speed of element silicon is accelerated, and easier can form carbon-coating in fiber surface.By controlling vacuum degree in the range, energy
Preferably the oxygen of SiC fiber sheaths and element silicon are removed, to form thicker carbon-coating.
Preferably, it refers to being warming up to 1300~1900 DEG C to be warming up to 1300 DEG C or more.After being warming up to the temperature, it can be conducive to
Formed carbon-coating reinforces the mechanical property of gained fiber.
Preferably, heating rate is 200~500 DEG C/h.The resistance to of gained fiber can be further increased by the heating of this rate
Warm nature energy.
Preferably, the preparation of inorganic SiC fibers includes the following steps：The fusion-free fibre prepared by PCS polymer is existed
Under gaseous environment, 1000~1500 DEG C are risen to according to 50~200 DEG C/h of heating rate, keeps the temperature 0.5~2 hour, is made；
Gas is the group of one or any kind of composition in nitrogen, argon gas, helium, hydrogen or ammonia.Inorganic SiC is prepared by this condition
Fiber, can improve the mechanical property of the inorganic SiC fibers of gained, and can regulate and control its element composition, be more advantageous to follow-up preparation
The attachment of obtained carbon-coating improves the mechanical property and high temperature resistance of final continuous SiC fiber.
PCS polymer used herein refers to the poly- carbon silicon obtained by cracking and rearrangement conversion by polydimethylsiloxane
Alkane, or pass through Polycarbosilane and ferrocene, FeCl3、AlCl3、Al(AcAc)3、Al(OR)3、B(OR)3、Ti(OR)4、Zr
(OR)4、Zr(AcAc)4The reaction of one or more of (R=Me, Et, Pt, Bt or Ph) compounds it is obtained containing Fe, Al, B,
The preceramic polymer of the Polycarbosilane of the heterogeneous elements such as Ti or Zr or other SiC ceramics containing Si and C element.When
Right PCS polymer may be commercially available such product.
The fusion-free fibre prepared herein by PCS polymer refers to first passing through melt spinning, dry method spinning by PCS polymer
PCS fibrinogens are prepared in the spinning mode such as silk, wet spinning, electrostatic spinning, and PCS fibrinogens are then placed in non-fusible place again
It manages in device, being passed through air, either reactive atmosphere is crosslinked or is crosslinked using electron beam irradiation, and non-fusible fibre is made
Dimension.
Another aspect of the present invention additionally provides a kind of continuous SiC of the surface being prepared as stated above with carbon-coating
Fiber.The fiber is as a result of above-mentioned preparation method so that the thickness of gained carbon-coating is 1nm~4.5 μm, to realize at this
It is continuously adjustable in a wide range of, and thickness is uniform, and also carbon-coating is tightly combined with SiC fiber cores, makes it have more excellent power
Performance and high temperature resistance are learned, thus gained fiber is different from existing continuous SiC fiber.
Preferably, the carbon layers having thicknesses on gained continuous SiC fiber surface are in a wide range of interior adjustable of 1nm~4.5 μm.
It is specific that this approach includes the following steps：
(1) fusion-free fibre prepared by PCS polymer is placed in graphite furnace, is passed through gas, according to 50~200 DEG C/
The heating rate of hour rises to 1000~1500 DEG C, keeps the temperature 0.5~2 hour, and inorganic SiC fibers are made；
(2) inorganic SiC fibers are placed in pyrographite stove, certain vacuum degree are evacuated to, then according to 150~600
DEG C/h heating rate rise to 1300~1900 DEG C, keep the temperature 0.5~10 hour, surface, which is made, has the SiC fibers of carbon-coating.
Further, in step (1), the gas refers to the one or several kinds in nitrogen, argon gas, helium, hydrogen, ammonia
Gaseous mixture.Certain vacuum degree refers to being less than 1.01 × 105Pa is less than a standard atmospheric pressure.
Method provided by the invention is by PCS fusion-free fibres, pass through inorganization processing, high temperature under vacuum
Firing has the continuous SiC fiber of carbon-coating to obtain surface.
Embodiment
Material and instrument used are commercially available in following embodiment.
Reference example 1
By polydimethylsiloxane under constant-pressure and high-temperature by cracking and the Polycarbosilane that conversion obtains will be reset (softening point is
215 DEG C, number-average molecular weight is 1.68 × 103G/mol, molecular weight distribution index 2.82) it is placed in the molten cylinder of melt spinning device
In, 320 DEG C are heated under nitrogen atmosphere protection, after it is melted into improving uniformity of melt completely, in 289 DEG C, 0.4MPa
Pressure under, drawing-off spinning was carried out with 400m/ minutes speed, obtains the continuous P CS fibrinogens that average diameter is 12um.It will
Fusion-free fibre is made by electron beam irradiation (electron beam line is 3mA, and total irradiation time is 9 hours) in PCS fibrinogens afterwards.
Embodiment 1
(1) fusion-free fibre prepared in reference example 1 is placed in graphite furnace, is passed through the gaseous mixture (hydrogen of nitrogen and hydrogen
The volume ratio that gas accounts for gaseous mixture is 85%), to rise to 1000 DEG C with 80 DEG C/h of heating rate, keep the temperature 1 hour, be made inorganic
SiC fibers.(2) inorganic SiC fibers are placed in pyrographite stove, are vacuumized, so that vacuum degree is reached 6Pa, then according to 300
DEG C/h heating rate rise to 1900 DEG C, keep the temperature 1 hour, surface, which is made, has the continuous SiC fiber of carbon-coating.
Fig. 1 is the cross-sectional scans electromicroscopic photograph of the inorganic SiC fibers prepared in 1 step of the embodiment of the present invention (1), can by figure
See, fibre section smooth even, fiber surface does not have apparent carbon-coating interface.
Fig. 2 is the inorganic SiC fibers that are prepared in step (1) in the embodiment of the present invention 1 from fiber surface to fiber core
Element distribution plots, as seen from the figure, although rich carbon is oxygen-enriched in the range of fiber surface 10nm, the range from 10 to 200nm
Interior, fiber composition is Silicon-rich, and therefore, the surface for further demonstrating the inorganic SiC fibers of gained does not have carbon-coating.
Fig. 3 is the cross-sectional scans electromicroscopic photograph that the surface prepared in the embodiment of the present invention 1 has the continuous SiC fiber of carbon-coating
(SEM), as seen from the figure, which has apparent interface to occur with core, illustrates that the fiber surface forms uniform carbon
Layer.
Fig. 4 is that the surface for preparing has the continuous SiC fiber of carbon-coating from fiber surface to fibre core in the embodiment of the present invention 1
The element distribution plots in portion are carbon entirely in the range of from surface to core 200nm, and the content of silicon and oxygen can almost be ignored not
Meter.It follows that formed carbon-coating in Fig. 3 continuous SiC fiber fiber surfaces, and it can be seen from figure 3 that the carbon-coating dense uniform,
About 1 μm or so of thickness.
Embodiment 2
The inorganic SiC fibers prepared in 1 step of embodiment (1) are placed in pyrographite stove, vacuumizes, vacuum degree is made to reach
To 28Pa, 1800 DEG C are risen to according to 260 DEG C/h of heating rate, keeps the temperature 1 hour, surface, which is made, has the continuous SiC of carbon-coating
Fiber.
Embodiment 3
The inorganic SiC fibers prepared in 1 step of embodiment (1) are placed in pyrographite stove, vacuumizes, vacuum degree is made to reach
To 350Pa, 1700 DEG C are risen to according to 230 DEG C/h of heating rate, keeps the temperature 2 hours, surface, which is made, has the continuous of carbon-coating
SiC fibers.
Embodiment 4
(1) fusion-free fibre prepared in reference example 1 is placed in graphite furnace, is passed through nitrogen, with 150 DEG C/h of liter
Warm speed rises to 1500 DEG C, keeps the temperature 1 hour, and inorganic SiC fibers are made.(2) inorganic SiC fibers are placed in pyrographite stove,
It vacuumizes, vacuum degree is made to reach 80Pa, rise to 1700 DEG C according to 200 DEG C/h of heating rate, keep the temperature 1 hour, surface is made
Continuous SiC fiber with carbon-coating.
Reference example 2
By the PCS polymer synthesized by Polycarbosilane and 2% aluminium acetylacetonate, (softening point is 217 DEG C, and number-average molecular weight is
4110g/mol, molecular weight distribution index 1.81) it is placed in the molten cylinder of melt spinning device, it is heated under inert atmosphere protection
362 DEG C are warming up to, after it is melted into improving uniformity of melt completely, under 287 DEG C, the pressure of 0.5MPa, with 420m/ minutes speed
Degree carries out drawing-off spinning, obtains the PCS fibrinogens that average diameter is 13um.PCS fibrinogens are placed in air curing processing dress
Middle carry out cure treatment is set, rise within 1 hour 100 DEG C and keeps the temperature 2 hours, then rises to 210 with 12 DEG C/h of heating rate
DEG C, it is down to room temperature after keeping the temperature 1 hour at 210 DEG C, fusion-free fibre is made.
Reference example 1 is the PCS polymer that the cracking polymerization of usual polydimethylsiloxane is formed.It is poly- carbon silicon referring to example 2
The PCS polymer formed after alkane and acetylacetone,2,4-pentanedione reactive aluminum.
Embodiment 5
(1) fusion-free fibre prepared in reference example 2 is placed in graphite furnace, is passed through nitrogen, with 120 DEG C/h of liter
Warm speed rises to 1300 DEG C, keeps the temperature 1 hour, and inorganic SiC fibers are made.(2) inorganic SiC fibers are placed in pyrographite stove,
It vacuumizes, vacuum degree is made to reach 5000Pa, rise to 1900 DEG C according to 200 DEG C/h of heating rate, keep the temperature 1 hour, table is made
Face has the continuous SiC fiber of carbon-coating.
Embodiment 6
(1) fusion-free fibre prepared in reference example 2 is placed in graphite furnace, is passed through nitrogen, with 110 DEG C/h of liter
Warm speed rises to 1300 DEG C, keeps the temperature 1 hour, and inorganic SiC fibers are made.(2) inorganic SiC fibers are placed in pyrographite stove,
It vacuumizes, vacuum degree is made to reach 800Pa, rise to 1600 DEG C according to 200 DEG C/h of heating rate, keep the temperature 0.5 hour, be made
Surface has the continuous SiC fiber of carbon-coating.
Embodiment 7
(1) fusion-free fibre prepared in reference example 2 is placed in graphite furnace, being passed through nitrogen and hydrogen, (hydrogen accounts for mixing
The volume ratio of gas is 25%), to rise to 1500 DEG C with 200 DEG C/h of heating rate, keep the temperature 0.5 hour, it is fine that inorganic SiC is made
Dimension.(2) inorganic SiC fibers are placed in pyrographite stove, vacuumize, vacuum degree is made to reach 0.002Pa, according to 600 DEG C/h
Heating rate rise to 1900 DEG C, keep the temperature 10 hours, surface, which is made, has the continuous SiC fiber of carbon-coating.
Embodiment 8
(1) fusion-free fibre prepared in reference example 2 is placed in graphite furnace, being passed through argon gas and ammonia, (ammonia accounts for mixing
The volume ratio of gas is 10%), to rise to 1000 DEG C with 50 DEG C/h of heating rate, keep the temperature 2 hours, inorganic SiC fibers are made.
(2) inorganic SiC fibers are placed in pyrographite stove, vacuumize, vacuum degree is made to reach 5Pa, according to 150 DEG C/h of heating
Speed rises to 1300 DEG C, keeps the temperature 1 hour, and surface, which is made, has the continuous SiC fiber of carbon-coating.
Embodiment 9
With embodiment 4 difference lies in：Vacuum degree is 5.0 × 104Pa。
Comparative example 1
The difference from example 2 is that：Inorganic SiC fibers are in vacuum environment according to 100 DEG C/h of heating rate liter
Temperature is to keeping the temperature after 1000 DEG C.
Comparative example 2
The difference from example 2 is that：Inorganic SiC fibers are in vacuum environment according to 350 DEG C/h of heating rate liter
Temperature is to keeping the temperature after 2000 DEG C.
The mechanics of gained continuous SiC fiber and heat resistance are listed in Table 1 below in Examples 1 to 8 and comparative example 1~2.Fiber
Diameter measured by micrometer caliper, and the mechanical property of fiber is measured by single fiber electronics strength tester.It melts highly basic and dissolves sample
Product analyze the silicone content in fiber with colorimetric determination, and carbon and oxygen content are then surveyed by C/S analyzers and N/O analyzers respectively
.
The surface being prepared in embodiment 2 has the continuous SiC fiber of carbon-coating, is kept the temperature at 1800 DEG C in argon gas atmosphere
It is down to room temperature after 1 hour, it is 82% to measure its strength retention ratio, which has excellent high temperature resistance.
Although fiber intensity obtained by comparative example 1 is higher, because its preparation temperature is too low, carbon-coating is not present in surface.In argon
It is down to room temperature after keeping the temperature 1 hour at 1800 DEG C in gas atmosphere, the fiber greening dusting, as shown in Figure 5,1 gained is fine in comparative example
Structure is tieed up at such a temperature by high temperature, no longer densification, loses intensity completely.
The fiber obtained in comparative example 2, although surface has carbon-coating, since preparation temperature is too high, fibre strength is substantially
Decline (referring to table 1), has seriously affected the application of fiber.
The mechanics and heat resistance table of gained continuous SiC fiber in 1 Examples 1 to 8 of table and comparative example 1~2
As shown in Table 1, surface, which can be made, in method provided by the invention has the carbon-coating of uniform thickness, while oxygen content also can
It is preferably controlled, so that the comprehensive performances such as mechanical property and high temperature resistance of gained fiber are superior to comparative example 1
Gained fiber in~2.Carbon layers having thicknesses can carry out artificial adjustment, make it have controllability under different sintering conditions.
Those skilled in the art will be clear that the scope of the present invention is not limited to example discussed above, it is possible to be carried out to it
Several changes and modification, the scope of the present invention limited without departing from the appended claims.Although in attached drawing and explanation
The present invention is illustrated and described in book in detail, but such illustrate and describe only is explanation or schematical, and not restrictive.
The present invention is not limited to the disclosed embodiments.
By to attached drawing, the research of specification and claims, those skilled in the art can be in carrying out the present invention
Understand and realize the deformation of the disclosed embodiments.In detail in the claims, term " comprising " is not excluded for other steps or element,
And indefinite article "one" or "an" be not excluded for it is multiple.The certain measures quoted in mutually different dependent claims
The fact does not mean that the combination of these measures cannot be advantageously used.Any reference marker in claims is not constituted pair
The limitation of the scope of the present invention.
Claims (4)
1. a kind of surface has the preparation method of the continuous SiC fiber of carbon-coating, which is characterized in that include the following steps：It will be inorganic
SiC fibers keep the temperature 0.5 after being warming up to 1300 DEG C~1900 DEG C according to 150~600 DEG C/h of heating rate in vacuum environment
~10 hours, the surface, which is made, had the SiC fibers of carbon-coating；
The preparation of the inorganic SiC fibers includes the following steps：By the fusion-free fibre prepared by PCS polymer in gaseous environment
Under, 1000~1500 DEG C are risen to according to 50~200 DEG C/h of heating rate, keeps the temperature 0.5~2 hour, is made；
The gas is the group of one or any kind of composition in nitrogen, argon gas, helium, hydrogen or ammonia；
The vacuum degree of the vacuum environment is less than 1.01 × 105Pa。
2. surface according to claim 1 has the preparation method of the continuous SiC fiber of carbon-coating, which is characterized in that heating
The heating rate is 200~500 DEG C/h when to 1300 DEG C~1900 DEG C.
3. there is the continuous SiC fiber of carbon-coating, feature to exist on a kind of surface being prepared by claims 1 or 2 the method
In there are carbon-coatings on the continuous SiC fiber surface.
4. surface according to claim 3 has the continuous SiC fiber of carbon-coating, which is characterized in that the thickness of the carbon-coating
For 1nm~4.5 μm.
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