CN102295465A - Hot-press preparation method of short carbon fiber/silicon carbide composite material - Google Patents
Hot-press preparation method of short carbon fiber/silicon carbide composite material Download PDFInfo
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Abstract
The invention discloses a hot-press preparation method of a short carbon fiber/silicon carbide composite material, comprising the following steps: putting a preoxidized fiber in heated alkali liquor, carrying out splitting processing, then washing with distilled water; mixing the preoxidized fiber processed by splitting with silicon carbide powder, sintering aid, binder, interfacial wetting agent, antifoaming agent and water, and uniformly pounding to obtain a slurry; putting the slurry in a graphite die, compacting and drying, finally putting the graphite die with the body in a hotpressing furnace, and sintering at high temperature to obtain the short carbon fiber/silicon carbide composite material. The method adopts the preoxidized fiber with good toughness as the raw material instead of the short carbon fiber with brittleness, so that the problem that the preoxidized fiber is easy to break in the splitting process is avoided; and the preoxidized fiber can in situ conversed into a carbon fiber in the sintering process, so that the resource of the carbon fiber is widened, and the cost is reduced; and simultaneously, Al-Si eutectic powder and B-Al alloy powder are used in the sintering aid instead of a mixture of aluminium powder and boron powder, so that the problem that aluminium reacts with carbon to generate easy hydrolytic compound A14C3 can be avoided.
Description
Technical field
The present invention relates to a kind of preparation method of chopped carbon fiber/composite material of silicon carbide, be specifically related to the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide.
Background technology
Chopped carbon fiber/silicon carbide (C
Sf/ SiC) having the 26S Proteasome Structure and Function characteristic concurrently, over-all properties is superior, has application prospect in fields such as braking, sliding friction, bone implantation, elevated-temperature seal, speculums.Tang Hanling etc. has proposed a kind of employing chopped carbon fiber as strengthening toughened fiber, with silicon, aluminium, boron is done sintering aid, hot pressing prepares method (the Hanling Tang of chopped carbon fiber/silicon carbide, XierongZeng, XinboXiong, LongLi, JizhaoZou.Mechanical and tribological properties of short-fiber-reinforced SiC composites, Tribology International, 2009,42:823-827), this method can obtain the material density height, reach more than 99%, and the carbon fiber large volume fraction is big, and homodisperse.But the carbon fiber that this method adopts costs an arm and a leg, and owing in the sintering aid pure aluminum is arranged, if therefore directly take out immediately behind the ball milling, vigorous reaction can take place in ball milling hybrid technique step from ball grinder, causes mixture to burn even explodes; If take out, because the easy and carbon reaction of aluminium in the mechanical milling process generates Al Deng ball grinder cooling back
4C
3Phase, this water generation vigorous reaction that meets can destroy carbon fiber, therefore when ball milling hybrid technique step, must add the gas protection and want careful operation.
Summary of the invention
The object of the present invention is to provide the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide that a kind of cost is low, the fiber protectiveness is good, technological process is easy to control, safe.
For achieving the above object, the technical solution used in the present invention is:
1) at first the pre-oxygen silk of 2～20mm or pre-oxygen silk and 2～20mm carbon fiber are placed NaOH, KOH or the Ca (OH) of 1～10mol/L with the mixture of any ratio
2The aqueous solution in, temperature be 40 ℃～100 ℃ down heating 1～24h open fine the processing, the clean and oven dry, standby with the distilled water ultrasonic cleaning then;
2) silicon carbide powder, sintering aid, binding agent, interface wetting agent, defoamer and water are mixed, and stir into uniform slip;
The silk union adding step 2 of pre-oxygen silk that 3) step 1) is obtained or pre-oxygen silk and carbon fiber) in the slip that obtains, smashes evenly, obtain containing the slip of pre-oxygen silk or silk union;
4) the more resulting slip that contains pre-oxygen silk or silk union being placed graphite jig, is to make base substrate under 5～10MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 100～120 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, be warming up to 900 ℃～1200 ℃ from room temperature with stove, at pressure is to handle 2～4h under the 20MPa, and then rise to 1800 ℃～2400 ℃, be 20MPa～40MPa at pressure, insulation 30min～60min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Described carbon fiber is the mixture of one or more arbitrary proportions in PAN-based carbon fiber, viscose-based carbon fiber, asphalt base carbon fiber or the graphite fibre.
The granularity of described silicon carbide powder is less than 2 μ m.
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 55%～70%, and the al-si eutectic powder is 20～30%, and the boron Al alloy powder is 10～25%.
Described binding agent is one or more of commercial phenolic resin or modified phenolic resins, Resins, epoxy and versamid 900.
Described interface wetting agent is one or more in ethanol, acetone and the glycerol.
Described defoamer is one or more in commercially available basic phenol polyethenoxy ether 9 in the ninth of the ten Heavenly Stems (suffering), the ninth of the ten Heavenly Stems (suffering) basic phenol polyethenoxy ether 15, op-10, tween 20, tween-80, this dish-60, the Span-80.
Described silicon carbide powder, sintering aid, binding agent, interface wetting agent, defoamer and water finish mix slurry, by 100 parts of mass fractions, wherein silicon carbide powder 27-37 part, 3～12 parts of sintering aids, 5～10 parts of binding agents, 5～10 parts of interface wetting agents, 1～5 part of defoamer, surplus is a water.
The volume fraction that described step 3) contains the silk union of pre-oxygen silk in the slip of pre-oxygen silk or silk union or pre-oxygen silk and carbon fiber is 15%～50%.
The present invention adopts pre-oxygen silk to substitute carbon fiber, with the mixture replacing boron powder of commercially available silica flour, al-si eutectic powder and boron Al alloy powder and the mixture of aluminium powder, and adopts aqueous slurries/hot pressing to prepare the method for chopped carbon fiber/silicon carbide.The present invention has the advantages that cost is low, the fiber protectiveness is good, technological process is more easy to control and safe.
Description of drawings
Fig. 1 is at the flying-spot microscope picture that is incubated sintering 60min gained chopped carbon fiber/silicon carbide under 130min, the 1800 ℃ of 30MPa pressure under 1000 ℃ of following 20MPa pressure.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Embodiment 1:
1) at first the pre-oxygen silk of 2～20mm is placed the aqueous solution of the NaOH of 5mol/L, temperature be 40 ℃ down heating 24h open fine the processing, the clean and oven dry, standby with the distilled water ultrasonic cleaning then;
2) by 100 parts of mass fractions, 27 parts of granularities silicon carbide powder, 12 component sintering additives, 6 parts of binding agent commercial phenolic resin, 8 parts of interface wetting agent ethanol, 2 parts of commercially available polyoxyethylene octylphenol ether 9 and water of defoamer less than 2 μ m are mixed, and stir into uniform slip;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 55%, and the al-si eutectic powder is 20%, and the boron Al alloy powder is 25%;
3) the pre-oxygen silk that step 1) is obtained adds step 2) in the slip that obtains, smash evenly, obtain containing the slip of pre-oxygen silk;
Wherein the volume fraction of pre-oxygen silk is 50%;
4) the more resulting slip that contains pre-oxygen silk being placed graphite jig, is to make base substrate under the 6MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 100 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 1000 ℃ from room temperature with stove, is to handle 3h under the 20MPa at pressure, and then rise to 1800 ℃, be 30MPa at pressure, insulation 60min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.Referring to Fig. 1, as seen from Figure 1, silicon carbide substrate is very fine and close, and fiber is evenly distributed in silicon carbide substrate.
Embodiment 2:
1) at first the pre-oxygen silk of 2～20mm is placed the aqueous solution of the KOH of 8mol/L, temperature be 60 ℃ down heating 15h open fine the processing, the clean and oven dry, standby with the distilled water ultrasonic cleaning then;
2) by 100 parts of mass fractions, 37 parts of granularities are mixed less than the silicon carbide powder of 2 μ m, 3 component sintering additives, 10 parts of binder modification resol, 5 parts of interface wetting agent acetone, 5 parts of defoamer polyoxyethylene octylphenol ethers 15 and water, and stir into uniform slip;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 70%, and the al-si eutectic powder is 20%, and the boron Al alloy powder is 10%;
3) the pre-oxygen silk that step 1) is obtained adds step 2) in the slip that obtains, smash evenly, obtain containing the slip of pre-oxygen silk;
Wherein the volume fraction of pre-oxygen silk is 10%;
4) the more resulting slip that contains pre-oxygen silk being placed graphite jig, is to make base substrate under the 10MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 120 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 1200 ℃ from room temperature with stove, is to handle 2h under the 20MPa at pressure, and then rise to 2000 ℃, be 20MPa at pressure, insulation 30min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Embodiment 3:
1) at first the pre-oxygen silk of 2～20mm and the PAN-based carbon fiber of 2～20mm are placed the Ca (OH) of 1mol/L with the mixture of any ratio
2The aqueous solution in, temperature be 100 ℃ down heating 1h open fine the processing, the clean and oven dry, standby with the distilled water ultrasonic cleaning then;
2), 30 parts of granularities are mixed less than the silicon carbide powder of 2 μ m, 10 component sintering additives, 8 parts of epoxy resin of binder, 10 parts of interface wetting agent glycerol, 1 part of defoamer op-10 and water, and stir into uniform slip by 100 parts of mass fractions;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 60%, and the al-si eutectic powder is 30%, and the boron Al alloy powder is 10%;
3) the pre-oxygen silk that step 1) is obtained and the silk union of PAN-based carbon fiber add step 2) in the slip that obtains, smash evenly, obtain containing the slip of silk union;
The volume fraction of the silk union of wherein pre-oxygen silk and PAN-based carbon fiber is 40%;
4) the more resulting slip that contains silk union being placed graphite jig, is to make base substrate under the 8MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 110 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 900 ℃ from room temperature with stove, is to handle 4h under the 20MPa at pressure, and then rise to 2400 ℃, be 40MPa at pressure, insulation 50min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Embodiment 4:
1) at first the pre-oxygen silk of 2～20mm and the viscose-based carbon fiber of 2～20mm are placed the aqueous solution of the NaOH of 3mol/L with the mixture of any ratio, under temperature is 50 ℃, heat 20h and open fine the processing, then with totally also oven dry, standby of distilled water ultrasonic cleaning;
2) by 100 parts of mass fractions, 32 parts of granularities are mixed less than the mixture of the silicon carbide powder of 2 μ m, 8 component sintering additives, 5 parts of binding agent versamid 900s, 7 parts of interface wetting agent ethanol and acetone, 4 parts of defoamer tween 20s and water, and stir into uniform slip;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 65%, and the al-si eutectic powder is 25%, and the boron Al alloy powder is 10%;
3) the pre-oxygen silk that step 1) is obtained and the silk union of carbon fiber add step 2) in the slip that obtains, smash evenly, obtain containing the slip of silk union;
The volume fraction of the silk union of wherein pre-oxygen silk and carbon fiber is 15%;
4) the more resulting slip that contains silk union being placed graphite jig, is to make base substrate under the 5MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 103 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 1100 ℃ from room temperature with stove, is to handle 2.5h under the 20MPa at pressure, and then rise to 1900 ℃, be 25MPa at pressure, insulation 45min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Embodiment 5:
1) at first the pre-oxygen silk of 2～20mm and the asphalt base carbon fiber of 2～20mm are placed the aqueous solution of the KOH of 7mol/L with the mixture of any ratio, under temperature is 80 ℃, heat 10h and open fine the processing, then with totally also oven dry, standby of distilled water ultrasonic cleaning;
2) by 100 parts of mass fractions, 34 parts of granularities are mixed less than the mixture of the silicon carbide powder of 2 μ m, 6 component sintering additives, 9 parts of binding agent commercial phenolic resin and the mixture of Resins, epoxy, 6 parts of interface wetting agent ethanol, acetone and glycerol, 3 parts of defoamer these dishes-60 and water, and stir into uniform slip;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 57%, and the al-si eutectic powder is 23%, and the boron Al alloy powder is 20%;
3) the pre-oxygen silk that step 1) is obtained and the silk union of carbon fiber add step 2) in the slip that obtains, smash evenly, obtain containing the slip of silk union;
The volume fraction of the silk union of wherein pre-oxygen silk and carbon fiber is 30%;
4) the more resulting slip that contains silk union being placed graphite jig, is to make base substrate under the 9MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 108 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 950 ℃ from room temperature with stove, is to handle 3.5h under the 20MPa at pressure, and then rise to 2100 ℃, be 32MPa at pressure, insulation 35min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Embodiment 6:
1) at first the pre-oxygen silk of 2～20mm and the graphite fibre of 2～20mm are placed the Ca (OH) of 10mol/L with the mixture of any ratio
2The aqueous solution in, temperature be 70 ℃ down heating 18h open fine the processing, the clean and oven dry, standby with the distilled water ultrasonic cleaning then;
2) by 100 parts of mass fractions, 35 parts of granularities are mixed with the mixture and the water of tween-80, and stirred into uniform slip less than the silicon carbide powder of 2 μ m, 5 component sintering additives, the mixture of 7 parts of binder modification resol, Resins, epoxy and versamid 900s, 9 parts of interface wetting agent ethanol, 3 parts of commercially available polyoxyethylene octylphenol ethers 15 of defoamer;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 59%, and the al-si eutectic powder is 26%, and the boron Al alloy powder is 15%;
3) the pre-oxygen silk that step 1) is obtained and the silk union of carbon fiber add step 2) in the slip that obtains, smash evenly, obtain containing the slip of silk union;
The volume fraction of the silk union of wherein pre-oxygen silk and carbon fiber is 35%;
4) the more resulting slip that contains silk union being placed graphite jig, is to make base substrate under the 7MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 115 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 1050 ℃ from room temperature with stove, is to handle 3h under the 20MPa at pressure, and then rise to 2300 ℃, be 36MPa at pressure, insulation 55min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Embodiment 7:
1) at first the pre-oxygen silk of 2～20mm and PAN-based carbon fiber, viscose-based carbon fiber and the asphalt base carbon fiber of 2～20mm are placed the aqueous solution of the NaOH of 6mol/L with the mixture of any ratio, under temperature is 90 ℃, heat 10h and open fine the processing, then with totally also oven dry, standby of distilled water ultrasonic cleaning;
2), 29 parts of granularities are mixed less than the silicon carbide powder of 2 μ m, 11 component sintering additives, 8 parts of binding agent commercial phenolic resin, 7 parts of interface wetting agent glycerol, 2 parts of defoamer Span-80s and water, and stir into uniform slip by 100 parts of mass fractions;
Described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, and wherein the mass percent of silica flour is 59%, and the al-si eutectic powder is 26%, and the boron Al alloy powder is 15%;
3) the pre-oxygen silk that step 1) is obtained and the silk union of carbon fiber add step 2) in the slip that obtains, smash evenly, obtain containing the slip of silk union;
The volume fraction of the silk union of wherein pre-oxygen silk and carbon fiber is 25%;
4) the more resulting slip that contains silk union being placed graphite jig, is to make base substrate under the 8MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 118 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, being warming up to 1150 ℃ from room temperature with stove, is to handle 2h under the 20MPa at pressure, and then rise to 2200 ℃, be 28MPa at pressure, insulation 40min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
Claims (9)
1. the hot pressing method for preparing of a chopped carbon fiber/composite material of silicon carbide is characterized in that comprising the steps:
1) at first the pre-oxygen silk of 2～20mm or pre-oxygen silk and 2～20mm carbon fiber are placed NaOH, KOH or the Ca (OH) of 1～10mol/L with the mixture of any ratio
2The aqueous solution in, temperature be 40 ℃～100 ℃ down heating 1～24h open fine the processing, the clean and oven dry, standby with the distilled water ultrasonic cleaning then;
2) silicon carbide powder, sintering aid, binding agent, interface wetting agent, defoamer and water are mixed, and stir into uniform slip;
The silk union adding step 2 of pre-oxygen silk that 3) step 1) is obtained or pre-oxygen silk and carbon fiber) in the slip that obtains, smashes evenly, obtain containing the slip of pre-oxygen silk or silk union;
4) the more resulting slip that contains pre-oxygen silk or silk union being placed graphite jig, is to make base substrate under 5～10MPa at pressure, and the graphite jig that will contain base substrate then places the vacuum drying oven that vacuumizes, 100～120 ℃ of dryings;
5) dried base substrate is placed hot pressing furnace together with graphite jig, be warming up to 900 ℃～1200 ℃ from room temperature with stove, at pressure is to handle 2～4h under the 20MPa, and then rise to 1800 ℃～2400 ℃, be 20MPa～40MPa at pressure, insulation 30min～60min sintering cools to room temperature with the furnace and obtains chopped carbon fiber/composite material of silicon carbide.
2. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1, it is characterized in that: described carbon fiber is the mixture of one or more arbitrary proportions in PAN-based carbon fiber, viscose-based carbon fiber, asphalt base carbon fiber or the graphite fibre.
3. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1, it is characterized in that: the granularity of described silicon carbide powder is less than 2 μ m.
4. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1, it is characterized in that: described sintering aid is the mixture of silica flour, al-si eutectic powder and boron Al alloy powder, wherein the mass percent of silica flour is 55%～70%, the al-si eutectic powder is 20～30%, and the boron Al alloy powder is 10～25%.
5. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1, it is characterized in that: described binding agent is one or more of commercial phenolic resin or modified phenolic resins, Resins, epoxy and versamid 900.
6. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1, it is characterized in that: described interface wetting agent is one or more in ethanol, acetone and the glycerol.
7. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1 is characterized in that: described defoamer is one or more in commercially available basic phenol polyethenoxy ether 9 in the ninth of the ten Heavenly Stems (suffering), the ninth of the ten Heavenly Stems (suffering) basic phenol polyethenoxy ether 15, op-10, tween 20, tween-80, this dish-60, the Span-80.
8. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1, it is characterized in that: described silicon carbide powder, sintering aid, binding agent, interface wetting agent, defoamer and water finish mix slurry, by 100 parts of mass fractions, wherein silicon carbide powder 27-37 part, 3～12 parts of sintering aids, 5～10 parts of binding agents, 5～10 parts of interface wetting agents, 1～5 part of defoamer, surplus is a water.
9. the hot pressing method for preparing of chopped carbon fiber/composite material of silicon carbide according to claim 1 is characterized in that: the volume fraction that described step 3) contains the silk union of pre-oxygen silk in the slip of pre-oxygen silk or silk union or pre-oxygen silk and carbon fiber is 15%～50%.
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| CN104721884A (en) * | 2015-02-11 | 2015-06-24 | 深圳大学 | Biological active short carbon fiber/silicon carbide artificial bone material and preparation method thereof |
| CN104876621A (en) * | 2015-05-07 | 2015-09-02 | 陕西科技大学 | C/SiC porous composite ceramic with bionic structure and preparation method of C/SiC porous composite ceramic |
| CN106830963A (en) * | 2017-03-29 | 2017-06-13 | 西安天运新材料科技有限公司 | A kind of chopped carbon fiber/composite material of silicon carbide and preparation method thereof |
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| CN104721884A (en) * | 2015-02-11 | 2015-06-24 | 深圳大学 | Biological active short carbon fiber/silicon carbide artificial bone material and preparation method thereof |
| CN104876621A (en) * | 2015-05-07 | 2015-09-02 | 陕西科技大学 | C/SiC porous composite ceramic with bionic structure and preparation method of C/SiC porous composite ceramic |
| CN109133959A (en) * | 2016-12-02 | 2019-01-04 | 航天特种材料及工艺技术研究所 | A kind of Carbon Fiber Rigid thermal insulation tile and preparation method thereof |
| CN106830963A (en) * | 2017-03-29 | 2017-06-13 | 西安天运新材料科技有限公司 | A kind of chopped carbon fiber/composite material of silicon carbide and preparation method thereof |
| CN106830963B (en) * | 2017-03-29 | 2019-12-03 | 陕西天策新材料科技有限公司 | A kind of chopped carbon fiber/composite material of silicon carbide and preparation method thereof |
| CN108249945A (en) * | 2018-01-24 | 2018-07-06 | 北京航空航天大学 | The processing method of PAN-based stabilized fiber fibre reinforced composites bearing |
| CN108249945B (en) * | 2018-01-24 | 2018-12-11 | 北京航空航天大学 | The processing method of PAN-based stabilized fiber fibre reinforced composites bearing |
| CN109987955A (en) * | 2019-04-12 | 2019-07-09 | 王小玲 | A kind of C effectively improving interfacial combined functionf/ SiC ceramic matrix composite material and preparation method |
| CN114801353A (en) * | 2022-03-31 | 2022-07-29 | 西安航空制动科技有限公司 | Pre-oxidized fiber/carbon fiber structure preform and preparation method thereof |
| CN114801353B (en) * | 2022-03-31 | 2024-04-09 | 西安航空制动科技有限公司 | Pre-oxidized fiber/carbon fiber structure preform and preparation method thereof |
| CN116084160A (en) * | 2022-12-23 | 2023-05-09 | 航天特种材料及工艺技术研究所 | High-temperature-resistant antioxidant wave absorber and preparation method thereof |
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