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炭/炭復(fù)合材料表面SiC/ZrSiO4-SiO2復(fù)合涂層的抗氧化性能與紅外發(fā)射特性研究
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湖南工業(yè)大學(xué) 冶金工程學(xué)院,中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室,中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室,中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室

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TB332

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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃（973計(jì)劃）


The anti-oxidation and infrared emissivity property of SiC/ZrSiO4-SiO2 composite coatings on carbon/carbon composites
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College of Metallurgical Engineering,Hunan University of Technology,State Key Laboratory of Powder Metallurgy,Central South University,State Key Laboratory of Powder Metallurgy,Central South University,State Key Laboratory of Powder Metallurgy,Central South University

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    摘要:

    為提高炭/炭(C/C)復(fù)合材料的高溫抗氧化性能并降低其紅外發(fā)射率,采用包埋–刷涂法在其表面制備了SiC/ZrSiO4-SiO2復(fù)合涂層。借助XRD、SEM和EDS等表征分析了涂層的成分與微觀結(jié)構(gòu),并研究了SiC/ZrSiO4-SiO2復(fù)合涂層包覆C/C復(fù)合材料在1400℃和1500℃動(dòng)態(tài)空氣條件下的抗氧化性能,以及在90℃和500℃下的紅外發(fā)射率。結(jié)果表明：由疏松結(jié)構(gòu)SiC內(nèi)涂層和鑲嵌結(jié)構(gòu)ZrSiO4-SiO2外涂層組成的SiC/ZrSiO4-SiO2復(fù)合涂層具有優(yōu)異的抗氧化性能,在1400℃和1500℃流動(dòng)空氣(0.6 L/min)等溫氧化條件下氧化50h后試樣的氧化失重率分別僅為0.124%和0.03%。在C/C復(fù)合材料表面制備SiC/ZrSiO4-SiO2復(fù)合涂層后其紅外發(fā)射率明顯降低,并隨溫度升高而越低。復(fù)合涂層包覆試樣在90℃時(shí)3~5μm和8~14μm波段的平均紅外發(fā)射率分別為0.55和0.66；在500℃時(shí)3~5μm和8~14μm波段的平均紅外發(fā)射率分別為0.48和0.62。SiC/ZrSiO4-SiO2復(fù)合涂層包覆C/C復(fù)合材料可作為優(yōu)良的低紅外發(fā)射率高溫?zé)峤Y(jié)構(gòu)材料應(yīng)用于航空航天領(lǐng)域。

    Abstract:

    The SiC/ZrSiO4-SiO2 composite coatings were prepared on carbon/carbon(C/C) composites by combining pack cementation and slurry painting method to improve the oxidation resistance and decrease the infrared emissivity. The phase compositions and microstructures of the as-prepared coatings were characterized by XRD, SEM and EDS. The oxidation resistance of the SiC/ZrSiO4-SiO2 coatings were evaluated in dynamic air (air flow rate: 0.6 L/min) at 1400℃ and 1500℃, respectively. The infrared emissivity of the SiC/ZrSiO4-SiO2 coatings coated C/C samples were also investigated at 90℃ and 500℃, respectively. The results show that the composite coatings which are composed of SiC inner coating with loose structure and ZrSiO4-SiO2 outer coating with mosaic structure exhibit excellent oxidation resistance and can protect C/C matrix from oxidation for long time. The mass loss rates of the SiC/ZrSiO4-SiO2 coatings coated samples are only 0.124% and 0.03% in dynamic air at 1400℃ and 1500℃ after 55h oxidation, respectively. The infrared emissivity of C/C composites can be decreased by coated SiC/ZrSiO4-SiO2 composite coatings, and the infrared emissivity descends with the temperature increasing. The average infrared emissivity of the coated C/C samples in 3~5μm and 8~14μm at 90℃ are 0.55 and 0.66, respectively. And the average infrared emissivity in 3~5μm and 8~14μm at 500℃ are 0.48 and 0.62, respectively. From the anti-oxidation and infrared emissivity property point of view, the C/C composites coated SiC/ZrSiO4-SiO2 coatings may be one of the most promising candidates as high-temperature structural materials applied in the field of aeronautics and astronautics.

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周 偉,肖 鵬,李 楊,羅 威.炭/炭復(fù)合材料表面SiC/ZrSiO4-SiO2復(fù)合涂層的抗氧化性能與紅外發(fā)射特性研究[J].稀有金屬材料與工程,2017,46(11):3479~3484.[ZHOU Wei, XIAO Peng, LI Yang, LUO Wei. The anti-oxidation and infrared emissivity property of SiC/ZrSiO4-SiO2 composite coatings on carbon/carbon composites[J]. Rare Metal Materials and Engineering,2017,46(11):3479~3484.]
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  • 收稿日期:2015-08-11
  • 最后修改日期:2015-12-17
  • 錄用日期:2016-01-14
  • 在線發(fā)布日期: 2017-12-13
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