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C/SiC復(fù)合材料用莫來(lái)石/硅酸釔雙層涂層的抗氧化性能研究
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作者單位:

海軍工程大學(xué) 動(dòng)力工程學(xué)院

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通訊作者:

中圖分類號(hào):

TB232

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(51802347),湖北省自然科學(xué)基金(2018CFB183),軍內(nèi)科研項(xiàng)目(HJ20172A02148)


Anti-oxidation properties of the mullite/yttrium silicate bilayer coating for C/SiC composites
Author:
Affiliation:

1.College of Power Engineering, Naval University of Engineering;2.College of Power Engineering,Naval University of Engineering

Fund Project:

National Natural Science Foundation of China(51802347),Natural Science Foundation of Hubei Province(2018CFB183),Military Research Project(HJ20172A02148)

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    摘要:

    C/SiC復(fù)合材料具有高強(qiáng)度、低密度、耐高溫等優(yōu)良性能,然而碳纖維及基體碳化硅的高溫氧化限制了其進(jìn)一步的廣泛應(yīng)用。本文針對(duì)C/SiC復(fù)合材料的防氧化要求,在材料表面通過(guò)等離子噴涂法制備了莫來(lái)石/硅酸釔的雙層涂層,對(duì)涂層的形貌、組成和結(jié)構(gòu)及其與基底的結(jié)合強(qiáng)度進(jìn)行了表征,開(kāi)展了1500℃、1h靜態(tài)空氣氧化實(shí)驗(yàn),對(duì)抗氧化涂層的結(jié)構(gòu)演變進(jìn)行了分析,并對(duì)C/SiC復(fù)合材料氧化實(shí)驗(yàn)前后的質(zhì)量和力學(xué)性能變化進(jìn)行了研究。結(jié)果表明,莫來(lái)石/硅酸釔雙層涂層抗氧化作用較好,涂層C/SiC復(fù)合材料的強(qiáng)度保留率達(dá)95.3%。

    Abstract:

    Continuous carbon fibre reinforced silicon carbide (C/SiC) composites exhibit superior properties such as high strength, low density and high temperature tolerance, however, their applications are limited because of the rapid oxidation of carbon fibre and SiC matrix at elevated temperature. In this work, a mullite/yttrium silicate bilayer coating was prepared by plasma spray method as the oxidation protective coating. The morphology, composition, microstructure and adherence strength of the coating were analyzed. The efficiency of the coating against oxidation was characterized by means of heat treatment of the C/SiC composites at 1500 °C in static air for 1 hour. The structural change of the coating was studied, the weight and flexural strength of the C/SiC composites before and after the heat treatment were investigated. The results indicated that the mullite/yttrium silicate bilayer coating exhibited excellent oxidation resistance as the flexural strength of the composites retained 95.3 % of the original strength.

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趙爽,楊飛躍,陳國(guó)兵,陳俊,楊自春. C/SiC復(fù)合材料用莫來(lái)石/硅酸釔雙層涂層的抗氧化性能研究[J].稀有金屬材料與工程,2020,49(4):1256~1260.[Shuang Zhao, Feiyue Yang, Guobing Chen, Jun Chen, Zichun Yang. Anti-oxidation properties of the mullite/yttrium silicate bilayer coating for C/SiC composites[J]. Rare Metal Materials and Engineering,2020,49(4):1256~1260.]
DOI：10.12442/j. issn.1002-185X. SG20190061

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  • 收稿日期:2019-04-26
  • 最后修改日期:2019-07-20
  • 錄用日期:2019-10-14
  • 在線發(fā)布日期: 2020-05-07
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