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江河,王法,李昕,董建新.SiC纤维增强高温合金复合材料可行性分析[J].稀有金属材料与工程(英文),2021,50(1):349~360.[JIANG He,WANG Fa,LI Xin and DONG Jianxin.THE FEASIBILITY ANALYSIS OF SIC FIBER REINFORCED SUPERALLOY-BASED COMPOSITE[J].Rare Metal Materials and Engineering,2021,50(1):349~360.]
THE FEASIBILITY ANALYSIS OF SIC FIBER REINFORCED SUPERALLOY-BASED COMPOSITE
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Received:December 28, 2019  
DOI:
Key words: SiC fiber  superalloy  composite material  feasibility analysis
Foundation item:高温结构材料重点实验室开放基金
Author NameAffiliation
JIANG He,WANG Fa,LI Xin and DONG Jianxin  
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Abstract:
      SiC fiber reinforced metal-base composite is more and more widely used in aerospace field for the higher temperature capability, lower density. SiC fiber reinforced Ti, Al, Mg based composites have proved to be great success. But the usage temperature of these composites has been limited by the usage temperature of base metal. In order to further increase the temperature capability of SiC fiber reinforced metal-base composite and obtain high-temperature structural material with better properties, there are some attempts of SiC fiber reinforced superalloy-base composite at home and aboard. However, the development of SiC fiber reinforced superalloy-base composite is in slow development and there has not been breakthrough success. The bottleneck for the development of SiC fiber reinforced superalloy-base composite is the interface reaction between SiC fiber and superalloy base. Many attempts (such as a variety of interface coatings) have been made to conquer this challenge, however, no mature solution has been found. Hence, it is necessary to systematically analyze the feasibility of SiC fiber reinforced superalloy-based composite. In this paper, the origin and development of SiC fiber reinforced superalloy-based composites in past decades were narrated. The failure cases and reasons were summarized. Moreover, the attempts of interface coating and disadvantages of this method were analyzed. Experiments and simulations were carried out to investigate the interface reaction between SiC fiber and major superalloy elements. The results show that the reaction between SiC fiber and major superalloy elements is severe and cannot be avoided. Further analysis on the essence of severe reaction between SiC fiber and superalloy was made. The experiment and analysis show that SiC fiber and superalloy are intrinsically incompatible, and the interface reaction trend is severe. Interface coating can hinder the reaction in some extent. But the reaction trend is so severe that any minor failure of coating will result in catastrophic result. The above reasons indicate that it is difficult for SiC fiber reinforced superalloy-base composite to be used commercially in the near future.