C/C坯体对C/SiC复合材料组织结构和导热性能的影响
|
摘要
以无涂层、C+SiC复合涂层处理的炭布/网胎预制体,分别经过化学气相渗透、树脂浸渍/炭化制备了3种C/C坯体,熔融渗硅后获得不同的C/SiC复合材料,对其组织结构和导热性能进行了研究。结果表明:热解炭坯体的C/SiC复合材料存在集中分布的Si,混合基体炭的C/SiC中可见较多微裂纹,C+SiC涂层的材料中残留Si含量少,基体组织均匀;热解炭坯体的C/SiC复合材料热扩散率和导热系数最大;混合基体炭的坯体,纤维经过C+SiC涂层,可明显提高材料的热扩散率和导热系数,且随温度的升高,导热系数的下降速率增大。
The C/SiC composites were fabricated by reactive silicon infiltration process,using three kinds of porous C/C preforms prepared by chemical vapor infiltration,resin impregnation carbonization,C + SiC coatings with the carbon cloth/felt as preforms. Microstructure and thermal conductivity of C/SiC composites were studied.The results show that there are concentrated Si in C/SiC composites prepared from pyro-carbon matrix and more microcracks in C/SiC composites with mixed carbon matrix. C/SiC composites with C + SiC coatings have the least residual Si and the matrix structure is uniform. The thermal diffusivity and thermal conductivity of C/SiC composites with pyro-carbon matrix is highest. C + SiC coatings on carbon fiber are conducive to significantly improve the thermal diffusivity and thermal conductivity of C/SiC composites with mixed carbon matrix. And with the increase of temperature,the decrease rate of thermal conductivity increases.
The C/SiC composites were fabricated by reactive silicon infiltration process,using three kinds of porous C/C preforms prepared by chemical vapor infiltration,resin impregnation carbonization,C + SiC coatings with the carbon cloth/felt as preforms. Microstructure and thermal conductivity of C/SiC composites were studied.The results show that there are concentrated Si in C/SiC composites prepared from pyro-carbon matrix and more microcracks in C/SiC composites with mixed carbon matrix. C/SiC composites with C + SiC coatings have the least residual Si and the matrix structure is uniform. The thermal diffusivity and thermal conductivity of C/SiC composites with pyro-carbon matrix is highest. C + SiC coatings on carbon fiber are conducive to significantly improve the thermal diffusivity and thermal conductivity of C/SiC composites with mixed carbon matrix. And with the increase of temperature,the decrease rate of thermal conductivity increases.
引文
[1]张智,郝志彪,闫联生.C/C-Si C复合材料制备方法及应用现状[J].炭素,2008(2):29-35.
[2]KRENKEL WALTER.Cost effective processing of CMC composites by melt infiltration(LSI-process)[J].Ceramic Engineering and Science Proceedings,2001,22(3):443-454.
[3]陆有军,王燕民,吴澜尔.碳/碳化硅陶瓷基复合材料的研究及应用进展[J].材料导报,2010,24(11):14-19.
[4]崔园园,白瑞成,孙晋良,等.熔融渗硅法制备C/CSi C复合材料的研究进展[J].材料导报,2011,25(1):31-35.
[5]秦明升,肖鹏,熊翔.C/C-Si C制动材料的研究进展[J].材料导报,2008,22(8):36-38.
[6]张德坷,曹英斌,刘荣军,等.C/Si C复合材料空间光机结构的研究进展与展望[J].材料导报,2012,26(7):7-11.
[7]王林山,熊翔,肖鹏,等.反应熔渗法制备C/C-Si C复合材料及其影响因素的研究进展[J].粉末冶金技术,2003,21(1):37-41.
[8]冉丽萍,易茂中,陈斌.C/C坯体对RMI C/C-Si C复合材料组织的影响[J].中国有色金属学报,2005,15(8):1208-1213.
[9]冉丽萍,刘亦奇,杨琳,等.基体炭对反应熔渗法制备的C/C-Si C复合材料性能的影响[J].粉末冶金材料科学与工程,2011,16(3):374-378.
[10]PATEL Manish,SAURABH Kumar,PRASAD B V V,et al.High temperature C/C-Si C composite by liquid silicon infiltration:a literature review[J].Bulletin of Materials Science,2012,35(1):63-73.
[11]肖鹏,谢建伟,熊翔,等.CVI-RMI法制备C/Si C复合材料的微观结构与弯曲性能[J].中南大学学报,2007,38(3):381-385.
[12]王继平,金志浩,钱军民,等.反应熔渗法制备C/CSi C复合材料及其反应机理和动力学的研究进展[J].硅酸盐学报,2005,33(9):1120-1126.
[13]唐睿,王继平,龙冲生,等.反应熔渗法制备C/CSi C材料的组织结构及性能[J].核动力工程,2009,30(1):68-72.
[14]虎琳,肖志超,张永辉.Si C含量对C/C-Si C炭陶复合材料力学和热学性能的影响[J].航天制造技术,2017,(4):1-5.
[15]李专,肖鹏,熊翔,等.C/C-Si C复合材料的导热性能及其影响因素[J].中南大学学报(自然科学版),2013,44(1):40-45.
[16]白龙腾,杨晓辉,王毅,等.低成本制造C/Si C复合材料的热物理性能研究[J].火箭推进,2016,42(1):58-65.
[17]刘涛,罗瑞盈,李进松,等.炭/炭复合材料的热物理性能[J].炭素技术,2005,24(5):28-33.
[18]李宏,徐永东,张立同,等.2.5D C/Si C复合材料的热物理性能[J].航空材料学报,2007,27(4):60-64.
[2]KRENKEL WALTER.Cost effective processing of CMC composites by melt infiltration(LSI-process)[J].Ceramic Engineering and Science Proceedings,2001,22(3):443-454.
[3]陆有军,王燕民,吴澜尔.碳/碳化硅陶瓷基复合材料的研究及应用进展[J].材料导报,2010,24(11):14-19.
[4]崔园园,白瑞成,孙晋良,等.熔融渗硅法制备C/CSi C复合材料的研究进展[J].材料导报,2011,25(1):31-35.
[5]秦明升,肖鹏,熊翔.C/C-Si C制动材料的研究进展[J].材料导报,2008,22(8):36-38.
[6]张德坷,曹英斌,刘荣军,等.C/Si C复合材料空间光机结构的研究进展与展望[J].材料导报,2012,26(7):7-11.
[7]王林山,熊翔,肖鹏,等.反应熔渗法制备C/C-Si C复合材料及其影响因素的研究进展[J].粉末冶金技术,2003,21(1):37-41.
[8]冉丽萍,易茂中,陈斌.C/C坯体对RMI C/C-Si C复合材料组织的影响[J].中国有色金属学报,2005,15(8):1208-1213.
[9]冉丽萍,刘亦奇,杨琳,等.基体炭对反应熔渗法制备的C/C-Si C复合材料性能的影响[J].粉末冶金材料科学与工程,2011,16(3):374-378.
[10]PATEL Manish,SAURABH Kumar,PRASAD B V V,et al.High temperature C/C-Si C composite by liquid silicon infiltration:a literature review[J].Bulletin of Materials Science,2012,35(1):63-73.
[11]肖鹏,谢建伟,熊翔,等.CVI-RMI法制备C/Si C复合材料的微观结构与弯曲性能[J].中南大学学报,2007,38(3):381-385.
[12]王继平,金志浩,钱军民,等.反应熔渗法制备C/CSi C复合材料及其反应机理和动力学的研究进展[J].硅酸盐学报,2005,33(9):1120-1126.
[13]唐睿,王继平,龙冲生,等.反应熔渗法制备C/CSi C材料的组织结构及性能[J].核动力工程,2009,30(1):68-72.
[14]虎琳,肖志超,张永辉.Si C含量对C/C-Si C炭陶复合材料力学和热学性能的影响[J].航天制造技术,2017,(4):1-5.
[15]李专,肖鹏,熊翔,等.C/C-Si C复合材料的导热性能及其影响因素[J].中南大学学报(自然科学版),2013,44(1):40-45.
[16]白龙腾,杨晓辉,王毅,等.低成本制造C/Si C复合材料的热物理性能研究[J].火箭推进,2016,42(1):58-65.
[17]刘涛,罗瑞盈,李进松,等.炭/炭复合材料的热物理性能[J].炭素技术,2005,24(5):28-33.
[18]李宏,徐永东,张立同,等.2.5D C/Si C复合材料的热物理性能[J].航空材料学报,2007,27(4):60-64.