摘要
采用低浓度先驱体溶液利用先驱体浸渍裂解(PIP)工艺在SiC纤维表面制备了SiC涂层,研究了浸渍裂解次数对纤维涂层形貌的影响。研究表明,采用10%的PCS先驱体溶液经3次浸渍裂解后可在纤维表面制得连续致密的SiC涂层。采用经涂层处理的SiC纤维布经热模压成型—先驱体浸渍裂解工艺制备了2D-SiCf/SiC复合材料,其弯曲强度随制备涂层浸渍裂解次数的增加先增后降,经3次浸渍裂解制备涂层的复合材料强度最高,由未经涂层处理的163.5MPa增大到245.9MPa,强度提高近50%。研究证明,SiC纤维表面SiC涂层使纤维在材料致密化过程所受的损伤减小,同时改善了界面,使复合材料强度明显提高。
SiC coating of SiC fiber was prepared by Precursor Infiltration Pyrolysis （PIP） process using low concentration precursor solution, and effects of infiltration pyrolysis times on coating morphology were studied. The results show that the continuous and compact coating can be gained by three times of infiltration pyrolysis process using 10t% （mass fraction）PCS solution. The 2D-SiCf/SiC composites were fabricated by Hot Pressing-Precursor Infiltration Pyrolysis process using SiC fiber cloth containing SiC coating. It is found that the flexural strength of composites reached the maximal value by three times of infiltration pyrolysis process, and the flexural strength increased about 50% , from 163.5MPa without coating treatment to 245.9MPa. The research indicates that the SiC coating can decrease the damage of SiC fiber, and the interface also can be improved, which makes the mechanical properties enhance obviously.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2009年第3期78-82,共5页
Journal of Aeronautical Materials
基金
总装预研项目(51310060204)
海军预研项目(40108010103)
