摘要
碳纤维增强的纳米碳化硅陶瓷基复合材料力学性能优良,且具有一定的生物相容性,因此可作为一种新型的可取代钛合金的全尺寸整体人工骨骼。研究了具有三向正交结构的T300和M30碳纤维预制体对C/SiC复合材料制备过程和抗弯强度的影响规律。以聚碳硅烷为先驱体,以二乙烯基苯为溶剂和交连剂,采用聚合物浸渍热解法制备了C/SiC复合材料,采用阿基米德排水法测量其密度和气孔率,采用三点抗弯法测量其抗弯强度。M30 C/SiC抗弯强度比T300 C/SiC高6.7%,表明碳纤维弹性模量对复合材料基体开裂强度有显著影响,并通过增加纤维径向强度以及承担载荷的比例提高了复合材料的断裂强度。
Nano silicon carbide composites reinforced by carbon fibers have excellent mechanical property and biocompatibility, and can be used as a full scale human skeleton to take the place of titanium alloy. The purpose of this paper is to investigate the effects of 3D orthogonal plaiting textures of T300 and M30 carbon fibers on the preparation process and flexural strength. C/SiC composites were prepared by polymer infiltration pyrolysis using polycarbosilane as preceramic and divinylbenzene as solvent. The density and porosity of C/SiC composites were measured by the Archimedes method. The flexural strength was tested by the method of three points bending. The flexural strength of M30 C/SiC composites is about 6.7% greater than that of T300 C/SiC composites. The results indicate that the cracking strength of C/SiC composites is dramatically affected by the elastic modulus of carbon fibers. High flexural strength of M30 C/SiC composites resulted from the high radial strength and high load-bearing ratio of fiber to matrix, which all resulted from the higher elastic modulus of M30 than that of T300 carbon fibers.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2008年第6期97-101,共5页
Acta Materiae Compositae Sinica
基金
十五国防先进材料重点支助项目(MKPT-01-067ZD)
