叠层穿刺结构Cf/Al复合材料的弯曲性能及失效分析  

Bending properties and failure analysis of laminated puncture structural Cf/Al composites

作　　者：冯景鹏 余欢 徐志锋 蔡长春 王振军 帅亮 单嘉立 FENG Jing-peng;YU Huan;XU Zhi-feng;CAI Chang-chun;WANG Zhen-jun;SHUAI Liang;SHAN Jia-li(National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌330063

出　　处：《中国有色金属学报》2020年第11期2597-2604,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51765045,AA201301219);江西省自然科学基金资助项目(20151BAB206004)。

摘　　要：采用真空压力浸渗法制备纤维体积分数为47.5%的叠层穿刺结构Cf/Al复合材料,主要研究复合材料的显微组织以及弯曲性能,并进一步分析复合材料的弯曲失效机理。结果表明:复合材料的致密度为95.0%,经、纬向显微组织均存在少量微孔缺陷,且纬向显微组织的微孔缺陷较经向显微组织要多。叠层穿刺结构Cf/Al复合材料的弯曲强度和模量分别为327 MPa和114 GPa,内侧面受压处,基体出现团簇,经向纤维束由于屈曲变形程度大导致被压断,纬向纤维束发生相应地挤压变形,而在外侧面受拉处复合材料被拉伸破坏,造成基体开裂。Laminated puncture structural Cf/Al composites with 47.5%fiber volume fraction were fabricated by vacuum pressure infiltration.The microstructure and bending properties of the composites were studied,and the bending failure mechanism of the composites was further analyzed.The results indicate that the density of the composites is 95.0%,and there are a few micvoids defects in the warp and weft microstructure,and the micvoids defects in the weft microstructure are more than those in the warp microstructure.The bending strength and modulus of laminated puncture structural Cf/Al composites are 327 MPa and 114 GPa,respectively.In the compression area of the inner side,the matrix appears clusters,the warp fiber bundles are compressed fracture due to the large degree of buckling deformation,and the weft fiber bundles are corresponding extrusion deformation.While the composites of the outer side are damaged by tensile,which results in the matrix cracking.

关 键 词：叠层穿刺结构 CF/AL复合材料 显微组织 弯曲性能 失效机理 

分 类 号：TB331[一般工业技术—材料科学与工程]