摘要
选用三维五向编织结构的SiC纤维为增强体,采用真空辅助压力浸渗法制备纤维体积分数为48%的3D-SiC_f/ZL301复合材料,研究了浸渗保压时间对3D-SiC_f/Al复合材料微观组织及力学性能的影响。结果表明,复合材料的致密度随着保压时间的延长而增大,达到99.0%,延长保压时间可以减少复合材料纤维束内空隙和团聚现象;而复合材料的抗拉强度则随着保压时间的增加呈先上升后下降的趋势,这是由于过强的界面反应导致复合材料的力学性能恶化。
The vacuum gas pressure infiltration was used to prepare the 3D-SiCf/Al composites with the volume fraction of 48%,of which the reinforced material adopted 3D five-directional braided performs woven by KD-Ⅱ SiC fiber with the holding pressure for 10 min,20 min,30 min,respectively.The effects of holding pressure time on microstructure and mechanical properties of 3D-SiC_f/Al composites were analyzed.The results show that the average relative density of 3D-SiC_f/Al composites is increased to 99.0% with the increase of holding pressure time,which is attributed to the holding pressure time effectively reducing the voids in the fiber bundle and fiber reunion.The tensile strength of 3D-SiC_f/Al composites is increased firstly and then decreased with the increase of holding pressure time,which is attributed to the strong interfacial reaction deteriorating the mechanical properties of the composites.
作者
胡银生
尹家新
余欢
徐志锋
谢葵
Hu Yinsheng1 Yi Jiaxin2, Yu Huan1 Xu Zhifeng1 Xie Ku(1.National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University;2. Hubei Wanfeng Sanjiang Aerospace Science and Technology Development Co., Ltd)
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2018年第10期1100-1104,共5页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(AA201301219)
江西省自然科学基金资助项目(20151BAB206004)
