不同炭基体C/C-SiC制动材料压缩性能研究  

Research of Compressive Performance of Different Carbon Matrix C/C-SiC Braking Composites

作　　者：秦明升[1] 肖鹏[1] 熊翔[1] 李专[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《矿冶工程》2009年第1期90-93,共4页Mining and Metallurgical Engineering

基　　金：国家高新技术研究发展计划资助项目(2006AA03Z560)

摘　　要：选用热固性酚醛树脂A和热塑性酚醛树脂B分别与短炭纤维、石墨粉、硅粉、碳化硅按一定的比例混合后,采用温压-原位反应法制备C/C-SiC试样1和试样2。研究了不同基体的C/C-SiC材料的压缩性能。试样1在垂直纤维层方向压缩载荷作用下,没有出现纤维的拔出、脱粘等现象,界面结合较强,材料呈现脆性断裂:σ⊥=60.7 MPa;而在平行纤维层的压缩载荷作用下,纤维与基体存在剪切作用,存在纤维的脱粘,试样呈现韧性断裂:σ∥=52.6 MPa。试样2由于纤维的分散性不好,大量聚集在一起,在压缩载荷的作用下,存在着纤维的拔出、脱粘现象,界面结合较差,材料呈现韧性断裂,强度较低:σ⊥=45.8 MPa,σ∥=19.4 MPa。After thermoset phenolic resin A and thermoplastic phenolic resin B were chosen to mixed with short carbon fibre, graphite, silicon and carborundum in a certain proportion respectively, sample 1 and 2 were prepared by warm moulding and in-situ reaction process. The compressive performance of the two different matrixes C/C-SiC was researched. Sample 1 had no phenomenon of pulling-out and debonding of fibres under vertical compression load and the interface bonding intensity is strong between the fibres and the matrix. The material shows brittle fracture ： σ⊥ = 60.7 MPa. However, sample 1 has the phenomenon of fibres debonding because of the shearing stress between the fibres and the matrix under parallel compression load. The material shows tough fracture ： σ∥ = 52.6 MPa. For sample 2, the fibres get together in mass because of the bad dispersion and present the phenomenon of pulling-out and debonding. The bonding is worse at the interface between the fibres and the matrix. The material shows tough fracture, with a low intensity：σ⊥ =45.8 MPa,σ∥ = 19.4 MPa.

关 键 词：C/C-SIC复合材料 炭基体 树脂炭 力学性能 界面强度 

分 类 号：TB331[一般工业技术—材料科学与工程] TH117.3[机械工程—机械设计及理论]