硅树脂先驱体转化制备2DC_f/Si-O-C  

Fabrication of 2D C_f/Si-O-C via Silicone Resin Pyrolysis

作　　者：刘静宇[1] 陈朝辉[2] 简科[2] 马青松[2] 王松[2] 

机构地区：[1]长沙学院生物工程与环境科学系,湖南长沙410003 [2]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《稀有金属材料与工程》2007年第A01期833-836,共4页Rare Metal Materials and Engineering

基　　金：国防预研基金(51488030105ZS9504)

摘　　要：以二维碳纤维布、硅树脂先驱体、SiC微粉和乙醇溶剂为原料,采用PIP工艺制备了2DCf/Si-O-C材料,考察了浆料配比对材料力学性能和抗氧化性能的影响。结果表明:硅树脂/乙醇/SiC配比为3:1.2:1时所制备材料的力学性能较好,其弯曲强度和断裂韧性分别达到249MPa和12.7MPa·m1/2。与力学性能的变化趋势不同,随着浆料中SiC含量的增加,材料的抗氧化性能随之提高,硅树脂/乙醇/SiC配比为3:1.2:4时所制备材料在1300℃氧化10min后,弯曲强度和断裂韧性保留率分别达到了76.3%和83.9%,较未添加SiC微粉的2DCf/Si-O-C材料有明显提高。Two-dimensional carbon fiber cloth reinforced silicon oxycarbide （2D Cf/Si-O-C） composites were fabricated with Silicone Resin （SR） as precursors, ethanol as solvent and SiC as inert fillers by precursor infiltration pyrolysis（PIP）. The effects of SiC powder （SiCp） content on the mechanical properties and oxidation resistance of 2D Cf/Si-O-C composites were investigated. The results showed that the composites exhibited the best mechanical properties when the weight ratio of SR/ethanol/SiCp was 3：1.2：1 in the slurry, and the flexural strength and fracture toughness reached 249 MPa and 12.7 MPa.m^1/2, respectively. On the contrary, with the increase of the SiCp content, the oxidation resistance properties of the composites remarkably increased. When the principal material composition was SR： ethanol： SiCp=3：1.2：4（mass ratio）, after heated at 1300℃ for 10min in static air, the reservation ratio of flexural strength and fracture strength were 76.3% and 83.9%, respectively.

关 键 词：硅树脂 先驱体转化法 2DCf/Si-O-C材料 SIC微粉 力学性能 抗氧化性能 

分 类 号：TB302.4[一般工业技术—材料科学与工程]