难熔金属加入对炭/炭复合材料抗氧化性能的影响  

Influence of introducing refractory metals on the oxidation resistance of carbon/carbon composites

作　　者：颉天 迟伟东[1] 刘辉[1] 于建民[1] 

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《炭素技术》2014年第1期1-4,38,共5页Carbon Techniques

摘　　要：合成了一种新型含锆先驱体,采用液相浸渍-炭化工艺循环制备含锆C/C复合材料,借助红外扫描、热失重分析、X射线衍射等检测手段对先驱体热处理过程中的结构变化进行分析;对复合材料进行恒温氧化失重率测定,并采用扫描电子显微镜观察氧化前后复合材料的微观形貌。结果表明:锆元素在复合材料中分布较为均匀,在1 000℃处理后形成C/C-ZrO2复合材料,这种复合材料的起始氧化温度可达631.1℃,较纯C/C复合材料的氧化温度提高了约300℃,且ZrO2含量增加能显著提升复合材料的抗氧化性能。A new zirconium-containing liquid precursor was synthesized for the preparation of C/C composites by PIP method, FT- , IR, TG and XRD were applied to analyze the structure transformations of precursor during heating treatment. The weight loss rate of composites was examined at certain oxidization temperature. SEM was used to analyze the microstrueture of composites before and after oxidization experiment. The results show that zirconium was well-distributed in the composites, and C/C- ZrO2 composites were prepared after 1 000 ℃ treatment, whose starting oxidization temperature was 631.1℃, higher 300 ℃ than pure C/C composites. Be- sides, the anti-oxidant performance can be greatly enhanced with higher content of ZrO2 in the composites.

关 键 词：C C复合材料 先驱体 基体改性 抗氧化 

分 类 号：TB33[一般工业技术—材料科学与工程]