利用酚醛树脂制备复杂形状碳化硅复合材料零件

崔志中; 李涤尘; 乔冠军; 雷贤卿; 侯红玲

利用酚醛树脂制备复杂形状碳化硅复合材料零件

1.
西安交通大学机械制造系统工程国家重点实验室西安 710049 ;
3.
河南科技大学机电学院, 洛阳 471003 ;
4.
西安交通大学金属材料强度国家重点实验室, 西安 710049 ;

基金项目: 国家自然科学基金(50475082) ; 陕西省科技攻关计划项目(2005K05- G3)

详细信息

通讯作者:
李涤尘, 教授, 博导, 从事先进制造技术和先进材料的研究　E-mail : dcli @mail . xjtu. edu. cn

中图分类号: TB332 ; TH16
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出版历程
- 收稿日期: 2006-01-19
- 修回日期: 2006-04-09
- 刊出日期: 2006-12-14

Preparation of complex-shape SiC ceramic composites partsderived from phenolic resin template

1.
The State Key Lab for Manufacturing Systems Engineering| Xipan J iaotong University| Xipan 710049| China ;
2.
School of Mechat ronics Engineering| Henan University of Science and Technology| Luoyang 471003| China ;
3.
The State Key Lab for Mechanical Behavior of Materials| Xipan J iaotong University| Xipan 710049| China ;
4.
Department of Machine &|Elect ronics Engineering| Shaanxi University of Technology| Hanzhong 723003| China

摘要

摘要: 为了解决复杂形状陶瓷构件成型难的问题, 利用光固化快速成型技术, 以酚醛树脂为原料, 制作了陶瓷复合材料构件。用XRD 分析了炭支架和陶瓷构件的物相组成; 应用TGA 和SEM 研究了生成炭支架的热解特性、孔道系统和陶瓷构件的微观组织结构; 建立了渗硅的反应机理模型。结果表明: 炭支架主要为酚醛树脂热解后生成的无定形碳, 其残碳率为65 %; 渗硅温度为1500 ℃时生成的陶瓷构件是由Si 、SiC 和C 组成的致密复相陶瓷; 渗硅后如果温度升高至1650 ℃进行排Si , 则生成多孔复相陶瓷; 光固化树脂网格结构和淀粉结合生成的孔道系统, 能够有效避免制件的破裂并有利于渗硅反应; 在1500 ℃温度渗硅30 min 得到的SiC 层厚为20μm。
- 陶瓷 /
- 碳化硅 /
- 模具 /
- 快速成型 /
- 热解
Abstract: Using phenolic resin as the raw material , complex-shaped component s , which were composed of SiC , Cand Si , were formed by stereolithography technology. X-ray diff raction was employed to analyze the phase of carbontemplates and ceramic components. The pyrolysis behaviors and the forming mechanism of the porous system werestudied with thermo-gravimet ric analysis. The microst ructures of the ceramic component s were observed with scanning elect ron microscope. A model of the mechanism of reactive infilt ration of Si into the carbon template was built .The carbon templates obtained by the pyrolysis of phenolic resin precursor possess amorphous state st ructures , andthe residual carbon is 65 wt %. The ceramic component s obtained at 1500 ℃ by reactive infilt ration of Si are denseceramics containing SiC , C and Si. At 1650 ℃the ceramics are porous ceramics. The porous system formed by photocurable resin st ructures and starch powders could effectively prevent the carbon templates from breaking andcracking and facilitate penet rating Si to the carbon templates to form SiC. The thickness of SiC obtained at 1500 ℃for 30 min is 20μm.
- ceramic /
- SiC /
- mould /
- rapid prototype /
- pyrolysis