RMI-PIP法快速制作高致密度碳化硅复杂结构零件  

Rapid Manufacture of High Relative-density and Complex Structure Components of Silicon Carbide by RMI–PIP Process

作　　者：陆峰[1] 鲁中良[1] 李涤尘[1] 曹继伟[1] 王嵽显[1] 张安峰[1] 

机构地区：[1]西安交通大学机械工程学院、机械制造系统工程国家重点实验室,西安710049

出　　处：《硅酸盐学报》2013年第9期1180-1184,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51005177);中央高校基本科研业务费专项资金资助项目

摘　　要：基于光固化成型技术和凝胶注模方法,制造出以酚醛树脂为碳源的有机物原型件。采用反应熔渗和先驱体浸渍(RMI)–裂解法(precursor impregnation and pyrolysis,PIP)制作出高致密度碳化硅陶瓷复杂结构零件。研究了PIP工艺参数对零件致密化及抗弯强度的影响。采用扫描电子显微镜、差示扫描量热法和X射线衍射分析研究了先驱体浸渍剂组分、热解温度和保温时间对碳化硅形成过程及抗弯强度的影响。结果表明:浸渍剂组分和热解工艺对裂解产物的析晶行为有重要影响;采用纳米SiC颗粒的先驱体浸渍剂可显著提高SiC陶瓷的致密度和抗弯强度;采用RMI-PIP法成功制作出密度为3.03g/cm3、室温抗弯强度为214.4MPa的碳化硅空心涡轮叶片等样件。The organics prototypes were fabricated with phenolic resin as a carbon source based on the stereolithography and gelcast-ing theory. A high density silicon carbide （SiC） ceramic component was prepared rapidly via the reactive melt infiltration （RMI） and precursor impregnation and pyrolysis （PIP）. The major parameters related to the densification and the flexural strength in the PIP process were investigated. Besides, the influences of the composition of precursor impregnating agent, parolysis temperature and holding time on the formation of SiC and the flexural strength were analyzed by scanning electron microscopy, differential scanning calorimetry and X-ray diffraction, respectively. The results show that the composition of precursor impregnating agent and pyrolysis processes have significant effects on the crystallization of the pyrolysis products. The density and flexural strength of ceramic materials are definitely improved when SiC nano-particles are used as a precursor impregnating agent. The hollow blades of SiC with the bulk density of 3.03 g/cm3 and the flexural strength of 214.4 MPa at room temperature are fabricated by the RMI-PIP process.

关 键 词：反应熔渗 聚碳硅烷 致密化 涡轮叶片 

分 类 号：TB332[一般工业技术—材料科学与工程]