纳米SiC粉末对先驱体陶瓷增材性能的影响  

Effect of Nano-Sized SiC Powder Filler on Additive Manufactured Properties of Precursor-Derived Ceramics

作　　者：王志永 赵宇辉[1,2,4] 赵吉宾 葛春华[5] WANG Zhi-yong;ZHAO Yu-hui;ZHAO Ji-bin;GE Chun-hua(Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China;School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Chemistry,Liaoning University,Shenyang 110036,China.)

机构地区：[1]中国科学院沈阳自动化研究所,辽宁沈阳110016 [2]中国科学院机器人与智能制造创新研究院,辽宁沈阳110169 [3]东北大学机械工程与自动化学院,辽宁沈阳110819 [4]中国科学院大学,北京100049 [5]辽宁大学化学院,辽宁沈阳110036

出　　处：《东北大学学报（自然科学版）》2021年第5期639-645,共7页Journal of Northeastern University(Natural Science)

基　　金：国家重点研发计划项目(2018YFB1105802);国家自然科学基金资助项目(51805526).

摘　　要：为了减少先驱体陶瓷在高温裂解过程中裂纹及孔隙的产生,研究了惰性填料纳米SiC粉末对先驱体聚合物、先驱体陶瓷体积收缩率、陶瓷产率的影响.利用热重分析(TGA)、傅里叶转化红外线光谱(FT-IR)、X射线衍射(XRD)等检测手段进行性能分析和结构表征,采用排水法计算先驱体陶瓷体积收缩率.结果表明:先驱体陶瓷的体积收缩率随纳米SiC粉末质量分数的增加而减小,先驱体陶瓷产率随纳米SiC粉末质量分数的增加而增加,当其质量分数为3%时,体积收缩率最小,为73.47%,先驱体陶瓷产率最大,为26.42%;在高温裂解过程中,当升温速率为4℃/min时,先驱体陶瓷表面无明显裂纹且平整光滑.SiC粉末作为惰性填料具有减少先驱体陶瓷体积收缩,提高陶瓷产率的作用,且效果明显.In order to reduce the generation of cracks and pores during the pyrolysis process of precursor-derived ceramics,the effects of the inert filler of nano-sized SiC powders on the precursor polymer,precursor-derived ceramics volume shrinkage,ceramic yield were studied.The features of precursor-derived ceramics with different mass fractions of SiC filler were examined by TGA,FT-IR and XRD technologies,and the volume shrinkage of the ceramics was measured by drainage method.The results showed that with the increasing mass fraction of SiC powders,the volume shrinkage of the precursor-derived ceramics decreased,while the yield of the ceramics increased.When the mass fraction was 3%,the volume shrinkage rate of the ceramics was down to the minimum value of 73.47%and the yield was up to the maximum one of 26.42%.During the pyrolysis process,when the heating rate was 4℃/min,the surface of the precursor-derived ceramics was flat and smooth without evident cracks.Therefore,the inert filler of the nano-sized SiC powders has great effects on reducing the volume shrinkage of precursor-derived ceramics and increasing the ceramic yield.

关 键 词：先驱体陶瓷 增材制造 惰性填料 体积收缩 陶瓷产率 

分 类 号：TQ174.75[化学工程—陶瓷工业]