三维打印结合反应烧结制备多孔氮化硅陶瓷.pdf

· 三维打印结合反应烧结制备多孔氮化硅陶瓷／翁作海等 5 · 三维打印结合反应烧结制备多孔氮化硅陶瓷。 翁作海，曾庆丰，谢聪伟，彭军辉，张瑾 (西北工业大学超高温结构复合材料重点实验室，西安710072) 摘要 以硅粉(Si)为起始原料，糊精为粘结剂，采用三维打印(3DP)快速成型技术制备出多孔硅坯体，通过反 应烧结得到高孔隙率的氮化硅(Si3N。)陶瓷。研究了反应烧结工艺对3DP多孔SisN。陶瓷性能的影响。结果表明： 陶瓷。反应烧结后，样品的线收缩率小于2．o％。三维打印结合反应烧结法实现了复杂形状陶瓷构件的无模制造与 净尺寸成型。 关键词 三维打印 反应烧结多孔氮化硅孑L隙率净尺寸成型 中图分类号：TB321 文献标识码：A PorousSiliconNitrideCeramics 3D andReaction Preparedby Printing Sintering WENG Zuohai，ZENG Junhui，ZHANG Qingfeng，XIECongwei，PENG Jin and onThemlostructuralMaterials (Science Technology Composite Laboratory， Northwestem 710072) P01)rtechnicalUIliversity，)(i’an Abst愀t silicon as materialanddextrinas siIicon was Using powderstarting binder，porousgreenbody pre— via3D then siliconnitrideceramicwasobtainedreaction pared printingtechnology，andhighlyporous by sintering． Theinfluenceof onthe ofthe3DP was Theresultsshow sinteringprocessproperty porousSi3N4 investigated． that， whenthesilicon was the3D followedthe greenbody preparedby printer by step—by。stepheatingprocess，porous N4ceramicwithflexural of(5．1±O．3)MPaand of(74．3±0．6)％wasobtained．Afterreaction Si3 strength porosity of were than with linear the smaller2．O％．Ceramic can