熔融沉积(FDM)工艺参数对SiC陶瓷微观结构和力学性能影响  

Effect of Fused Deposition Modeling(FDM) Process Parameters on Microstructure and Mechanical Properties of SiC Ceramics

作　　者：胡祥芬 牛富荣 周哲 杨现锋 刘业[2,3] 郭金玉 刘鹏 徐协文 Hu Xiangfen;Niu Furong;Zhou Zhe;Yang Xianfeng;Liu Ye;Guo Jinyu;Liu Peng;Xu Xiewen(College of Materials Science and Engineering,Changsha University of Science and Technology,Changsha Hunan 410114,China;State Key Lab of Powder Metallurgy,Central South University,Changsha Hunan 410083,China;Shenzhen Uprise 3D Technology Co.,Ltd.,Shenzhen Guangdong 518107,China)

机构地区：[1]长沙理工大学材料科学与工程学院,湖南长沙410114 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083 [3]深圳升华三维科技有限公司,广东深圳518107

出　　处：《硬质合金》2021年第3期201-210,共10页Cemented Carbides

基　　金：湖南省大学生创新训练项目《特种陶瓷3D打印成型设备及耗材》(S201910536036);长沙理工大学青年教师成长计划项目《Cf/ZrB2-ZrC-SiC超高温陶瓷基复合材料制备及机理研究》(2019QJCZ003);长沙理工大学科研启动基金(00020171124)。

摘　　要：为提高熔融沉积成型(FDM)碳化硅(SiC)陶瓷的质量,本文主要研究工艺参数(料筒温度、喷嘴直径和打印层厚)对SiC陶瓷表面形貌、微观结构和力学性能的影响。结果表明:在料筒温度180℃、喷嘴直径0.8 mm和打印层厚0.2 mm时可获得稳定可控的挤出流量,SiC生坯和烧结体微观结构致密,层间结合效果好。SiC烧结体密度为3.18 g/cm^(3),达到理论密度的99%,抗弯强度为302 MPa左右。成功制备了具有复杂几何形状和可控尺寸精度的SiC生坯,研究结果为3D打印SiC陶瓷工艺参数的制定提供了参考依据。To improve the quality of fused deposition molding(FDM) silicon carbide(SiC) ceramics,the effects of process parameters(barrel temperature,nozzle diameter and layer thickness) on the surface morphology,microstructure and mechanical properties of SiC ceramics were studied in this paper.The results show that a stable and controllable extrusion flow rate can be obtained at the barrel temperature of 180℃,the nozzle diameter of 0.8 mm and the layer thickness of 0.2 mm,and the green body and sintered body have dense microstructure and good interlayer bonding.The density of sintered SiC body is 3.18 g/cm^(3),which reaches 99% of the theoretical density,and the bending strength is about 302 MPa.The green SiC body with complex geometry and controlled dimensional accuracy are successfully prepared,and the research results provide a reference for the development of process parameters for 3D printing of SiC ceramics.

关 键 词：熔融沉积成型 3D打印 工艺参数 SiC 力学性能 

分 类 号：TQ174.758.12[化学工程—陶瓷工业]