硅酸盐通报2025，Vol.44Issue(2)：666-678,13.DOI:10.16552/j.cnki.issn1001-1625.2024.0919
光固化3D打印Csf/SiC坯体的显微结构与力学性能
Microstructure and Mechanical Properties of 3D Printed Csf/SiC Green Body Based on Vat Photopolymerization
摘要
Abstract
Short cut carbon fiber reinforced silicon carbide composite(Csf/SiC)is a kind of high-performance ceramic matrix composite.Vat photopolymerization 3D printing can make up for the shortcomings of traditional process in the precision manufacturing of complex fine structure Csf/SiC components.In this paper,the photosensitive resin based Csf/SiC slurry was prepared with short cut carbon fiber(Csf),silicon carbide(SiC)micropowder and photosensitive resin.The test strips(A and B)with the movement direction of the scraper parallel to and perpendicular to the length direction of the test strip were obtained by the Vat photopolymerization 3D printing process.The changes of bending strength,Weibull modulus,size and weight of the two kinds of test strips before and after debonding were compared.The results show that the A test strip has higher strength and structural uniformity,and its density,bending strength and Weibull modulus are 1.81 g/cm3,10.68 MPa and 13.22,respectively.After debonding,the density,bending strength and Weibull modulus of the green body decrease to 1.40 g/cm3,7.32 MPa and 9.45,respectively.The debonding shrinkage in X,Y,Z direction are 1.22％,3.35％and 4.24％,respectively.The brittleness of the green body increases and the toughness decreases.The chemical vapor infiltration(CVI)process can achieve the densification,toughening and homogenization of Csf/SiC samples.The weight of debinded Csf/SiC samples after CVI carburization increases about 50％,and the density,compactness,bending strength and Weibull modulus are 2.02 g/cm3,93.88％,121.22 MPa and 21.04,respectively.关键词
Csf/SiC/3D打印/光固化/显微结构/力学性能/化学气相渗透Key words
Csf/SiC/3D printing/Vat photopolymerization/microstructure/mechanical property/chemical vapor infiltration分类
化学化工引用本文复制引用
胡传奇,王功,李珊,靳宝杰,刘兵山,洪义强,戴珍,汪体园,王爽..光固化3D打印Csf/SiC坯体的显微结构与力学性能[J].硅酸盐通报,2025,44(2):666-678,13.基金项目
HY陶瓷基复合材料快速制备技术(T3144011XN) （T3144011XN）
