摘要
黏结剂微喷射黏结增材制造技术可成形任意形状陶瓷坯体,但坯体烧结后的致密度和强度低、表面较粗糙。采用纳米氧化锆分散液代替常规有机黏结剂作为喷射溶液,研究纳米氧化锆分散液喷射量对微喷射黏结增材制造氧化锆陶瓷烧结性能的影响规律及其机理。当纳米氧化锆分散液喷射量(体积分数)从0增加至175%时,氧化锆陶瓷烧结线收缩率和表面粗糙度显著减小,其减小幅度分别为6%~8%、57%,而致密度、抗弯强度和硬度明显增加,其增加幅度分别为18.1%、124.0%和187.0%。纳米氧化锆分散液喷射后,纳米氧化锆颗粒填充氧化锆粉层孔隙,提高了氧化锆坯体致密度,从而改善氧化锆陶瓷烧结质量,这为快速制造复杂致密的陶瓷零部件提供了新方法。
The ceramic green bodies with different structures can be formed via binder micro-jetting and bonding additive manufacturing technology.However,the density,strength and surface quality of the sintered ceramic bodies are low.The nanozirconia suspension was used as a jet solution to substitute a conventional organic binder,and the effect of nanozirconia suspension jet amount on the properties of additive manufactured zirconia ceramics after sintering was investigated.When the nanozirconia suspension jet amount increases from 0 to 175%,the line shrinkage and surface roughness of sintered zirconia ceramics decrease significantly,and the reduction rates are 6%-8%and 57%,respectively,while the relative density,flexural strength and hardness increase considerably,and the increase rates are 18.1%,124.0%,and 187.0%.The nano-sized zirconia particles can fill in the pores of the zirconia powder layer after introducing the nanozirconia suspension,thus improving the green density and the sintering quality of the zirconia ceramic.This provides an effective method for rapid manufacturing complex and compact ceramic parts.
作者
赵火平
李士伟
汪阿金
肖叶龙
刘少鹏
季德惠
沈明学
ZHAO Huoping;LI Shiwei;WANG Ajin;XIAO Yelong;LIU Shaopeng;JI Dehui;SHEN Mingxue(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,Jiangxi,China;Key Laboratory of Conveyance and Equipment,Ministry of Education,East China Jiaotong University,Nanchang 330013,Jiangxi,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2022年第9期2406-2413,共8页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51805170)。
关键词
微喷射黏结
氧化锆
增材制造
致密度
力学性能
micro-jetting and bonding
zirconia
additive manufacturing
relative density
mechanical properties
