陕西科技大学学报2026，Vol.44Issue(2)：153-162,10.
基于直写成型的仿生结构氧化铝基陶瓷型芯的制备及其性能研究
Study on preparation and performance of bionic-structured alumina-based ceramic cores fabricated by direct ink writing
摘要
Abstract
To address the problems of conventional ceramic-core fabrication's inability to a-chieve high-precision forming of complex structures,and the issue of the low leaching effi-ciency of alumina-based ceramic cores,biomimetic vascularstructured alumina ceramic cores were fabricated via direct ink writing,and the key process parameters were systematically in-vestigated.Under optimized conditions,printing pressures of 25 Psi and 35 Psi,a nozzle inner diameter of 0.41 mm.printing speeds of 20 mm·s-1 and 25 mm·s-1,and a layer height of 0.5 mm,both threelayer and fourlayer ceramic cores satisfy the roomtemperature flexural strength requirements,with the flexural strength of fourlayer ceramic cores(Sample 2)a-chieving 15.84 MPa.Total porosities exceeding 30％(45.14％for the threelayer and 43.24％for the fourlayer structures)provide an optimal balance between mechanical integri-ty and leachability.Leaching tests demonstrate that the biomimetic channel architecture en-hances alkali infiltration and increases reactive surface area,resulting in a leaching rate of 0.133 1％·h-1,significantly outperforming both sandwich and solid configurations.Re-search demonstrates that biomimetic vascular alumina-based ceramic cores are obtained by di-rect ink writing,which achieves high-precision molding of complex structures while maintai-ning excellent mechanical properties and leaching efficiency.This results present a novel process for applications such as aircraft engine blades.关键词
直写成型/仿生结构/氧化铝基陶瓷型芯/增材制造Key words
direct ink writing/bionic structures/aluminabased ceramic cores/additive manu-facturing分类
轻工纺织引用本文复制引用
江红涛,王昊,王莉丽,杨昕昊..基于直写成型的仿生结构氧化铝基陶瓷型芯的制备及其性能研究[J].陕西科技大学学报,2026,44(2):153-162,10.基金项目
国家自然科学基金项目(51402179) （51402179）
陕西省科技厅自然科学基金项目(2024JC-YBMS-444) （2024JC-YBMS-444）
陕西省西安市科技计划项目(23ZDCYJSGG0046-2022) （23ZDCYJSGG0046-2022）
