航空材料学报2026，Vol.46Issue(4)：64-72,9.DOI:10.11868/j.issn.1005-5053.2024.000177
增材制造-热压注复合成型铝-硅基陶瓷型芯
Alumina-silica based ceramic cores prepared by additive manufacturing-hot press injection composite molding
王玥 1李鑫 1牛书鑫 1周婷婷 1司远 1王珂 1石振梅 1于千思一 1骆宇时1
作者信息
- 1. 中国航发北京航空材料研究院 先进高温结构材料重点实验室,北京 100095
- 折叠
摘要
Abstract
Ceramic cores are key transfer components for single crystal superalloy hollow turbine blades in aeroengines.To address the insufficient impact resistance of the fine structures in ceramic cores,this work innovatively adopts photocuring additive manufacturing to develop a composite-formed alumina-silica based ceramic core.Dense α-Al2O3 phase ceramic fine structural components are produced,with dimensional accuracy and three-point bending strength reaching±0.003 mm and 314 MPa,respectively,exhibiting excellent impact resistance.The main body of the ceramic core,which encapsulates the alumina-based ceramic components via hot injection molding,has a bending strength of 12 MPa and an apparent porosity of 29.5%,ensuring favorable collapsibility and leachability.The relationship between the separation gap width of the heterogeneous alumina-silica material interface and the thermal expansion coefficient,shrinkage rate,and elastic modulus of two materials is established.Micro-texture design on the surface of additively manufactured alumina-based ceramic components is adopted to form an interlocking alumina-silica interface microstructure on the composite-formed ceramic core,which improves the physical bonding strength of the heterogeneous interface and effectively compensates for interfacial separation during thermal processes.Basic casting verification of single-crystal hollow turbine blades is achieved using the composite-formed alumina-silica based ceramic core,with high dimensional conformity of process holes and no excess metal in the inner cavity.It demonstrates broad application prospects in the precision casting of superalloy blades for aeroengines.关键词
精密铸造/陶瓷型芯/增材制造/热压注/异质界面Key words
precision casting/ceramic core/additive manufacturing/hot pressing injection/heterogeneous interface分类
化学化工引用本文复制引用
王玥,李鑫,牛书鑫,周婷婷,司远,王珂,石振梅,于千思一,骆宇时..增材制造-热压注复合成型铝-硅基陶瓷型芯[J].航空材料学报,2026,46(4):64-72,9.
