Effect of sintering temperature on ceramic cores performances of SiO2-ZrO2 system

被引：2

作者：

Liu X.-G. ^{[1
]}

Qi C.-J. ^{[1
]}

He L.-L. ^{[2
]}

Tang D.-Z. ^{[1
]}

Xiao C.-B. ^{[1
]}

Yao J.-S. ^{[1
]}

Gu G.-H. ^{[1
]}

Li X. ^{[3
]}

机构：

[1] Beijing Institute of Aeronautic Materials

[2] Avic South Aviation Industry Limited Corporation

[3] Tianjin University

来源：

Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | 2011年 / 31卷 / 05期

关键词：

Ceramic cores; Engine; Hollow blades; Hot-pressure casting; Superalloy;

D O I：

10.3969/j.issn.1005-5053.2011.5.012

中图分类号：

学科分类号：

摘要：

The easy leachable SiO2-ZrO2 ceramic cores used in directional solidification and single crystal hollow blades were prepared by traditional hot-pressure casting. The results show that the a sintering shrinkage increased with the increasing sintering temperature from 1150°C to 1250°C, and sintering shrinkage is increased markedly above 1200°C. Well-grown crystalline grains were shown, and main compositions are composed with non-crystal silica, cristobalite and zirconia. The material properties sintering at 1200°C are optimized, and bending strengths reach 42.9MPa, and best anti-deformation and bending strengths are also obtained at 1550°C. High temperature anti-deformation is 0.1mm, and the high temperature bending strength, pore, density and sintering shrinkage are 27.9MPa, 30.4%, 1.92g/cm3 and 0.4% respectively. The formations of cristobalite is about 20%. It meets the pouring requirement for superallay hollow turbine blades of the aero-engine.

引用

页码：62 / 65

页数：3

共 12 条

[1] 23, 2, pp. 80-8, (2002)
[2] (1984)
[3] 5, pp. 20-31, (1995)
[4] 8, pp. 711-713, (2007)
[5] Hao C.H.C., Lu H.Y., Optimal composition of zircon-fused silica ceramic cores for casting superalloys, J American Ceramic Society, 85, 4, pp. 773-779, (2002)
[6] Miller J.J., Eppink D.L., Loxley T.A., Et al., Cores for Investment Casting Process, (1978)
[7] 2, pp. 44-45, (1994)
[8] (1980)
[9] 8, pp. 758-760, (2005)
[10] Wu H., Li D., Tang Y., Et al., Rapid fabrication of alumina-based ceramic cores for gas turbine blades by stereolithography and gelcastin, Journal of Materials Processing Technology, 209, pp. 5886-5891, (2009)

← 1 2 →