Interface Reaction between Directional Solidified Superalloy DZ40M and Ceramic Mould

Abstract:

The interfaces between DZ40M directional solidified superalloy and ceramic mould (SiO₂-base core and Al₂O₃-base shell) was studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that there was a serious interface reaction between DZ40M and ceramic cores，which resulted in many reaction pits (~100μm deep), Si rich residue alloys and Zr rich subglobose oxides on the inner surface. And the interface reaction between DZ40M and ceramic shell induced a ~50μm of pink sand burning layer. The thermal analysis showed that the reactions between DZ40M and core or shell were similar: the active alloy constituents (Zr, Al, Ti and Cr) were oxidized and became oxides or solid solution with the core or shell components (SiO₂, Al₂O₃ or Fe₂O₃), but the interface characterization of DZ40M/core and DZ40M/shell was different because the shell had the main content of Al₂O₃ and impurity of Fe₂O₃, while those of the core were SiO₂ and CaO, respectively.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 235-242
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.235
• Online since: June 2021
• Authors: Li Li Wang*, Jian Sheng Yao, Guo Hong Gu, Xin Li, Shu Xin Niu, Zeng Li Wang
• Keywords: Al₂O₃-Base Ceramic Shell, Cobalt Base Superalloy DZ40M, Interface Reaction, SiO₂-Base Ceramic Core

References

[1] D. R. Taarea, W. F. Gale, J. W. Fergus, Reactions between constituents of two molten nickel-base superalloys and ceramic materials, Proc. Join.Adv. Spec. Mater.10(2003)13-15.

[2] T. M. Pollock，S. Tin, Nickel-based superalloys for advanced turbine engines: chemistry, microstructure and properties, J. Propul. Power, 22(2006)361-374.

DOI: 10.2514/1.18239

[3] S. J. Yao, D. Z. Tang, X. G. Liu et al.Interface reaction between DD6 single crystal superalloy and ceramic mold, J. Aeronaut. Mater. 35 (2015) 1-7.

[4] L. Zheng, C.B. Xiao, G.Q. Zhang, G.H. Gu, X. Li, X.G. Liu, M. Xue, D.Z. Tang, Investigation of interfacial reaction between high Cr content cast nickel based superalloy K4648 and ceramic cores, J. Aeronaut. Mater. 32 (2012) 10-22.

[5] X.Y. Chen, Y.Z. Zhou, T. Jin, X.F. Sun, Effect of carbon on wettability and interface reaction between melt superalloy and ceramic material, MATEC Web Conf. 14 (2014) 13008.

DOI: 10.1051/matecconf/20141413008

[6] F. Valenza, M.L. Muolo, A. Passerone, Wetting and interactions of Ni- and Co based superalloys with different ceramic materials, J. Mater. Sci. 45 (2010)2071-2079.

DOI: 10.1007/s10853-009-3801-4

[7] Q. Li, J.X. Song, D.G. Wang, Q. Yu, C.B. Xiao, Effect of Cr, Hf and temperature on interface reaction between nickel melt and silicon oxide core, Rare Met. 30(2013) 405-409.

DOI: 10.1007/s12598-011-0313-6

[8] M. Xue. Study on ceramic-superalloy interface reactions during the directional solidification processing, Tsinghua University, (2007).

[9] Y. Zi, J. Meng, C. W. Zhang et al. Effect of Y content on interface reaction and wettability between a nickel-base single crystal superalloy melt and ceramic mould, Journal of Alloys and Compounds 789 (2019) 472-484.

DOI: 10.1016/j.jallcom.2019.03.037

[10] L. L. Wang, J. R. Li, D. Z. Tang, S. Z. Liu, Interfacial reactions between SiO2-ZrO2 ceramic core and DZ125, DD5, DD6 casting superalloys, J. Mater. Eng. 44 (2016) 9-14.

[11] Y.J. Liang, Thermochemical Date of Inorganics, Northeastern University Press, Shenyang, (1993).