Improvement of Oxidation Resistance of A NiAl Eutectic Alloy Doping with Dy

Article Preview

Abstract:

The isothermal oxidation behavior of NiAl-30.9Cr-3Mo-0.1Dy alloy has been investigated in the paper. The results reveal that Dy-addition significantly improves the oxidation resistance, which is attributed to the formation of continuously compact Al2O3 layer and rich-Cr transition layer on the surface of the tested alloy.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

1263-1268

Citation:

Online since:

October 2010

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2010 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Darolia R. NiAl Alloys for High-Temperature Structural Applications. JOM, 1991(43): 44.

DOI: 10.1007/bf03220163

Google Scholar

[2] Miracle D B. The physical and mechanical properties of NiAl. Acta. metal. Mater, 1993(41): 649.

Google Scholar

[3] Xu Chun-mei, Guo Jian-ting. Influence oh high temperature heat treatment on microstructure and microhardness of (DS) NiAl-Cr(Mo)-Hf eutectic alloy. Acta Metallurgica Sinca, 40(1), 2004, 57-61.

Google Scholar

[4] Xia D S, Li B, Li B Z, et al, Investigation on mechanical alloy of NiAl(Co)-TiC powder. Journal of Materials Engineering, suppl. 2002, 370.

Google Scholar

[5] Nicholls JR, Stephenson DJ. High temperature coatings for gas turbines. Intermetallic compounds: Principles and practice, 1995: 489.

Google Scholar

[6] Doychack J. Oxidation behaviour of high-temperature inter-metallics. Intermetallic compounds: principles and practices. 1995: 1: 977.

Google Scholar

[7] Xu Chun-mei, Guo Jian-ting. Effect of Nickel Aluminide Microcrystalline Coating on High-Temperature Oxidation Behavior of NiAl-33. 5%Cr-0. 5%Zr Alloy. Corrosion Science section, 2003(4): 350.

DOI: 10.5006/1.3277567

Google Scholar

[8] Wu Y, Hwang SK, Nam SW, et al. The effect of yttrium addition on the oxidation resistance of EPM TiAl-based intermetallics. Scripta Materialia. 2003(48): 1655-1660.

DOI: 10.1016/s1359-6462(03)00134-9

Google Scholar

[9] Guo Jian-ting, Xu Chun-mei. Effect of NiAl microcrystalline coating on the high temperature oxidation behavior of NiAl-28Cr-5Mo-1Hf alloy. Oxide Met, 2002(58): 457.

Google Scholar

[10] Gonzalez-CarrascoJL, Perez P, Adeva P, et al, Oxidation behaviour of an ODS NiAl-based intermetallic alloy. Intermetallics 1999(7): 69-78.

DOI: 10.1016/s0966-9795(98)00012-0

Google Scholar

[11] Zhang YG, Han YF, Chen GL, et al, Structural Materials and Intermetallics. Natural Defence of Press, Beijing, 2001:534.

Google Scholar

[12] Mahaton KH (Germen), The Science and Technology of Materials. Vol(8), Science Press, 1999:529.

Google Scholar

[13] Zou ZH (American), The Science and Technology of Materials. Vol(13), Science Press, 1999: 22.

Google Scholar

[14] Li. MS, The Corrosion of Metals at High Temperatures. Metallurgical Industry Press, 2001: 263.

Google Scholar