The Effect of Al on Phase Stability and Oxidation Behavior in Ternary Nb-Ti-Si Alloys

Yong Jun Jiang

doi:10.4028/www.scientific.net/AMM.556-562.310

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 556-562The Effect of Al on Phase Stability and Oxidation...

The Effect of Al on Phase Stability and Oxidation Behavior in Ternary Nb-Ti-Si Alloys

Abstract:

In this paper, we report a significant improvement in mechanical and oxidation properties of near eutectic Nb–Si alloys by the addition of aluminum (Al) and control of microstructural length scale. Thus in order to develop new alloys, we have to choose proper alloying elements keeping all the above issues in mind. Among the non-transition elements such as Al, Ga, Ge, Sn, and Al is most attractive from the point of view of enhancing the oxidation resistance and room temperature ductility due to substitution of Si with metallic Al . Al forms oxides which are even more thermodynamically stable than Si and Nb based oxides. Al is also soluble in Nb to a greater degree in conjunction with other refractory elementsFig.1 The figure shows composite X-ray diffraction patterns of each sample exposed to air for one hour in a TGA furnace at above mention temperatures.

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Periodical:

Applied Mechanics and Materials (Volumes 556-562)

Pages:

310-313

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.556-562.310

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Online since:

May 2014

Authors:

Yong Jun Jiang*

Keywords:

Nb–Si Alloys Elements Oxidation Behavior

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