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Making Combinatorial Libraries of Titanium Based Alloys by Direct Metal Deposition Technique

Published online by Cambridge University Press:  26 February 2011

Natalia Pimenova  and
Thomas L. Starr
Natalia Pimenova
Affiliation:
[email protected], University of Louisville, Chemical Engineering Department, Ernst hall, Louisville, Ky, 40292, United States, 412 5313622
Thomas L. Starr
Affiliation:
[email protected], University of Louisville, Chemical Engineering Department, United States
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Abstract

α/β type titanium alloys, such as Ti-6Al-4V and Ti-6Al-7Nb, have been used for orthopedic implant materials because of their combination of biocompatibility, corrosion resistance and mechanical properties. However, toxicity of alloying elements is a concern.

In this project, it is proposed to design the new type of titanium alloys composed of non-toxic elements, such as Ti, Al, and Fe with lower modulus of elasticity and greater corrosion resistance. To find the optimal ratio of components in the Ti-Al-Fe system is important. The composition of the alloy determines its properties. Using combinatorial approach the optimal ratio can be found relatively easily.

Direct metal deposition (DMD) is a novel precise manufacturing process for fabricating metal parts directly from Computer Aided Design (CAD) solid models. The DMD process allows making several layers of different composition on one substrate. One sample includes several Ti-xAl-yFe alloys at once. This combinatorial library dramatically reduces the time and cost of the investigation.

The structure, mechanical and electrochemical properties of each new composition was studied using scanning electron microscopy (SEM) with energy-dispersive X-ray fluorescence analyzer (EDAX ZAF®), and electrochemical polarization method.

Keywords

Ticorrosioncombinatorial synthesis
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 894: Symposium LL – Combinatorial Methods and Informatics in Materials Science , 2005 , 0894-LL03-23
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

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