Low Elastic Modulus β Ti-Nb-Si Alloys for Biomedical Applications

Abstract:

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We report on advanced β-titanium alloys having excellent biocompatibility without containing V or Al that has been known as a toxic element for human body, and on a low elastic modulus to be used in the fields of artificial joint and dental implant in the replacement of natural human bone. Martensite structure with α’ (hcp) or α”(orthorhombic) was observed in Ti-xNb-1.5at.%Si, where x=10-20at.%. The crystal structure of martensite formed from water quenching process was largely dependent upon Nb content but does not on Si content. On the basis of experimental results obtained, it is suggested that Si has an effective role to suppress the precipitation of ω phase leading to reduction in elastic modulus in the metastable β phase region. Metastable β phase region was superior to reduce the elastic modulus than stable β phase region in the present alloy system. The minimum value of elastic modulus was measured to 48GPa.

Info:

Periodical:

Materials Science Forum (Volumes 510-511)

Edited by:

Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee

Pages:

858-861

DOI:

10.4028/www.scientific.net/MSF.510-511.858

Citation:

W. Y. Kim et al., "Low Elastic Modulus β Ti-Nb-Si Alloys for Biomedical Applications", Materials Science Forum, Vols. 510-511, pp. 858-861, 2006

Online since:

March 2006

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Price:

$35.00

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