Production of Ti-13Nb-13Zr alloy for surgical implants by powder metallurgy

Autor(es)

Henriques, V. A. R. ^[1] ; Galvani, E. T. ^[2] ; Petroni, S. L. G. ^[1] ; Paula, M. S. M. ^[2] ; Lemos, T. G. ^[3]

Afiliação do(s) autor(es)

^[1] CTA, IAE, Div Mat, AMR, BR-12228904 Sao Jose Dos Campos, SP - Brazil

^[2] CTA, ITA, BR-12228904 Sao Jose Dos Campos, SP - Brazil

^[3] Escola Engn Lorena, Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Science; v. 45, n. 21, p. 5844-5850, NOV 2010.
• Citações Web of Science: 28

Resumo

The Ti-13Nb-13Zr near-beta alloy was developed aiming the replacement of the traditional Ti-6Al-4V alloy in surgical implants owing to its larger biocompatibility. Samples of this alloy were obtained using the blended elemental technique from hydrided powders. The isochronal sintering of the compacts for 2 h was carried out in the range 900-1,400 A degrees C with a heating rate of 20 A degrees C min(-1). In this work, the behavior of the elementary powders during sintering and the corresponding microstructural evolution were investigated. The alloy was characterized by means of scanning electron microscopy (SEM) in the backscattered mode, X-ray diffraction, and density measurements. The results indicate that the homogenization of the alloy is diffusion-controlled. With increasing temperature, homogenization of the alloy takes place and a fine plate-like alpha + beta structure is found throughout the microstructure in temperatures above 1,300 A degrees C. The process variables were defined aiming to minimize interstitial pick-up (C, O, and N) and avoiding intensive grain growth. (AU)

• Processo FAPESP: 08/04268-0 - Estudo sobre a influência dos teores de elementos intersticiais no processo de obtenção de ligas de titânio por metalurgia do pó
• Beneficiário: Vinicius André Rodrigues Henriques
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 04/07664-2 - Obtencao da liga ti-13nb-13zr via metalurgia do po para utilizacao em implantes ortopedicos.
• Beneficiário: Vinicius André Rodrigues Henriques
• Modalidade de apoio: Auxílio à Pesquisa - Regular