AVALIAÇÃO DA HOMOGENEIZAÇÃO DE LIGA Ti35Nb PROCESSADA POR METALURGIA DO PÓ E EXTRUSÃO ANGULAR EM CANAL

Blas, Juan Garcia de; Lunz, Juliana do Nascimento; Guzela, Laercio Rosignoli; Ribeiro, Alexandre Antunes; Pereira, Luiz Carlos; Oliveira, Marize Varella de; Barbosa, Cássio

doi:10.5151/1516-392x-27738

Cited by 1 publication

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References 13 publications

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“…Further, all substrates were cleaned by a sequence of ultrasonic bath, in order to eliminate the superficial organic impurities, and air-dried in a oven for 1 hour at 60ºC. Such processing parameters were based on previous works [7,18]…”

Section: Processing Of Ti-35nb Substratesmentioning

confidence: 99%

Characterization of Ti-35Nb alloy surface modified by controlled chemical oxidation for surgical implant applications

Silva

Ribeiro

2019

Matéria (Rio J.)

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Titanium-Niobium alloys have been studied for biomedical applications due to their satisfactory biocompatibility. In order to improve the long-term implantation, surface modification techniques have been developed to generate suitable topography, roughness, chemical composition, surface energy, etc. Considering this approach, the present work aimed to characterize Titanium-35Niobium (Ti-35Nb) surface modified by controlled chemical oxidation. Ti-35Nb (wt%) substrates were processed by powder metallurgy. The powders were mechanically mixed, uniaxially cold pressed and sintering at 1300ºC/2h. Then, the sintered substrates were immersed in a solution consisting of equal volumes of concentrated H 2 SO 4 and 30% aqueous H 2 O 2 for 4 hours at room temperature under continuous agitation. Sample characterizations were performed by scanning electron microscopy, profilometry, contact angle measurement, X-ray diffraction, and X-ray photoelectron spectroscopy. The results showed that the samples exhibited a microporous structure with micro-roughness on surface, and the β-Ti phase was stabilized by complete niobium atoms diffusion in titanium matrix. In addition, the chemical treatment successfully modified the Ti-35Nb surface with micropore formation and enhancement of hydrophilic feature and TiO 2 and Nb 2 O 5 layer, which can improve the biocompatibility of TiNb alloy implants.

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Section: Processing Of Ti-35nb Substratesmentioning

confidence: 99%