Microstructure and mechanical characterization of Ti-Cu alloys for dental applications / Caracterização microestrutural e mecanica de ligas Ti-Cu para aplicações odontologicas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Due to characteristics like high strength-to-weight ratio, high biocompatibility, enhanced corrosion resistance and the possibility of controlling elastic behavior by proper addition of alloying elements, the use of titanium by medical and dental industries is continuously growing. In this work, Ti-Cu alloys with a Cu content varying from 5% to 15 wt% were prepared by arc melting and cast in copper molds. The high cooling rate imposed by copper mold led to the formation of a completely martensitic structure. Following, the microstructure of these samples were modified by applying proper heat treatments, leading to more stable microstructures. The samples characterization includes microstructure analyzes through optical and scanning electron microscopy, X-ray diffraction method and mechanical tests. The results obtained suggest that application of high cooling rates resulted in the formation of a´metastable phase. As Cu content was increased, hardness also increased due to Ti2Cu intermetallic compound precipitation. The Ti2Cu compound was found to present lower elastic modulus than the modulus of a phase. Finally, it was found that the heat treated samples presented high ductility and their mechanical behavior is affected by porosities

ASSUNTO(S)

dental prosthesis fundição de precisão ligas de titanio investment casting ligas de titanio - tratamento heat treatment protese dentaria titanium alloy

ACESSO AO ARTIGO

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