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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/9433
Título: 
Wear resistance of experimental titanium alloys for dental applications
Autor(es): 
Instituição: 
  • Universidade de São Paulo (USP)
  • Universidade Estadual Paulista (UNESP)
ISSN: 
1751-6161
Financiador: 
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Número do financiamento: 
  • FAPESP: 05/58363-5
  • FAPESP: 07/00059-7
Resumo: 
The present study evaluated microstructure, microhardness and wear resistance of experimental titanium alloys containing zirconium and tantalum. Alloys were melted in arc melting furnace according to the following compositions: Ti-5Zr, Ti-5Ta and Ti-5Ta-5Zr (%wt). Hemispheres and disks were obtained from wax patterns that were invested and cast by plasma. Microstructures were evaluated using optical microscopy and X-ray diffraction (XRD) analysis and also Vickers microhardness was measured. Hemispherical samples and disks were used for 2-body wear tests, performed by repeated grinding of the samples. Wear resistance was assessed as height loss after 40,000 cycles. The data were compared using ANOVA and post-hoc Tukey test. Ti-5Zr presented a Widmanstatten structure and the identified phases were alpha and alpha' while Ti-5Ta and Ti-5Ta-5Zr presented alpha, beta, alpha' and alpha '' phases, but the former presented a lamellar structure, and the other, acicular. The microhardness of Ti-5Zr was significantly greater than other materials and cp Ti presented wear resistance significantly lower than experimental alloys. It was concluded that wear resistance was improved when adding Ta and Zr to titanium and Zr increased microhardness of Ti-5Zr alloy. (C) 2011 Elsevier Ltd. All rights reserved.
Data de publicação: 
1-Nov-2011
Citação: 
Journal of The Mechanical Behavior of Biomedical Materials. Amsterdam: Elsevier B.V., v. 4, n. 8, p. 1873-1879, 2011.
Duração: 
1873-1879
Publicador: 
Elsevier B.V.
Palavras-chaves: 
  • Sliding wear
  • Titanium alloys
  • Dental applications
  • Two-body abrasion
  • Wear testing
  • Hardness tests
Fonte: 
http://dx.doi.org/10.1016/j.jmbbm.2011.06.004
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/9433
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