Preparation and characterization of titanium-zirconium alloys
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2023
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LATIN-AMERICAN CONGRESS OF ARTIFICIAL ORGANS AND BIOMATERIALS, 12th
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Resumo
Introduction and objective
The alloys used for making dental implants must display properties such as biocompatibility, biofunctionality
and corrosion resistance. The titanium alloys are the most widely used due to their higher strength-to-density
ratio, superior biocompatibility and corrosion resistance, good mechanical properties, low tensile modulus
when compared to other metallic biomaterials. The main objective of this work was the preparation of
titanium-zirconium alloys for implant dentistry. The work aimed to compare the results of melting during the
various stages of furnace preparation and the corresponding mechanical and microstructural
characterization of the obtained titanium-zirconium alloys.
Methodology
A casting of two implant candidate alloys was carried out (Ti14%Zr and Ti20%Zr by mass). The used vacuum
melting furnace, an electric arc furnace fitted with tungsten non consumable electrode and billets with 200
g mass were cast. The experimental alloys were chemically characterized using a scanning electron
microscope fitted with an energy dispersive spectrometer. The gas analysis was carried out. The
microstructure was characterized using optical and scanning electron microscopy. The mechanical properties
were assessed using instrumented microhardness testing.
Results and discussion
The resulting melting microstructure observed using optical microscopy, a microstructure in the form of slats
or lamellae, also described as basket-weave, can be easily discerned. All microstructures showed the coarse
melting microstructures with Widmanstätten lamellae that were related to the inherent anisotropy of the
hexagonal crystalline structure of the α phase. With increasing Zr content in Ti-Zr alloy, Widmanstätten
lamellar structures became coarser.
Titanium reacts easily with other elements, mainly gases, such as hydrogen, nitrogen and oxygen, dissolving
quickly in liquid or solid metal at temperatures above 400 °C, resulting in samples with less ductility or more
brittle. The as casted laboratory samples with the addition of 14% zirconium and 20% titanium resulted in
increased hardness as compared to commercial sample.
Conclusion
The prepared alloys showed a low carbon contamination, less than 0.03% by mass, indicating that clean melts
can be obtained in the electric arc furnace with non-consumable electrode. Samples fused in the laboratory
with the addition of 12% and 20% zirconium to titanium caused an increase in microhardness when
compared to the commercial sample, which also has about 12% Zr.
Como referenciar
COSTA, GUILHERME R.; LEITE, DANIELA M.C.; MUSCI, CRISTIANO S.; ROSSI, JESUALDO L. Preparation and characterization of titanium-zirconium alloys. In: LATIN-AMERICAN CONGRESS OF ARTIFICIAL ORGANS AND BIOMATERIALS, 12th, December 12-15, 2023, Mar del Plata, Argentina. Abstract... p. 83-83. Disponível em: https://repositorio.ipen.br/handle/123456789/47944. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.