Effect of NbH Particle size and cooling type on the microstructure, phase composition and microhardness of Ti-20Nb-20Zr alloy
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Resumo
Titanium alloys are widely used as implants in orthopedics and dentistry due to their
properties such as high strength, corrosion resistance, biocompatibility and good fatigue resistance.
Alloys composed of non-toxic elements, like Nb and Zr, provide lowest Young’s modulus with
values near to human bone modulus. The goal of this work was to study the effect of NbH particle
size and cooling type on the microstructure, phase composition and microhardness of Ti-20Nb-20Zr
alloy. The powders were produced by hydrogenation method. Two different powders of NbH were
prepared: powders comminuted (C) and comminuted followed by milling (C+M). After, the alloy
powders were milling and homogenizated for 6 h / 300 rpm and sintered at 1300 °C / 3h followed
furnace cooling. Afterward, the specimens were treated at 1000 °C / 1 h and cooling in air and
water. The samples were characterized by XRD, SEM and Vickers microhardness. The results
showed that the alloy is classified as α + β. Vickers microhardness of Ti-20Nb-20Zr ranged
between 680-700 and 540-600 HV from alloys prepared with NbH-comminuted and NbH
comminuted + milled, respectively. Results indicated that NbH agglomerate behave as barriers for
the sintering process of the alloy.
Como referenciar
MENDES, MARCIO W.D.; MENDES, NARAYANNA M.F.; BRESSIANI, ANA H. de A.; BRESSIANI, JOSE C. Effect of NbH Particle size and cooling type on the microstructure, phase composition and microhardness of Ti-20Nb-20Zr alloy. Materials Science Forum, v. 899, p. 243-247, 2017. DOI: 10.4028/www.scientific.net/MSF.899.243. Disponível em: http://repositorio.ipen.br/handle/123456789/29077. 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.