Hardness response to the stability of a Ti(+N) solid solution in an annealed TiN/Ti(+N)/Ti mixture layer formed by nitrogen ion implantation into titanium

Vlcak, Petr; Drahokoupil, Jan; Veřtát, Petr; Šepitka, Josef; Duchoň, Jan

doi:10.1016/j.jallcom.2018.02.301

Cited by 18 publications

(16 citation statements)

References 36 publications

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“…30 The trend of measured data slowly going toward to the bulk cpTi (substrate) mechanical properties; reduced elastic modulus E r $ 98-107 GPa and indentation hardness H IT $ 3-5 GPa. 31,32 Based on the rule 1/10 and length of nanotubes in the…”

Section: Resultsmentioning

confidence: 99%

Different diameters of titanium dioxide nanotubes modulate Saos-2 osteoblast-like cell adhesion and osteogenic differentiation and nanomechanical properties of the surface

et al. 2019

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Section: Resultsmentioning

confidence: 99%

Different diameters of titanium dioxide nanotubes modulate Saos-2 osteoblast-like cell adhesion and osteogenic differentiation and nanomechanical properties of the surface

et al. 2019

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“…The CP–Ti elongation is 31.8%, whereas Ti(N)–TiBw composites with 0.5 wt.% h‐BN additives are maintained at 27.7%, and the elongation only drops by 12%, which suggests that the solid solution of N atoms improves the thermal stability of the Ti(N)−TiBw composites markedly, which is consistent with the literature. [ 22 ]…”

Section: Resultsmentioning

confidence: 99%

TiB Whisker and Nitrogen Solid‐Solution Synergistic‐Strengthened Titanium Matrix Composites by Ti–BN via Spark Plasma Sintering and Hot Extrusion

Pan

Gao

et al. 2021

Adv Eng Mater

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TiB whisker (TiBw) and nitrogen (N) solid‐solution synergistic‐strengthened titanium matrix composites (TMCs) are prepared by in situ reaction of Ti–BN system via spark plasma sintering (SPS) and hot extrusion. The effects of the in situ‐synthesized TiBw and N solid solution on the microstructure and mechanical properties of TMCs are studied. Results show that TiBw is broken into several short fragments and distributed parallel to the extrusion direction after hot extrusion, whereas N atoms are all dissolved into the Ti matrix. The BN additive dispersion method and hot extrusion process can greatly eliminate TiBw aggregates and reduce the mean size of TiBw. Tensile test results reveal that the Ti with only 0.4 wt.% BN exhibits an exceptional ultimate tensile strength of 879 MPa and 16.6% elongation at room temperature. On this basis, the main strengthening mechanism of TiBw reinforcement and N solid solution at room and high temperature are studied based on the Hall–Petch equation, load transfer mechanism, and Labusch model.

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“…However, due to a relatively high elastic modulus of this alloy (more than 100 GPa) in comparison with the native bone tissue (about 30 GPa in cortical bone), a stress-shielding effect appears, and this can cause bone resorption and loosening of the implant [6]. This problem can be mitigated by the use of alloys based on Ti with β-structure, i.e., a crystallographic phase with a body-centered cubic (BCC) lattice, which has a principally lower elastic modulus than the α− or α + β structure that is usually present in currently used titanium-based implants [7,8]. These materials include in particular a new titanium-niobium (TiNb) alloy (a binary system with a β-structure, i.e., β-TiNb), and a number of other Ti-Nb, titaniumniobium-tantalum (Ti-Nb-Ta) and titanium-zirconium-niobium (Ti-Zr-Nb) alloys.…”

Section: Introductionmentioning

confidence: 99%

Beta-Titanium Alloy Covered by Ferroelectric Coating–Physicochemical Properties and Human Osteoblast-Like Cell Response

et al. 2021

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Beta-titanium alloys are promising materials for bone implants due to their advantageous mechanical properties. For enhancing the interaction of bone cells with this perspective material, we developed a ferroelectric barium titanate (BaTiO3) coating on a Ti39Nb alloy by hydrothermal synthesis. This coating was analyzed by scanning electron and Raman microscopy, X-ray diffraction, piezoresponse force microscopy, X-ray photoelectron spectroscopy, nanoindentation, and roughness measurement. Leaching experiments in a saline solution revealed that Ba is released from the coating. A progressive decrease of Ba concentration in the material was also found after 1, 3, and 7 days of cultivation of human osteoblast-like Saos-2 cells. On day 1, the Saos-2 cells adhered on the BaTiO3 film in higher initial numbers than on the bare alloy, but they were less spread, and their initial proliferation rate was slower. These cells also contained a lower amount of beta1-integrins and vinculin, i.e., molecules involved in cell adhesion, and produced a lower amount of collagen I. This cell behavior was attributed to a higher surface roughness of BaTiO3 film rather than to its potential cytotoxicity, because the cell viability on this film was very high, reaching almost 99%. The amount of alkaline phosphatase, an enzyme involved in bone matrix mineralization, was similar in cells on the BaTiO3-coated and uncoated alloy, and on day 7, the cells on BaTiO3 film attained a higher final cell population density. These results indicate that after some improvements, particularly in its roughness and stability, the hydrothermal ferroelectric BaTiO3 film could be promising coating for improved osseointegration of bone implants.

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Hardness response to the stability of a Ti(+N) solid solution in an annealed TiN/Ti(+N)/Ti mixture layer formed by nitrogen ion implantation into titanium

Cited by 18 publications

References 36 publications

Different diameters of titanium dioxide nanotubes modulate Saos-2 osteoblast-like cell adhesion and osteogenic differentiation and nanomechanical properties of the surface

Different diameters of titanium dioxide nanotubes modulate Saos-2 osteoblast-like cell adhesion and osteogenic differentiation and nanomechanical properties of the surface

TiB Whisker and Nitrogen Solid‐Solution Synergistic‐Strengthened Titanium Matrix Composites by Ti–BN via Spark Plasma Sintering and Hot Extrusion

Beta-Titanium Alloy Covered by Ferroelectric Coating–Physicochemical Properties and Human Osteoblast-Like Cell Response

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