Nanoindentation study of Ti6Al4V alloy nitrided by low intensity plasma jet process

Barbieri, F.; Otani, C.; Lepienski, C.M.; Urruchi, Wilfredo Irrazabal; Maciel, Homero Santiago; Filho, Gilberto Petraconi

doi:10.1016/s0042-207x(02)00231-2

Cited by 26 publications

(18 citation statements)

References 7 publications

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“…The hardness and the Young's modulus values are comparable with those reported in the literature (hardness 1.6–2.6 GPa, Young's modulus 90–120 GPa) [15,54,55]. Note that the Ti–6Al–4V substrate alone was reported to have a hardness of 4–5 GPa and a Young's modulus of 110–140 GPa [54,56] and bone was reported to have a hardness of 0.3–0.8 GPa and a Young's modulus of 14–27 GPa [57–59]. Compared with the increase in hardness ratio of 45%, Young's modulus increased by only 12% with increasing laser fluence from 5 to 7 J cm −2 .…”

Section: Resultssupporting

confidence: 82%

In vitro dissolution and mechanical behavior of c-axis preferentially oriented hydroxyapatite thin films fabricated by pulsed laser deposition

et al. 2010

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Owing to its resemblance to the major inorganic constituent of bone and tooth, hydroxyapatite is recognized as one of the most biocompatible materials and is widely used in systems for bone replacement and regeneration. In this study the pulsed laser deposition technique was chosen to produce hydroxyapatite with different crystallographic orientations in order to investigate some of the material properties, including its in vitro dissolution behavior, as well as mechanical properties. The crystallographic orientations of hydroxyapatite coatings can be carefully controlled, mainly by varying the energy density of the KrF excimer laser (248 nm) used for deposition. Nanoindentation results showed that highly c-axis oriented hydroxyapatite coatings have higher hardness and Young's modulus values compared with the values of randomly oriented coatings. After 24 h immersion in simulated physiological solution the overall surface morphology of the highly oriented coatings was dramatically altered. The porosity was drastically increased and sub-micron pores were formed throughout the coatings, whereas the average size of the grains in the coatings was not significantly changed. The composition of the textured hydroxyapatite coatings remained essentially unchanged. Their c-axis texture, on the other hand, was rather enhanced with an increase in immersion time. The c-axis oriented hydroxyapatite surfaces are likely to promote preferentially oriented growth through a cyclic process of dissolution and reprecipitation, followed by homoepitaxial growth. The remarkable morphological and microstructural changes after dissolution suggest a capability of highly textured hydroxyapatite as a tissue engineering scaffold with an interconnecting porous network that may be beneficial for cellular activity.

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Section: Resultssupporting

confidence: 82%

In vitro dissolution and mechanical behavior of c-axis preferentially oriented hydroxyapatite thin films fabricated by pulsed laser deposition

et al. 2010

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“…For comparison, the mechanical properties of the Ti6Al4V www.intechopen.com Novel Titanium Manganese Alloys and Their Macroporous Foams for Biomedical Applications Prepared by Field Assisted Sintering 209 alloy were also measured with the same methods. This shows a hardness of 4.3 GPa ± 0.3 GPa, an elastic modulus of 122 GPa ± 4.0 GPa, and a ductility of 14.0 GPa ± 1.5 GPa which are almost identical with reported literature values (Barbieri et al, 2007). The Ti2Mn, Ti5Mn and Ti8Mn alloys possess lower elastic modulus and higher ductility than the Ti6Al4V alloy.…”

Section: Properties Of the Timn Alloyssupporting

confidence: 87%

Novel Titanium Manganese Alloys and Their Macroporous Foams for Biomedical Applications Prepared by Field Assisted Sintering

Zhang¹,

Burkel²

2011

Biomedical Engineering, Trends in Materials Science

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“…There are few micropores on the fracture surface of the TiMn alloys. The grain size of the Ti8Mn alloys is about 500 nm in ultrafine microstructure and the fracture mode of the alloy is primary intergranular cracking [ Figure 7 21 The Ti2Mn, Ti5Mn, and Ti8Mn alloy possess lower elastic modulus and higher ductility than those of the Ti6Al4V alloy. Figure 9 represent the cytotoxicity and cell proliferation properties of the TiMn alloys.…”

Section: Resultsmentioning

confidence: 99%

Preparation, microstructures, mechanical properties, and cytocompatibility of TiMn alloys for biomedical applications

et al. 2010

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The titanium-manganese (TiMn) alloys have been extensively used in aerospace and hydrogen storage. In this study, the TiMn alloys with various manganese contents ranging from 2 to 12 wt % were prepared by using mechanical alloying and spark plasma sintering (SPS) techniques. The microstructures, mechanical properties including hardness, elastic modulus and ductility, cytotoxicity and cell proliferation properties of the TiMn alloys were investigated to explore their biomedical applications. The addition of manganese to the titanium reduced the alpha to beta transformation temperature and was confirmed as a beta stabilizer element. The manganese increased the relative density of the alloy and thus high density TiMn alloys with alpha+beta structure were prepared by using SPS at 700 degrees C. The hardness increased significantly ranging from 2.4 GPa (Ti2Mn) to 5.28 GPa (Ti12Mn) and the elastic modulus ranging from 83.3 GPa (Ti2Mn) to 122 GPa (Ti12Mn), the ductility decreased ranging from 21.3% (Ti2Mn) to 11.7% (Ti12Mn) with increasing manganese content in the Ti. Concentrations of Mn below 8 wt % in titanium reveal negligible effects on the metabolic activity and the cell proliferation of human osteoblasts. The Mn could be used in lower concentrations as an alloying element for biomedical titanium. The Ti2Mn, Ti5Mn, and Ti8Mn alloys with supervisor mechanical properties and acceptable cytocompatibility have a potential for use as bone substitutes and dental implants.

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Nanoindentation study of Ti6Al4V alloy nitrided by low intensity plasma jet process

Cited by 26 publications

References 7 publications

In vitro dissolution and mechanical behavior of c-axis preferentially oriented hydroxyapatite thin films fabricated by pulsed laser deposition

In vitro dissolution and mechanical behavior of c-axis preferentially oriented hydroxyapatite thin films fabricated by pulsed laser deposition

Novel Titanium Manganese Alloys and Their Macroporous Foams for Biomedical Applications Prepared by Field Assisted Sintering

Preparation, microstructures, mechanical properties, and cytocompatibility of TiMn alloys for biomedical applications

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