Microstructural study of a titanium-based biocomposite produced by the powder metallurgy process with TiH2 and nanometric β-TCP powders

Gemelli, Enori; Jesus, Jailson de; Camargo, Nelson Heriberto Almeida; Soares, Glória Dulce de Almeida; Henriques, Vinícius André Rodrigues; Nery, Fábio

doi:10.1016/j.msec.2012.02.017

Cited by 15 publications

(7 citation statements)

References 21 publications

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“…Moreover, the presence of secondary phase in the powder milled for 2 h did not change the crystal structure of the initial HA ceramic matrix composition. Only a slight change on the surface of HA nanoparticles was found, which was attributed to the dispersion achieved by milling, as has been reported by other authors who used the same method to prepare powder mixtures [9,10,36]. Figure 4 shows the XRD diffractograms of the nanocomposite powders obtained by heat treatment at 1100ºC/2h, indicating a decrease in peak intensity in the HA phase, an increase in peak intensity in the β-TCP phase, and the presence of low intensity peaks in the CaTiO 3 phase of the orthorhombic crystal system.…”

Section: Resultssupporting

confidence: 76%

“…All these authors found that the nanometric secondary phase in an inter-intragranular position in HA ceramic matrices can affect the thermal stability of the HA phase at high temperatures, leading to the formation of β-TCP phase and α phase at lower temperatures [2, 4-5, 9-11, 13, 34]. The presence of CaTiO 3 phase in the orthorhombic structure of biomaterial compositions has been described in the literature, i.e., a HA ceramic matrix in the presence of a TiO 2 -type nanometric secondary phase at high temperatures causes the Ca ions in the HA phase to dissociate, allowing for the formation of crystal phase CaTiO 3 [ 13,[36][37].…”

Section: Resultsmentioning

confidence: 99%

“…The HA employed for the preparation of nanocomposite powders, which was supplied by the Biomaterials Group of UDESC -Santa Catarina State University (Brazil), was obtained by the wet chemical method, as described in [4]. The low intensity peaks observed by an X-ray technique represent the β-TCP phase in the HA composition, which is related to the method of synthesis, as observed by other authors who used other methods of synthesis to produce the hydroxyapatite phase [4,9,[35][36]. The nanocomposite powders were obtained by mixing the phases in a high energy attrition mill using distilled water and zirconia spheres.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Hydroxyapatite/TiO<SUB>2</SUB>n Nanocomposites for Bone Tissue Regeneration

Camargo¹,

Lima²

2012

AJBE

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The development of nanostructured powders and materials is an innovative alternative that promises to replace many conventional autogenous, halogenous and exogenous biomaterials in the near future. Nanostructured biomaterials stand out as a highly current research topic and appear auspicious for biomedical applications, implant fixation and bone tissue reconstruction because their features differ from conventional biomaterials in terms of wettability, granule, grains surface area, and microporosity, which are favorable for new bone formation. The hydroxyapatite used as bone matrix in this study was produced by the Biomaterials Group of the Santa Catarina State University -UDESC (Brazil). The hydroxyapatite (HA) powder was obtained from synthesis by the dissolution-precipitation reaction of solid/liquid phase of CaO and phosphoric acid to form a composition with a Ca/P molar ratio of 1.67. The powder resulting from the synthesis was calcined at 900ºC/2h, generating the HA phase with a low content of tricalcium phosphate β-TCP (whitlockite). The aim of this study was to prepare and characterize four HA/TiO 2 n nanocomposite powder compositions in the form of microporous granules in concentrations of 1, 2, 3 and 5 vol.% of TiO 2 n. The phase morphology, powder and granule surface area, and bonding bands in different powder and granule compositions were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and gas absorption (BET).

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Hydroxyapatite/TiO<SUB>2</SUB>n Nanocomposites for Bone Tissue Regeneration

Camargo¹,

Lima²

2012

AJBE

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“…Titanium-based metal matrix composites represent a new generation of biomaterials with superior properties and cost-effective production methods compared to conventional metallurgical methods. A great effort to develop this kind of material through different manufacturing processes in order to optimize their structure, mechanical properties and surface treatment could be found in many studies [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. In addition to all the research, there are many questions regarding the optimal surface morphology that have not yet been answered.…”

Section: Introductionmentioning

confidence: 99%

Surface treatment of Ti and Ti composites using concentrating solar power and laser

Kováčik

Emmer²,

Rodríguez³

et al. 2023

European Mechanical Science

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Titanium and its composites are widely used in implants of bones and teeth. Besides mechanical properties also surface characteristics are very important in these biomaterials. Very important are properties such as surface topography, roughness, chemistry, and surface energy, wettability, and Ti oxides or Ti nitride layers thickness. The concentrated solar power was used successfully to nitride Ti Grade 2 and powder metallurgical Ti prepared from hydrogenated dehydrogenated Ti powder. The nitriding experiments were performed under nitrogen atmosphere at different temperatures and time in SF40 (40kW horizontal solar furnace) at PSA, Spain. Concentrated solar energy has been shown to be an economical alternative to conventional gas nitriding techniques in electric furnaces, CVD, PVD, plasma nitriding, or laser treatments. It has been observed that the solar process represents a significant reduction of the heating time to several minutes (up to 5 minutes at temperature range 500-1000 °C), a clean and non-polluting high-temperature process. The formation of continuous and homogeneous surface layers of TiN, Ti2N and their mixture according to the nitriding temperature was investigated using X-ray diffraction and electron microscopy. Laser surface treatment is of great significance in modifying surface morphology and surface and near-surface region microstructures. Effects of lase treatment parameters on machined surface morphology, surface roughness and chemistry are analyzed in this study and discussed from the point of view of application in dental implantology. The current advances of our research group in application of laser-treated powder metallurgy prepared Ti-based materials are analyzed and discussed.

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“…Others highlighted the materials which are used in dental applications by finding alternative materials with better properties. They tried to discover many materials as alternative biomaterials by combining metals and ceramic materials [17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Ti/HA in Saliva at Different Temperatures as Restorative Materials

Anaee

2016

J Bio Tribo Corros

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Titanium and hydroxyapatite (HA) are wellknown materials applied as biomaterials. Ti shows good mechanical properties and corrosion resistance, whereas HA possesses excellent biocompatibility and bioactivity but weak mechanical properties. The combination of the Ti and HA properties is expected to produce good corrosion resistance. Corrosion behavior of Ti/HA as composite (70Ti/30HA) and functionally graded material (Ti/HA FGM with five layers) has been investigated in saliva at pH 4.4 at five temperatures 10, 20, 30, 40, and 50°C to use it as restorative material. There is reason for concern about the weak ceramic/metal bond and the integrity of this interface over a long-term performance under functional loading, therefore Ti/HA as FGM was fabricated to get good cohesive force between metal (Ti) and ceramic (HA) through the graduated layers. The corrosion results of Ti/ HA materials were compared with that of pure Ti. The X-ray diffraction patterns and SEM of the composite showed that the HA decomposed and formed secondary phases which have biocompatibility in human body. These phases are mainly Ca 5 (PO 4) 3 (OH), Ti 4 P 3 , CaO, Ca 4-O(PO 4) 2 , and b-TCP. The results showed that the corrosion rate of Ti/HA as composite and FGM was lower than that for pure Ti due to the role of HA which forms phases that reduce the reactivity of titanium to dissolve in saliva over experimental temperatures. Also, the data of polarization resistance for Ti/HA materials were higher than that for pure Ti in saliva. Biocompatibility test showed that Ti/HA materials gave good absorption to culture cells, and functionally graded material had better absorbance than composite.

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Microstructural study of a titanium-based biocomposite produced by the powder metallurgy process with TiH2 and nanometric β-TCP powders

Cited by 15 publications

References 21 publications

Synthesis and Characterization of Hydroxyapatite/TiO<SUB>2</SUB>n Nanocomposites for Bone Tissue Regeneration

Synthesis and Characterization of Hydroxyapatite/TiO<SUB>2</SUB>n Nanocomposites for Bone Tissue Regeneration

Surface treatment of Ti and Ti composites using concentrating solar power and laser

Behavior of Ti/HA in Saliva at Different Temperatures as Restorative Materials

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