Sintering and mechanical properties of the alumina–tricalcium phosphate–titania composites

Sakka, Siwar; Bouaziz, Jamel; Ayed, Foued Ben

doi:10.1016/j.msec.2014.03.036

Cited by 27 publications

(31 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, the best mechanical properties of this study reached 13.5 MPa with a composition of the alumina-10 wt% tricalcium phosphate composite after the sintering at 1600°C [11]. Thereby, the next study directed by Sakka et al proved that the incorporation of 5 wt% TiO 2 to the alumina-10 wt% tricalcium phosphate composite matrix leads to the highest mechanical performances (74 MPa) at 1600°C [12]. However, the very low content of tricalcium phosphate (10 wt%) in the composites based on alumina, titania and tricalcium phosphate limits its use in the biomedical applications.…”

Section: Introductionmentioning

confidence: 47%

“…Moreover, the mechanical properties of tricalcium phosphate are generally inadequate for many load-carrying applications [3,6,9]. Hence, inert oxides such as alumina (Al 2 O 3 ) or zirconia (ZrO 2 ) have been widely studied due to their bio-inertness, excellent tribological properties, fracture toughness and strength [6,9,[11][12][13][14][15]. Thus, the study conducted by Sakka et al has recently concerned with the tricalcium phosphate/alumina system [11].…”

Section: Introductionmentioning

confidence: 99%

“…However, the very low content of tricalcium phosphate (10 wt%) in the composites based on alumina, titania and tricalcium phosphate limits its use in the biomedical applications. Furthermore, the presence of the sizeable grains hinders the performances of these composites caused by the high temperature sintering [12]. Also, the study made by Sallemi et al was interested to elaborate and to characterize the tricalcium phosphatezirconia composites with different percentages of zirconia (25,50 and 75 wt%) [14].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the expansion in volume of the zirconia samples is responsible for the fragility of the tricalcium phosphate-zirconia composites [13,14]. In conclusion, the addition of alumina or zirconia to the TCP matrix did not enhance the mechanical properties [11][12][13][14]. For this reason, we tested another inert oxide like titania (TiO 2 ).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sintering of the Tricalcium Phosphate-Titania-Magnesium Fluoride Composites

Ayadi¹,

Ayed²

2018

Sintering of Functional Materials

View full text Add to dashboard Cite

Titania (TiO 2 ) and magnesium fluoride (MgF 2 ) can be mixed with tricalcium phosphate (β-Ca 3 (PO 4 ) 2 , β-TCP) to make bioceramic composites, which would combine the biocompatibility of the β-TCP and the high tribological properties of TiO 2 and MgF 2 for biomedical applications. The samples were characterized by different characterization techniques such as physicochemical and mechanical. The sintering of the TCP at various temperatures (1000, 1100, 1200 and 1300°C) with different percentages of titania (2.5, 5, 7.5, 10, 20, 30, 40 and 50 wt%) was studied. The performances of the TCP-TiO 2 composites increase with both the sintering temperature and the amount of titania. The highest values of the composites' (H = 270 Hv; E = 33.1 GPa and G = 15.7 GPa) were obtained with 40 wt% titania at 1200°C. Moreover, the addition of 4 wt% MgF 2 to the TCP-40 wt% TiO 2 composites leads to better mechanical properties (σ r = 27 MPa; H = 360 Hv; E = 51 GPa and G = 20 GPa) at 1200°C for 1 h. The amelioration of these properties is due to the formation of a new compound and the liquid phase which helps to fill the pores in the microstructure. The obtained performances of the TCP-TiO 2 -MgF 2 composites are similar to those of bone tissue and especially as enamel.

show abstract

Section: Introductionmentioning

confidence: 47%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sintering of the Tricalcium Phosphate-Titania-Magnesium Fluoride Composites

Ayadi¹,

Ayed²

2018

Sintering of Functional Materials

View full text Add to dashboard Cite

show abstract

“…In this context, HA largely decomposes into tricalcium phosphate, and although in many cases the presence of zirconia improves the mechanical resistance of the final composite, secondary phases depressed the bioactivity and bioresorbability of the scaffolds. In various cases, the formation of secondary phases also resulted into volume modifications in the ceramic body, thus possibly inducing microcracks in the final scaffold after the sintering treatments [31,32].…”

Section: Application Of Titanium Dioxidementioning

confidence: 99%

Composite Calcium Phosphate/Titania Scaffolds in Bone Tissue Engineering

Dapporto¹,

Tampieri²,

Sprio³

2017

Application of Titanium Dioxide

View full text Add to dashboard Cite

Titanium and its alloys have been extensively used as implantation materials due to their favorable properties such as lower modulus, good tensile strength, excellent biocompatibility, and enhanced corrosion resistance. However, their intrinsic bioinertness generally prevents a direct bond with the bone on the surface especially at an early stage of implantation. In recent years, bioactive scaffolds for bone regeneration are progressively replacing bioinert prostheses in orthopedic, maxillofacial, and neurosurgery fields. Given the need of enhanced mechanical strength, several combinations of bioactive and reinforcing phases have been studied, but still no convincing solutions have been found so far. In this context, titanium oxides are light and high-resistance bioactive materials widely employed in dental and bone application due to their capacity of forming strong bonds with bone tissue via the formation of a tightly bound apatite layer on their surface. The addition of titania particles to hydroxyapatite has attracted considerable attention based on the assumption that resulting materials can enhance osteoblast adhesion and promote cell growth while also providing high strength and fracture toughness in the final composite material, thus being adequate for load-bearing applications.

show abstract