Al2O3-Ti functionally graded material prepared by spark plasma sintering for orthopaedic applications

Bahraminasab, Marjan; Ghaffari, Somaye; Eslami-shahed, Hossein

doi:10.1016/j.jmbbm.2017.04.024

Cited by 60 publications

(40 citation statements)

References 28 publications

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“…[31,[33][34][35][36]. For example, many studies proved that Ti could significantly improve the mechanical properties of Al 2 O 3 [37]. Moreover, Guzman et al [38] fabricated Al 2 O 3 -Ti biocermets and the results demonstrated that appropriate amounts of Ti in the biocermets contributed to the improvement in roughness and wettability, which thereby enhanced the cytocompatibility and protein adsorption of Al 2 O 3 .…”

Section: Ceramic-based Biocermetsmentioning

confidence: 99%

Advances in biocermets for bone implant applications

et al. 2020

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As two promising biomaterials for bone implants, biomedical metals have favorable mechanical properties and good machinability but lack of bioactivity; while bioceramics are known for good biocompatibility or even bioactivity but limited by their high brittleness. Biocermets, a kind of composites composing of bioceramics and biomedical metals, have been developed as an effective solution by combining their complementary advantages. This paper focused on the recently studied biocermets for bone implant applications. Concretely, biocermets were divided into ceramic-based biocermets and metal-based biocermets according to the phase percentages. Their characteristics were systematically summarized, and the fabrication methods for biocermets were reviewed and compared. Emphases were put on the interactions between bioceramics and biomedical metals, as well as the performance improvement mechanisms. More importantly, the main methods for the interfacial reinforcing were summarized, and the corresponding interfacial reinforcing mechanisms were discussed. In addition, the in vitro and in vivo biological performances of biocermets were also reviewed. Finally, future research directions were proposed on the advancement in component design, interfacial reinforcing and forming mechanisms for the fabrication of high-performance biocermets.

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Section: Ceramic-based Biocermetsmentioning

confidence: 99%

Advances in biocermets for bone implant applications

et al. 2020

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“…Al 2 O 3 -Ti biocomposites were fabricated by spark plasma sintering (SPS), in the last decade, and their mechanical and corrosion characteristics were evaluated which showed promising results [15][16][17][18][19][20]. Superior flaw tolerance and toughness were obtained for 25 vol.% Ti rather than pure Al 2 O 3 [16].…”

Section: Introductionmentioning

confidence: 99%

“…They found higher elastic modulus, bending strength, and hardness of the composites made by TiH 2 , but lower fracture toughness compared with using pure Ti. Moreover, Bahraminasab et al [15] fabricated a five-layer functionally graded material and uniform composites of Al 2 O 3 -Ti with 25-75 vol.% Ti, and found good mechanical properties including high hardness.…”

Section: Introductionmentioning

confidence: 99%

In vivo performance of Al2O3-Ti bone implants in the rat femur

et al. 2021

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Background Alumina-titanium (Al2O3-Ti) biocomposites have been recently developed with improved mechanical properties for use in heavily loaded orthopedic sites. Their biological performance, however, has not been investigated yet. Methods The aim of the present study was to evaluate the in vivo biological interaction of Al2O3-Ti. Spark plasma sintering (SPS) was used to fabricate Al2O3-Ti composites with 25 vol.%, 50 vol.%, and 75 vol.% Ti content. Pure alumina and titanium were also fabricated by the same procedure for comparison. The fabricated composite disks were cut into small bars and implanted into medullary canals of rat femurs. The histological analysis and scanning electron microscopy (SEM) observation were carried out to determine the bone formation ability of these materials and to evaluate the bone-implant interfaces. Results The histological observation showed the formation of osteoblast, osteocytes with lacuna, bone with lamellar structures, and blood vessels indicating that the healing and remodeling of the bone, and vasculature reconstruction occurred after 4 and 8 weeks of implantation. However, superior bone formation and maturation were obtained after 8 weeks. SEM images also showed stronger interfaces at week 8. There were differences between the composites in percentages of bone area (TB%) and the number of osteocytes. The 50Ti composite showed higher TB% at week 4, while 25Ti and 75Ti represented higher TB% at week 8. All the composites showed a higher number of osteocytes compared to 100Ti, particularly 75Ti. Conclusions The fabricated composites have the potential to be used in load-bearing orthopedic applications.

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“…It was shown through bending tests that fracture occurs within a reaction layer formed at the interface. Hardness and bending strength of the alumina-titanium composites were compared to those of FGM samples (Bahraminasab M et al 2017). The reactivity of titatium with alumina and the presence of micro-cracks for SPS sintered Al 2 O 3 /Ti functionally graded materials was also reported by Madec C. et al 2018.…”

Section: B) Comparison With Conventional Commercial Ceramics and Scrementioning

confidence: 68%

One step densification of printed multilayers by SPS: Towards new piezoelectric energy harvester MEMS

Debéda

Rua-Taborda

Chung

et al. 2019

Spark Plasma Sintering

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Autonomous electronic devices and increasing use of wireless sensors, which are more and more performant, are facing the problem of energy autonomy. This autonomy can be managed either with a preliminary storage and/or energy harvesting. Hence, since 20 years, the energy harvesting research field is intensive focusing on the development of new materials and their integration in micro/nanogenerators. In this research area, Micro-Electromechanical System (MEMS) energy harvesters (EH) using piezoelectric materials is one of the most promising option because of the availability of mechanical vibrations and of the simply electromechanical conversion. Piezoelectric ceramics, commonly used in various applications, are attractive for EH, and among them, Pb(Zr 1x Ti x)O 3 (PZT), despite its lead content, remains mostly studied because of its outstanding properties. For its ceramic process, the main objectives are improved densification, a cost and energy effective processing and integration in microgenerators. In this context, SPS sintering of electroded printed PZT piezoelectric layers supported on stainless steel substrate (SS) is highly challenging. In this chapter, after a section devoted to piezoelectric EH, the device made of screen-printed PZT layers on SS substrate is presented. Then, the authors focus on the strategy to achieve in one step a cantilever transducer where the electroded printed PZT and the SS substrate are co-sintered by SPS. As a first part of this ambitious objective, microstructural, dielectric and piezoelectric properties of the PZT pellet densified by SPS are presented and compared to PZT printed layers conventionally sintered.

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Al2O3-Ti functionally graded material prepared by spark plasma sintering for orthopaedic applications

Cited by 60 publications

References 28 publications

Advances in biocermets for bone implant applications

Advances in biocermets for bone implant applications

In vivo performance of Al2O3-Ti bone implants in the rat femur

One step densification of printed multilayers by SPS: Towards new piezoelectric energy harvester MEMS

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