Recent research and development in titanium alloys for biomedical applications and healthcare goods

Niinomi, Mitsuo

doi:10.1016/j.stam.2003.09.002

Cited by 848 publications

(437 citation statements)

References 31 publications

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“…The published experimental data are collected from various sources [1,[41][42][43][44][45][46][47][48][49][50]. The input variables consist of compositional variables and processing parameters and the output variable are the mechanical properties.…”

Section: Databasementioning

confidence: 99%

Imprecise knowledge based design and development of titanium alloys for prosthetic applications

Datta

Mahfouf

Zhang

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

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Sultana, N. (2015) Imprecise knowledge based design and development of titanium alloys for prosthetic applications.Journal Abstract Imprecise knowledge on the composition-processing-microstructure-property correlation of titanium alloys combined with experimental data are used for developing rule based models for predicting the strength and elastic modulus of titanium alloys. The developed models are used for designing alloys suitable for orthopaedic and dental applications. Reduced Space Searching Algorithm is employed for the multi-objective optimization to find composition, processing and microstructure of titanium alloys suitable for orthopaedic applications. The conflicting requirements attributes of the alloys for this particular purpose are high strength with low elastic modulus, along with adequate biocompatibility and low costs. The 'Pareto' solutions developed through multi-objective optimization show that the preferred compositions for the fulfilling the above objectives lead to β or near β alloys. The concept of decision making employed on the solutions leads to some compositions, which should provide better combination of the required attributes. The experimental development of some of the alloys has been carried out as guided by the model-based design methodology ©2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ 2 presented in this research. Primary characterizations of the alloys show encouraging results in terms of the mechanical properties.

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Section: Databasementioning

confidence: 99%

Imprecise knowledge based design and development of titanium alloys for prosthetic applications

Datta

Mahfouf

Zhang

et al. 2016

Journal of the Mechanical Behavior of Biomedical Materials

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“…Entre os materiais metálicos convencionais para tal emprego podem ser citados o aço inoxidável ASTM F138, a liga à base de Co-Cr-Mo, e a liga Ti-6Al-4V [2][3][4][5][6][7][8][9][10], sendo este última a mais apropriada para implantes femorais devido à sua alta resistência mecânica, menor módulo de elasticidade e excelente resistência à corrosão [6,7,9,10]. No entanto, nos últimos anos a literatura vem registrando diversos estudos sobre a toxidade dos elementos de liga e a reabsorção óssea como fatores que causam a falha de implantes [7,[9][10][11][12][13][14][15]. Essas preocupações têm estimulado o estudo de novas ligas de titânio que apresentem elementos biocompatíveis e possuam baixos módulos de elasticidade a fim de minimizar a reabsorção óssea, além de oferecer uma elevada resistência à corrosão, uma vez que tais materiais serão usados em meio fisiológico, o qual é bastante agressivo aos metais presentes na composição da liga [3,16].…”

Section: Introductionunclassified

“…Essas preocupações têm estimulado o estudo de novas ligas de titânio que apresentem elementos biocompatíveis e possuam baixos módulos de elasticidade a fim de minimizar a reabsorção óssea, além de oferecer uma elevada resistência à corrosão, uma vez que tais materiais serão usados em meio fisiológico, o qual é bastante agressivo aos metais presentes na composição da liga [3,16]. Essas características desejáveis apontam para a classe de ligas de titânio do tipo  contendo elementos, tais como: Nb, Ta, Zr e Si [6,11,12]. No caso específico do nióbio há a vantagem do Brasil ser praticamente o único produtor desse metal com 98% das reservas mundiais [17], o que possibilita a obtenção de ligas com preços mais acessíveis à população.…”

Section: Introductionunclassified

RESISTÊNCIA À CORROSÃO DE LIGAS Ti-35Nb-xTa EM SOLUÇÃO DE NaCl 0,9%

Macedo¹,

Matos²,

Souza³

2018

ABM Proceedings

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ResumoNeste trabalho, o comportamento eletroquímico das ligas Ti-35Nb-xTa (x = 0; 2,5; 5,0; 7,5)Ta (% em peso), solubilizadas e resfriadas em água, foi investigado em meio de NaCl a 0,9% mol/L através de testes de polarização anódica e medidas de impedância, micrografias e DRX. Os ensaios eletroquímicos mostraram que as ligas contendo tântalo apresentam uma maior resistência à corrosão que a liga sem tântalo. Além disso, os ensaios eletroquímicos em conjunto com as micrografias e DRX indicam que a composição Ti-35Nb-5Ta é a que apresenta maior resistência à corrosão no meio estudado, pois além de ocorrer uma estabilização da fase , o refino do grão foi menos pronunciado e por esse motivo minimizou o surgimento de microcélulas eletroquímicas. Palavras-chave: Ligas de titânio; Resistência à corrosão; Biomateriais. CORROSION RESISTANCE OF Ti-35Nb-xTa ALLOYS IN 0.9% NaCl SOLUTION AbstractThis work is a study of the electrochemical behavior of the Ti-35Nb-xTa alloys (x = 0, 2.5, 5, 7.5) (wt. %), solution treated and quenched in water. Anodic polarization tests and impedance measurements were carried out in these compositions by using a solution of 0.9% NaCl; their microstructures and XRD patterns were also obtained. The results showed that the alloys containing tantalum have a higher corrosion resistance than that one without Ta. In addition, electrochemical tests, together with the micrographs and XRD, indicate that the Ti-35Nb-5Ta composition is the most resistant to corrosion in the medium analyzed. This fact is a consequence of the stabilization of the  phase, and of its grain size, where the refinement effect of Ta is not enough strong and minimizes the formation of electrochemical microcells.

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“…In early stage, the titanium alloys composed of nontoxic elements that have been developed are mainly a?b type ones. Therefore, the trend in research and development of titanium alloys for biomedical applications is to develop b titanium alloys composed of nontoxic elements such as Nb, Ta, Zr, Mo, and Sn [9][10][11]. These alloys have lower elasticity modulus, higher strength, excellent corrosion resistance, and better toughness to compar with the a and a?b titanium alloys [9,10].…”

Section: Introductionmentioning

confidence: 99%

Wear and Electrochemical Corrosion Behavior of Biomedical Ti–25Nb–3Mo–3Zr–2Sn Alloy in Simulated Physiological Solutions

et al. 2014

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The wear and electrochemical corrosion behavior of the biomedical Ti-25Nb-3Mo-3Zr-2Sn (TLM) titanium alloy was investigated in various simulated physiological solutions. Different simulated physiological solutions comprised phosphate-buffered solution (PBS), PBS with bovine serum albumin (PBS?BSA), and PBS with hyaluronic acid (PBS?HA) were employed. A potentiostat and a reciprocating friction and wear tester were used to study the wear and corrosion behavior of the TLM alloy. The influence of the chemical composition of the simulated solutions on the tribo-electrochemical behavior was considered by potentiodynamic studies under reciprocating friction and wear conditions. It was found that the corrosion tendency of the TLM alloy was the most obvious in PBS?HA under static corrosion condition, while it was just opposite with wear. Compared with static corrosion, the corrosion resistance of the TLM alloy was decreased with sliding conditions. The values of i corr were two orders of magnitude higher than those at static corrosion. This phenomenon shows that the wear accelerated corrosion. Under coexisting condition of both electrochemical corrosion and wear, the wear rate of the TLM alloy mutually influenced by both factors will be accelerated. Plastic grooves and deformation were observed on the worn surfaces of the TLM alloy by scanning electron microscopy (SEM). Through the observation of SEM, the tribological mechanism was a typical corrosive wear, and the main wear mechanisms were abrasive with adhesive wear under the interaction between corrosion and wear. The XPS results show that the passive films include the TiO

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Recent research and development in titanium alloys for biomedical applications and healthcare goods

Cited by 848 publications

References 31 publications

Imprecise knowledge based design and development of titanium alloys for prosthetic applications

Imprecise knowledge based design and development of titanium alloys for prosthetic applications

RESISTÊNCIA À CORROSÃO DE LIGAS Ti-35Nb-xTa EM SOLUÇÃO DE NaCl 0,9%

Wear and Electrochemical Corrosion Behavior of Biomedical Ti–25Nb–3Mo–3Zr–2Sn Alloy in Simulated Physiological Solutions

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