Low elastic modulus Ti–Ta alloys for load-bearing permanent implants: Enhancing the biodegradation resistance by electrochemical surface engineering

Kesteven, Jazmin; Kannan, M. Bobby; Walter, R.; Khakbaz, Hadis; Choe, Han-Choel

doi:10.1016/j.msec.2014.10.038

Cited by 27 publications

(17 citation statements)

References 27 publications

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“…Although, they have relatively low tensile strength, their high thermal stability leads to reasonable creep resistance and toughness. Upon heating above 882 °C, the pure α ‐Ti can be transformed to the bcc β ‐Ti phase, which is of great interest in the biomedical area, since it exhibits very low elastic moduli, closer to that of human bone . In order to obtain the β ‐alloys at lower temperatures (<882 °C), transition elements are added since they stabilize the β phase by adding conduction electrons to titanium which makes the hexagonal structure less favorable .…”

Section: Introductionmentioning

confidence: 99%

Compositional and Tribo‐Mechanical Characterization of Ti‐Ta Coatings Prepared by Confocal Dual Magnetron Co‐Sputtering

et al. 2017

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Titanium-Tantalum coatings are deposited by magnetron co-sputtering technique, using independently driven titanium and tantalum targets. The effect of the Ta content on the structure, mechanical, and wear properties of Ti films is investigated. It is found that the percentage of the added Ta varies linearly from 3.7 to 31.3 at% by increasing the power applied to the Ta target from 10 to 100 W. The XRD results show that the coatings are crystalline, and there is no evidence of the formation of intermetallic phases, instead formation of metastable phases of α 00 and β depending on Ta content are observed, though the samples are deposited at low temperature (150 C). It is shown that the elastic strain to failure (H/E r ; hardness to reduced elastic moduli ratio) can be increased by 40% through the formation of crystalline phases with a lower E, while the hardness remains constant. The tribological study shows that increasing the Ta content up to 14.9 at% causes a significant improvement in adhesion of the coating to a soft metallic substrate.

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Section: Introductionmentioning

confidence: 99%

Compositional and Tribo‐Mechanical Characterization of Ti‐Ta Coatings Prepared by Confocal Dual Magnetron Co‐Sputtering

et al. 2017

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“…Fluorides can cause destruction of the inert layer, which substantially increases the corrosion rate of the implant [35]. In previous studies, researchers have used various materials and methods such as a mechanicalresistant bioactive layer, a plasma spray, a sol-gel, electrochemical deposition techniques, acidetching, and anodic oxidation on the surface of the materials to improve their antibacterial properties, corrosion resistance, and biocompatibility [25,36,37]. However, these materials and methods were largely unsuccessful.…”

Section: Methodsmentioning

confidence: 99%

“…In fact, the addition of different elements can enhance specific properties of the material. For example, the addition of Mo to Ti enhances its porosity, thus reducing its Young's modulus [23]; the addition of Ta to Ti forms a stable coating on the surface of the Ti from the high chemical activity of Ta imparting higher chemical stability and corrosion resistance to the Ti-Ta alloy [24,25]; and the addition of Nb to Ti improves shape memory, which is beneficial to its application in the biomedical field [18,26].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Properties and Corrosion Resistance of the Newly Developed Biomaterial, Ti–12Nb–1Ag Alloy

Chao

Chiu

et al. 2017

Metals

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Currently, the development of biomaterials has focused on having a low Young's modulus, biocompatibility, corrosion resistance, and antibacterial properties. Ti-Nb alloys have higher research value due to their excellent corrosion resistance and low Young's modulus. In recent years, the antibacterial properties of materials have been enhanced by the addition of Ag and Cu. Therefore, the corrosion resistance and antibacterial properties of the Ti-12Nb-1Ag alloy formulated in the current study were investigated and compared to those of commonly used Ti alloys, G2 pure Ti (ASTM B348 CP Grade 2), and Ti-6Al-4V, via electrochemical and E. coli antibacterial tests. Meanwhile, we also carried out a microstructural analysis to investigate the composition of the alloy. The results were as follows: (1) The electrochemical test demonstrated that Ti-12Nb-1Ag had a higher corrosion resistance than Ti-6Al-4V, which is similar to the properties of pure Ti. (2) The E. coli antibacterial test demonstrated that the sterilization rate of Ti-12Nb-1Ag was higher than that of the Ti-6Al-4V alloy and pure Ti. (3) The microstructural analysis revealed that Ti-12Nb-1Ag had an acicular martensite structure, with nano-Ag precipitates observed. Based on the results of the E. coli antibacterial test and the principles of sterilization of nano-precipitates and Ag, we inferred that the nano-Ag precipitates of Ti-12Nb-1Ag enhanced the antibacterial properties of the newly developed biomaterial, which is, namely, the Ti-12Nb-1Ag alloy.

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Section: Introductionmentioning

confidence: 99%

“…Enhancing the biocompatibility of temporary or permanent implants is critical for their successful service, that is to prevent implant rejection. Surface engineering methods have been widely researched for improving the biocompatibility of metallic implants (Kesteven, Kannan, Walter, Khakbaz, & Choe, 2015; Liu, Rath, Tingart, & Eschweiler, 2020; Razavi, Fathi, Savabi, Vashaee, & Tayebi, 2014). Numerous materials and techniques have been tested for this purpose (Kannan, Walter, Yamamoto, Khakbaz, & Blawert, 2018; Müller et al., 2005; Surmeneva, Mukhametkaliyev, Khakbaz, Surmenev, & Bobby Kannan, 2015); however, calcium phosphate (CaP) coating has been very popular for a number of reasons, including bone composition being ~69 wt% of CaP and it is relatively easy to deposit CaP on metals.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable 3D porous zinc alloy scaffold for bone fracture fixation devices

et al. 2020

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et al., 2016) metal that has potential implant applications such as bone fracture fixation devices. Being an essential nutrient for human body, zinc is required for many different biological functions such as wound healing (Andrews & Gallagher-Allred, 1999), cell proliferation and DNA stabilization (MacDonald, 2000; Wu & Wu, 1987). Furthermore, zinc possesses anti-inflammatory effects and is haemocompatible and used by the human body as a hormone mediator (Beyersmann & Haase, 2001; Tapiero & Tew, 2003). Although the daily recommended dietary allowance (RDA) for zinc is limited to 8-11 mg/day, zinc overdose (10 times the RDA) has shown no adverse effects in humans (Samman & Roberts, 1987). In fact, a study has shown that high concentrations of zinc prevent conditions like osteoporosis (Luo et al., 2014). The physical and mechanical properties of metallic zinc (density = 7.14 g/cm 3 ; young's modulus = 70 GPa, and ultimate tensile strength (UTS) = 126-246 MPa; Porter, 1991) are similar to those of other metallic implant materials. For orthopaedic temporary implants for bone fracture fixation (e.g. bone plates), the implant material should possess excellent load-bearing capacity during service.

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Low elastic modulus Ti–Ta alloys for load-bearing permanent implants: Enhancing the biodegradation resistance by electrochemical surface engineering

Cited by 27 publications

References 27 publications

Compositional and Tribo‐Mechanical Characterization of Ti‐Ta Coatings Prepared by Confocal Dual Magnetron Co‐Sputtering

Compositional and Tribo‐Mechanical Characterization of Ti‐Ta Coatings Prepared by Confocal Dual Magnetron Co‐Sputtering

Antibacterial Properties and Corrosion Resistance of the Newly Developed Biomaterial, Ti–12Nb–1Ag Alloy

Biodegradable 3D porous zinc alloy scaffold for bone fracture fixation devices

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