A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

Zhang, Lai-Chang; Chen, Liang Yu

doi:10.1002/adem.201801215

Cited by 691 publications

(290 citation statements)

References 368 publications

(380 reference statements)

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“…For example, Ti–6Al–4V (in wt%; the same hereafter), which is the first successfully developed Ti alloy, has been widely used for aerospace purposes for its attractive combined performance in strength, plasticity, toughness, and heat resistance . The annealed Ti–6Al–4V exhibits an ultimate tensile strength of about 895–930 MPa and plasticity of 6–10% . Ti–10V–2Fe–3Al (Ti–1023) exhibits excellent forging performance, high ultimate tensile strength, and high damage tolerance .…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

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Thanks to a considerable number of fascinating properties, titanium (Ti) and Ti alloys play important roles in a variety of industrial sectors. However, Ti and Ti alloys could not satisfy all industrial requirements; the degradation of Ti and Ti alloys always commences on their surfaces in service, which declines the performances of Ti workpieces. Therefore, with aim to further improve their mechanical, corrosion and biological properties, surface modification is often required for Ti and Ti alloys. This article reviews the technologies and recent developments of surface-modification methods with respect to Ti and Ti alloys, including mechanical, physical, chemical, and biochemical technologies. Conventional methods have limited improvement in the properties and/or restriction on the geometry of workpieces. Therefore, many advanced surfacemodification technologies have emerged in recent decades. New methods make Ti and Ti alloys have better performance and extended applications. With requirement of high surface properties in future. Understanding the mechanism in various surface-modification methods, combining the advantages of current technologies and developing new coating materials with high performance are required urgently. As such, incorporation of different surface-modification technologies with high-performance modified layers may be the mainstream of surface modifications for Ti and Ti alloys. . His current research interests focus on the metal additive manufacturing (e.g., selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructureproperties in high-performance materials.

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Section: Introductionmentioning

confidence: 99%

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

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“…Because of their wide applications, powder feedstocks are used in many industries to produce bulk and/or porous materials by various technologies, such as thermal spraying [1,2], additively manufacturing [3][4][5][6], powder metallurgy [7][8][9], and laser processing [10][11][12]. These processing methods generally employ a heat source to melt a metallic powder in specific ways and then the final products can be obtained after processing.…”

Section: Introductionmentioning

confidence: 99%

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

Sang

Chen

Zhao

et al. 2019

Metals

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Particle size is a critical consideration for many powder coating-related industries since it significantly influences the properties of the produced materials. However, the effect of particle size on the characteristics of plasma sprayed NiCrBSi coatings is not well understood. This work investigates the microstructures, hardness and electrochemical corrosion behavior of plasma sprayed NiCrBSi coatings synthesized using different-sized powders. All coatings mainly consist of Ni, N 3 B, CrB, Cr 7 C 3 and Cr 3 C 2 phases. The coatings produced by small particles (50-75 µm) exhibit lower porosity (2.0 ± 0.8%). Such coatings show a higher fraction (15.5 vol.%) of the amorphous phase and lower hardness (700 HV 0.5 ) than the counterparts (8.7 vol.% and 760 HV 0.5 , respectively) produced by large particles (75-100 µm) with higher porosity (3.0 ± 1.6%). Meanwhile, the coatings produced from smaller particles possess a larger number of non-bonded boundaries, leading to the easier penetration of corrosive medium, as well as a higher corrosion current density (0.254 ± 0.062 µA/cm 2 ) and a lower charge transfer resistance (0.37 ± 0.07 MΩ cm 2 ). These distinctions are attributed to particle size-induced different melting degrees and stackings of in-flight particles during deposition. studied the effects of particle size and structure on the preferential Ce evaporation for La 2 Ce 2 O 7 particles during plasma spraying and indicated that the evaporation loss of Ce is significantly influenced by particle size, thereby affecting the properties of the as-sprayed La 2 Ce 2 O 7 coatings. Sun et al. [16] used different-sized WC powders to sinter three sets of WC-8Co cemented carbides and found that the transgranular fractures of the prepared cemented carbides are more evident with increasing WC particle size. From all this one can conclude that powder appearance potentially influences the properties and therefore the end applications of the produced products.NiCrBSi alloy coatings are also commonly prepared by metallic powder-related techniques including spraying [17,18] and laser cladding [19,20], with the aim to produce barriers to protect substrates from wear and/or corrosion. Amongst these techniques, atmospheric plasma spraying (APS) is frequently used due to its high synthesis speed and few limitations on equipment [21]. APS adopts a plasma gun as a heat source to melt the feedstock powder sprayed from the nozzle and impinges these powder particles on the substrates in a layer by layer method [22]. As a result, this processing method results in a typical lamellar microstructure in APS-prepared NiCrBSi coatings associated with a large number of pores and non-bonded boundaries (including lamellar boundaries and particle boundaries). Pores generally decrease the cohesion of the as-sprayed NiCrBSi coatings, thereby reducing their hardness and wear resistance [22]. In the meantime, non-bonded boundaries in as-sprayed NiCrBSi coatings provide diffusion paths for the ingress of corrosive species in a corrosive environment [22]. ...

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“…Among all the properties that metastable β‐Ti alloys offer, their low modulus is especially important for application of these alloys to biomedical implants for repair or replacement of hard tissue. Introducing porosities into structure of β‐Ti alloys reduces the modulus of materials to even lower values and closer to the human cortical bone moduli; make them more favorable for biomedical applications . In this regard, tailoring the mechanical properties of porous Ti‐alloys is achievable by optimizing the size, shape, and distribution of pores within the Ti structure.…”

Section: Introductionmentioning

confidence: 99%

“…Introducing porosities into structure of β-Ti alloys reduces the modulus of materials to even lower values and closer to the human cortical bone moduli; make them more favorable for biomedical applications. [18][19][20] In this regard, tailoring the mechanical properties of porous Ti-alloys is achievable by optimizing the size, shape, and distribution of pores within the Ti structure.…”

Section: Introductionmentioning

confidence: 99%

Properties of Powder Metallurgy‐Fabricated Oxygen‐Containing Beta Ti–Nb–Mo–Sn–Fe Alloys for Biomedical Applications

et al. 2019

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The influence of minor oxygen additions on the microstructure and mechanical properties of powder metallurgy (PM) fabricated Ti–25Nb–5Mo–3Sn–2Fe alloy is studied. The results demonstrate the positive influence of a certain oxygen content (0.35 wt%) on the microstructure and mechanical properties of sintered samples. Despite the presence of 7.0% porosity in the PM‐fabricated samples of Ti–25Nb–5Mo–3Sn–2Fe–0.35O, a high strength of 682 MPa, elongation of 7.2%, and Young's modulus of 74 GPa are obtained. The strength‐to‐modulus ratio of this alloy is higher than most common Ti biomedical alloys, indicating that this alloy may have better suitability for orthopedic applications. Deviation in the oxygen content of the alloy from 0.35 wt% negatively impacts on the ductility of the samples.

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A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

Cited by 691 publications

References 368 publications

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

Properties of Powder Metallurgy‐Fabricated Oxygen‐Containing Beta Ti–Nb–Mo–Sn–Fe Alloys for Biomedical Applications

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