Selective laser sintered porous Ti–(4–10)Mo alloys for biomedical applications: Structural characteristics, mechanical properties and corrosion behaviour

Xie, Fangxia; He, Xiao; Lv, Yanming; Wu, Meiping; He, Xiaocong; Qu, Xuanhui

doi:10.1016/j.corsci.2015.03.005

Cited by 68 publications

(28 citation statements)

References 59 publications

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“…Thus, the formation of ω phase during cooling is suppressed in high β stable Ti-Mo alloy. 6,8) Zhao et al also found that ω phase is formed in the metastable β type alloys with different Mo contents and disappeared in Ti-Mo alloys with high Mo content. 13) Ti-Mo alloys are not always the most suitable for the particular purpose.…”

Section: Introductionmentioning

confidence: 99%

“…It is remarkable that the Ti-8Mo exhibits the highest mechanical properties among the porous Ti-(4-10 mass%)Mo alloys. 8) Powder metallurgy (P/M) methods offer varied types of materials with the objective of achieving higher strength, hardness and wear resistance for composite materials such as Cobalt-based alloys and Titanium-based alloys powders. 7) Conventional P/M involves mixing the metal powders, compacting of the mixed powders into molds and then sintering of the compact powders under the different atmospheres.…”

Section: Introductionmentioning

confidence: 99%

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Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

et al. 2016

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In this study, three different powders are mixed and used to produce Ti-8Mo-xNi alloys in three different proportions: Ti-8Mo-4Ni, Ti8Mo-6Ni and Ti-8Mo-8Ni. The Ti-Mo-Ni alloys simultaneously undergo various vacuum sintering temperatures of 1125, 1150, 1175 and 1200 C, respectively. The experimental results show that the Ti-8Mo-8Ni alloys acquire a higher sintering density (98.9%) and hardness (52.1 HRC) after sintering at 1175 C for 1 h. However, due to the grain growth and increased amount of nickel in the Ti-8Mo-8Ni alloys, the transverse rupture strength (TRS) shows an obvious decrease (as compared with Ti-8Mo-6Ni, the TRS value decreasing from 1177 to 685 MPa). Consequently, the suitable Ni content of the Ti-8Mo-6Ni alloys which proves advantageous to the TRS results from the uniform distribution of the TiNi intermetallic compound precipitates within the β matrix. The sintered Ti-8Mo-8Ni alloys also possess the lowest corrosion current (I corr = 1.87 × 10 −7 A·cm −2) and highest polarization resistance (56084 Ω·cm 2 ) in 3.5 mass% NaCl solutions. This result con rms that sintered Ti-8Mo-8Ni alloys effectively improve corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

et al. 2016

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“…The latter is relevant to biochemical compatibility. The Young's moduli of the aforementioned metals ranging from 120 to 232 GPa are substantially larger than those of cancellous (1 -2 GPa) and cortical (20)(21)(22)(23)(24)(25)(26)(27) bones [5]. Therefore, stress shielding, a critical issue in hard tissue replacement, which originates from the mismatch of Young's modulus, may cause osteoporosis of the surrounding bone tissue.…”

Section: Introductionmentioning

confidence: 99%

“…As an additive and rapid prototyping manufacturing technology, selective laser sintering (SLS) involves the use of a laser to sinter the powders, focusing the laser automatically at points in space defined by a three-dimensional model, binding the material together to create a solid structure in a layer-by-layer manner [24,25].…”

Section: Selective Laser Sinteringmentioning

confidence: 99%

Current developments of biomedical porous Ti–Mo alloys

Wang

2017

International Journal of Materials Research

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Current developments of biomedical porous Ti-Mo alloysAs a biomedical hard tissue implant candidate, porous Ti-Mo alloy has received considerable attention because of its special porous structure, appropriate Young's modulus and compressive strength as well as good corrosion resistance. As a bioactive coating, hydroxyapatite is commonly used to cover the surface of bioinert metallic prostheses due to its excellent biocompatibility, bone-like structure and composition. This article reviews the current developments and the relationships between the fabrication methods, porous structure, mechanical properties, bioactive surface modification and corrosion behavior of porous Ti-Mo alloy used for hard tissue implant application. Furthermore, the future research directions are discussed to optimize the porous structure and improve the properties of porous Ti-Mo alloys.

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“…Previous researches have studied the phase transformations and mechanical properties of different Ti-Mo alloys, and found that the phase constitutions, elastic modulus and hardness are different for Ti-Mo alloys with different Mo contents [3,4]. It is remarkable that the Ti-8Mo exhibits the highest mechanical properties among the porous Ti-(4-10 wt%)Mo alloys [2,5]. Powder metallurgy (P/M) methods offer various types of materials with the objective of achieving higher strength, hardness and wear resistance for composite materials such as titanium-based alloys powders.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Microstructures, Mechanical Properties and Corrosion Behaviours of Ti-8Mo-6Ni Alloys Adding NbC PowdersviaVacuum Sintering Process

et al. 2017

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Abstract. In this study, the Ti-8Mo-6Ni alloys are subjected to add various amounts of NbC carbides as a strengthening phase after the sintering process. Meanwhile, the composite materials underwent a vacuum sintering process at different temperatures of 1175°C, 1225°C and 1275°C for 1 h, respectively. To evaluate the microstructure, mechanical properties and corrosion behaviors of the Ti-8Mo-6Ni alloys adding NbC via the vacuum sintering processes, tests on the relative density, hardness, transverse rupture strength (TRS), corrosion and microstructure inspections are performed using XRD and SEM, with the aim of improving the microstructure and properties of sintered Ti-8Mo-6Ni alloys. The experimental results showed that when 1 wt% of NbC carbides is added to the Ti-8Mo-6Ni alloys they possessed the optimal properties after sintering at 1275°C for 1 h. The sintering density increased to about 99.7%, the hardness is enhanced to 48.1 HRC and the TRS increased to 976 MPa. Meanwhile, the sintered composite materials possessed good corrosion resistance.

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Selective laser sintered porous Ti–(4–10)Mo alloys for biomedical applications: Structural characteristics, mechanical properties and corrosion behaviour

Cited by 68 publications

References 59 publications

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

Current developments of biomedical porous Ti–Mo alloys

Investigation of the Microstructures, Mechanical Properties and Corrosion Behaviours of Ti-8Mo-6Ni Alloys Adding NbC PowdersviaVacuum Sintering Process

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