Effect of Ti on microstructure, mechanical properties and corrosion resistance of Zr-Ta-Ti alloys processed by spark pla
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Effect of Ti on microstructure, mechanical properties and corrosion resistance of Zr-Ta-Ti alloys processed by spark plasma sintering XUE Guo-lin(薛国林)1, YANG Hai-lin(杨海林)1, XING Hai-xia(邢海霞)2, YE Chuan-ren(叶传仁)1, LIU Jue(刘珏)3, MIAO Jing-lei(苗惊雷)4, RUAN Jian-ming(阮建明)1 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. Department of General Dentistry, Peking University, School and Hospital of Stomatology, Beijing 100081, China; 3. Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha 410004, China; 4. Department of Orthopedics, The Third Xiangya Hospital of Central South University, Changsha 410013, China © Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: The microstructure, mechanical properties and corrosion resistance of Zr-30%Ta and Zr-25%Ta-5%Ti alloy prepared by spark plasma sintering (SPS) technology were investigated. The experimental results showed that the Zr-Ta-Ti alloys made by the SPS processing have a low level of porosity with the relative density of 96%−98%. The analyses of XRD and TEM revealed that the Zr-30Ta alloy consists of α+β phase, and the Zr-25Ta-5Ti alloy belongs to the near β type alloy containing a small amount of α and ω phases. With the addition of Ti, the elastic modulus of the alloys was decreased from (99.5±7.2) GPa for Zr-30Ta alloy to (73.6±6.3) GPa for Zr-25Ta-5Ti alloy. Furthermore, it is shown that, in comparison to CP-Ti and Ti-6Al-4V alloy, the Zr-Ta-Ti alloy produced in this work offers an improved corrosion resistance due to the more stable ZrO2 and Ta2O5 generated in the passivation film on the surface of the alloys. This study demonstrates that Zr-Ta-Ti alloys are a promising candidate of novel metallic biomaterials. Key words: spark plasma sintering; mechanical properties; microstructure; corrosion resistance; Zr alloy Cite this article as: XUE Guo-lin, YANG Hai-lin, XING Hai-xia, YE Chuan-ren, LIU Jue, MIAO Jing-lei, RUAN Jian-ming. Effect of Ti on microstructure, mechanical properties and corrosion resistance of Zr-Ta-Ti alloys processed by spark plasma sintering [J]. Journal of Central South University, 2020, 27(8): 2185−2197. DOI: https://doi.org/10.1007/s11771-020-4440-9.
1 Introduction Biomedical implant materials have attracted increasing attentions in the past decades. In general, the medical implants are mainly categorized as polymers, ceramics and metals, of which the metallic materials are more favorable as biomedical
implant materials due to their excellent combination of strength and toughness in association with corrosion resistance [1, 2]. The conventional implant materials based on titanium and titanium alloys such as Ti-6Al-4V have been widely used. However, there are still many problems with these implant materials. Firstly, the elastic modulus of titanium and titanium alloys is at a level of 100−
Foundation item: Project(51404302) supported by the National Natural Science Foundation of Chi
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