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Wang J.,Nanchang University | Wang J.,Jiangxi Science and Technology Normal University | Liu Y.,Nanchang University | Ding H.-Y.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices
Cailiao Gongcheng/Journal of Materials Engineering | Year: 2014

TiO2 thin films were prepared by sputtering on 316L stainless steel and fused quartzes. The microstructure and surface morphology of the films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atom force microscopy (AFM). The results indicate that the as-deposited TiO2 thin film has uniform and crack-free surface with anatase structure. The rutile phase is formed in the film annealed at 600℃. The calculated optical band-gap of the films is around 3.2 eV based on transmission spectra. The potentiodynamic polarization is tested in PBS simulated body solution. It shows that the corrosion resistance of 316L stainless steel is improved with TiO2 thin films. The corrosion potential shifts positively +94 mV for the annealed TiO2 thin film. While, it has the lowest corrosion current density (4.828μA·cm-2). ©, 2014, Beijing Institute of Aeronautical Materials (BIAM). All right reserved. Source


Li A.,Huaiyin Institute of Technology | Xu H.,Huaiyin Institute of Technology | Feng L.,Huaiyin Institute of Technology | Feng L.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices
International Journal of Electrochemical Science | Year: 2014

NiO/palygorskite composites had been fabricated by combining hydrothermal and calcining methods. The structure, morphology, surface area and pore distribution of the as-prepared NiO/palygorskite composites were characterized by the techniques such as powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectrum (EDS) and Brunauer-Emmett-Teller (BET). The synthesized NiO/palygorskite composite had larger BET surface area of 129.2 m2/g. The obtained NiO/palygorskite composites showed high specific capacitance of 1085.3 F/g at current density of 0.25 A/g. © 2015 The Authors. Source


Zhang L.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices | Zhang L.,Xian Jiaotong University | Guo X.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices | Sun Q.,Xian Jiaotong University | And 4 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2013

After solution treatment, Ti-10Mo-8V-1Fe-3.5Al (TB3) alloy was aged at 500°C under a compressive stress. TEM results show that several α variants are observed in conventionally aged samples. However, in the stress-aged TB3 samples, most α plates are parallel to each other in one β grain, which indicates a variant selection effect. Two kinds of TB3 samples were selected for low cycle fatigue tests, which had been heat treated to the same strength level. The one was conventionally aged at 500°C for 9 h, and the other was aged at 500°C for 6 h with about 200 MPa compressive stress. Low cycle fatigue (LCF) test results show that the stress-aged TB3 samples exhibit a longer LCF lifetime than the conventionally aged ones. Copyright © 2013, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved. Source


Zhang L.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices | Zhang L.,Xian Jiaotong University | Zhang M.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices | Guo X.,Jiangsu Provincial Key Laboratory for Interventional Medical Devices | And 6 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2014

Solution treated Ti-2.5Cu alloy was aged under a compressive stress of ~200 MPa. TEM investigations show that three variants of precipitated Ti2Cu plates are observed in conventionally aged samples without compressive stress. However, in the stress-aged samples, for most grains, one or two variants of Ti2Cu plates could be observed, which indicate the variant selection effect of precipitated Ti2Cu plates resulting from external compressive elastic stress. Lower yield strength and higher elongation is observed during subsequent tensile tests due to the variant selection effect. Source

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