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Wu Y.-C.,Hefei University of Technology | Wu Y.-C.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | Wang Y.,Hefei University of Technology | Cui J.-W.,Hefei University of Technology | And 4 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2011

TiO2 is one of the most important inorganic materials for its multiple applications. The controllable synthesis of one-dimensional nanostructured TiO2 (1D-TiO2) is a very complex process due to the various morphologies of the 1D-TiO2, such as 1D-TiO2 nanofiber, nanowire, nanobelt, nanorod, nanoribbon, nanotube. Researchers all around the world have developed a variety of controllable synthesis methods, for instance, electrospinning, hydrothermal treatment, template formation and electrochemical anodization. Recent advances in the controllable synthesis of 1D-TiO2 and their applications are presented in this paper. The influences of the synthesis parameters on the structures and morphologies of the as-prepared nanomaterials are systematically analyzed during the controllable synthesis process. And we also present the future development of the 1D-TiO2, providing a reference for the potential morphologies and applications of the 1D-TiO2 nanomaterials. Source


Qin Y.,Hefei University of Technology | Qin Y.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | Wu Y.,Hefei University of Technology | Wu Y.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | And 5 more authors.
Advanced Materials Research | Year: 2011

In this paper, we systematically investigated the influence of SiC particle size on the wear properties of the SiC particle reinforced Cu matrix composite prepared by powder metallurgy process. Under low load (≤120N), the increase of the SiC particle size contributes to the improvement of the abrasive resistance and the main abrasion mechanism is abrasive wear. With the increase of the load, the large SiC particle is easy to break and exfoliate, leading to delamination wear and the decrease of the strength. Under higher load (≥120N), the small size of the SiC reinforcement particle which can reduce the plastic deformation of the subsurface efficiently has significant enhancement effect of the SiC/Cu composite, avoiding delamination fracture. © (2011) Trans Tech Publications, Switzerland. Source


Hong Y.,Hefei University of Technology | Hong Y.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | Wu Y.,Hefei University of Technology | Wu Y.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | And 4 more authors.
Advanced Science Letters | Year: 2012

In order to obtain SiC/Al composites reinforced with high volume fraction, In this paper, double size distribution SiC powders with different size ratios were used to prepare the SiC preforms by self-oxidation bonding at low temperature, liquid aluminum alloy spontaneous infiltration into the SiC preforms which were putted in the crucible furnace filled with nitrogen gas. SiC/Al composites with different SiC particle sizes and different SiC volume fractions were successfully achieved by pressureless infiltration routine. The composition, microstructure and micro-morphology of SiC/Al composites were analyzed by optical microscope (OM), scanning electron microscope (SEM), energy dispersion spectrometer (EDS) and X-Ray diffraction (XRD). The effects of SiC volume content on the mechanical and thermal properties of the composites were also examined. When the content of Fe(NO 3) 3 was 10 wt%, the volume fraction of SiC preform was 60%, the flexural strength of the SiC/Al composite reached 380 MPa, and the thermal conductivity was 123 W·m -1 ·K -1. © 2012 American Scientific Publishers All rights reserved. Source


Cao J.,Hefei University of Technology | Cao J.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | Huang X.,Hefei University of Technology | Huang X.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | And 6 more authors.
Advanced Materials Research | Year: 2012

Cu-0.2wt%Cr-0.5wt%Zr-0.1wt%RE(La) was prepared by casting, quenching, rolling and aging. The microstructure was studied by electron microscope and the texture components were studied by electron backscattered diffraction. In the cast alloy, pure chromium distributed near the grain boundary as a strip shaped and Cu5Zr phase distributed in the interior of grain as a shape of granules. The texture components of the rolled plate include {110}<112> and {112}<111>. With the rolling ratio increased, {112}<111> texture component became the primary rolling texture component. The strengthening effect was attributed to the refinement of the grain size. The electron conductivity was mainly affected by the misorientation of the grain size with a high rolling ratio. © (2012) Trans Tech Publications. Source


Han H.,Hefei University of Technology | Han H.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | Huang X.,Hefei University of Technology | Huang X.,Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province | And 6 more authors.
Advanced Materials Research | Year: 2012

The Cu-40wt%Zn-1.0wt%Bi-1.0wt%Mn bismuth-brass was prepared by casting and annealing. The microstructure was investigated by scanning electron microscopy (SEM), the phase composition was analyzed by X-ray diffraction (XRD), and the properties of mechanics and cutting were tested, too. The results show that the bismuth-rich phase is mainly distributed in the grain boundary as the shape of granules, which lead to the mechanics property and cutting property of bismuth-brass can basically reach the requirements of replace the traditional cutting-free brasses. © (2012) Trans Tech Publications, Switzerland. Source

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