Chen W.,Foshan Polytechnic
Jinshu Rechuli/Heat Treatment of Metals | Year: 2014
Effects of Sr content and the vibration solidifying amplitude on the microstructure and mechanical properties of cast AM50-Y magnesium alloy were studied. The results show that with the increase of amplitude, the grain size of the alloy decreases, the bulk or bandlike phase in mircostructure of the alloy becomes to dispersive spots and the tensile strength, yield strength and elongation increase gradually that reaches maximum value when the amplitude is 2.5 mm. With the increase of Sr content, the grain size of the alloy with 2.5 mm amplitude is smaller than that without vibration alloy, the tensile strength, yield strength and elongation increase.
Zhao X.,Sun Yat Sen University |
Duan C.,Foshan Polytechnic |
Liang Z.,Sun Yat Sen University |
Shen H.,Sun Yat Sen University |
Shen H.,ShunDe SYSU Institute for Solar Energy Systems
RSC Advances | Year: 2014
Silver nanoparticle arrays are well known to show characteristic surface plasmon properties sensitively dependent on the particles size, shape, surrounding dielectric and so on. In the present study, we investigated the influence of the silver film thicknesses, the dielectric materials and the annealing temperatures on the morphologies and the corresponding optical properties of silver nanoparticle arrays produced by thermal treatment of silver thin films. Different levels of dependence of array morphologies on the original silver film thicknesses, the dielectric environment and annealing conditions were identified. The variations of surface plasmon absorption bands can be correlated and explained by the morphological features, such as the particle size, aspect ratio, and coverage fraction. This correlation may be employed for the manipulation of desirable optical properties. Moreover, we attempted to integrate silver nanoparticle arrays into crystalline silicon solar cells and excellent light-trapping and spectrum-modification performance was observed. © 2014 The Royal Society of Chemistry.
Yu Q.S.,Foshan Polytechnic |
Zhang J.,China Institute of Technology |
Peng J.X.,China Institute of Technology
Advanced Materials Research | Year: 2013
Based on the Joint Video Team (JVT) of the ITU-T Video Coding Experts Group VC EG and the IS O/IEC Moving Picture Experts Group MPEG, an RD optimal Macro Block mode decision scheme for Internet error channel streaming is introduced. The scheme employs the luminance Rate Distortion (RD) optimal mode decision scheme so as to take the effects of video encoding distortion and the channel error propagation to get higher error robustness for error transmission. Based on the Wireless Sensor Network, this paper analyzes the data distortion problem when transmitting H.264 coded video stream over error-prone channel. And the authors also have discussed a widely accepted technique that introduces more intra-coded information on macro block basis. Additionally, this paper introduces a simple loss and multiplication factor estimation method, the rate-distortion optimized assessing strategy over the whole situation. © (2013) Trans Tech Publications, Switzerland.
Hongling Y.,Foshan Polytechnic
Advanced Materials Research | Year: 2012
This article introduces the materials and structure characteristics of the freezer inner shell parts. On the basis of the design specification, it focuses on the analysis and design of components of the vacuum forming die-the vacuum holes, core-pulling mechanism, patrix ontology and so on. © (2012) Trans Tech Publications, Switzerland.
Chen W.B.,Foshan Polytechnic
Science and Technology of Welding and Joining | Year: 2016
The tungsten inert gas welding–brazing process using Al-based filler metal has been developed for joining 5052 Al alloy to Ti–6Al–4V alloy in a butt configuration. The results indicated that heat input influenced the morphology and thickness of the interfacial reaction layer of Al/Ti joints, which played an important role in the mechanical properties of weldment. With the optimised tungsten electrode offset D of 1.0 mm from Al/Ti initial interface to Al side and welding current of 70 A, the thin cellular-shaped and club-shaped TiAl3 reaction layers formed in the brazing zone, which contributed to suppressing crack initiation and propagation during tensile test. Eventually, the maximum tensile strength of 183 MPa was obtained and the optimised Al/Ti joint fractured at Al alloy base plate. Moreover, the power density characterisation and joining mechanism of Al/Ti joints were discussed. © 2016 Institute of Materials, Minerals and Mining