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Full-Text Articles in Engineering
Effect Of Mg/B Ratio On The Superconductivity Of Mgb2 Bulk With Sic Addition, Yun Zhang, S X. Dou, Cheng Lu, Sihai Zhou, Wenxian Li
Effect Of Mg/B Ratio On The Superconductivity Of Mgb2 Bulk With Sic Addition, Yun Zhang, S X. Dou, Cheng Lu, Sihai Zhou, Wenxian Li
Faculty of Engineering - Papers (Archive)
To improve the self-field critical current density (Jc) and critical temperature (Tc) in SiC-doped MgB2, optimization of the nominal Mg/B mixing ratio has been performed. The effects of the nominal Mg/B mixing ratio (x:2) on the superconductivity, Raman spectra, current transport properties, and flux pinning mechanisms in MgB2 with 10 wt.% SiC doping were investigated systematically, with x varied from 1 to 1.2. It has been found that the sample with the Mg/B ratio of 1.15:2 exhibited the best Jc performance for all fields (0–8.5 T), and its Tc was also …
Temperature Effect On Microstructure And Electromagnetic Performance Of Polycarbosilane And Sugar-Doped Mgb2 Wires, Andrey V. Shcherbakov, Josip Horvat, Olga V. Shcherbakova, Nikolina Novosel, Emil Babic, S. X. Dou
Temperature Effect On Microstructure And Electromagnetic Performance Of Polycarbosilane And Sugar-Doped Mgb2 Wires, Andrey V. Shcherbakov, Josip Horvat, Olga V. Shcherbakova, Nikolina Novosel, Emil Babic, S. X. Dou
Faculty of Engineering - Papers (Archive)
The effect of processing temperature on structural and superconducting properties of 10 wt.% sugar- and 10 wt.% PCS-doped MgB2 wires is systematically investigated. It is demonstrated that these dopants significantly enhance the electromagnetic performance of Fe-clad MgB2 superconductor and increase its potential for practical application. The enhancement of in-field critical current density (Jc(Ba)) and upper critical field (Bc2) is due to formation of a large amount of lattice defects caused by impurities and C substitution into the MgB2 crystal lattice. High temperature sintering of sugar-doped sample results …
Effect Of Bulk Temperature On The Tribological Performance Of Aqueous Symmetric Tri-Block Copolymers (Ppo-Peo-Ppo And Peo-Ppo-Peo) Based Lubricant, Oyong Novareza, P B. Kosasih, A K. Tieu, Hongtao Zhu
Effect Of Bulk Temperature On The Tribological Performance Of Aqueous Symmetric Tri-Block Copolymers (Ppo-Peo-Ppo And Peo-Ppo-Peo) Based Lubricant, Oyong Novareza, P B. Kosasih, A K. Tieu, Hongtao Zhu
Faculty of Engineering - Papers (Archive)
This work investigates the effect of bulk temperature and the tribological performance of a number of symmetric triblock copolymers on MSI020 commonly in metal forming. It is to determine the best bulk temperature for the lubricants in order to apply in metal fOlming application. The triblock polymers are temperature dependant'. The polymers can be compeletly dissolved in solution since of hydrogen bonding in certain temperature. As temperature increases, the bond is weakend and the polymer break from the water and form dispersion in the water
Self-Doping Effect And Successive Magnetic Transitions In Superconducting Sr2 Vfeaso3, Guanghan Cao, Zhifeng Ma, Cao Wang, Yunlei Sun, Jinke Bao, Shuai Jiang, Yi Luo, Chunmu Feng, Yi Zhou, Zhi Xie, Fengchun Hu, Shiqiang Wei, I Nowik, I Felner, Lei Zhang, Zhu-An Xu, Fu-Chun Zhang
Self-Doping Effect And Successive Magnetic Transitions In Superconducting Sr2 Vfeaso3, Guanghan Cao, Zhifeng Ma, Cao Wang, Yunlei Sun, Jinke Bao, Shuai Jiang, Yi Luo, Chunmu Feng, Yi Zhou, Zhi Xie, Fengchun Hu, Shiqiang Wei, I Nowik, I Felner, Lei Zhang, Zhu-An Xu, Fu-Chun Zhang
Faculty of Engineering - Papers (Archive)
We have studied a quinary Fe-based superconductor Sr2VFeAsO3 by the measurements of x-ray diffraction, x-ray absorption, Mössbauer spectrum, resistivity, magnetization, and specific heat. This apparently undoped oxyarsenide is shown to be self-doped via electron transfer from the V3+ ions. We observed successive magnetic transitions within the VO2 layers: an antiferromagnetic transition at 150 K followed by a weak ferromagnetic transition at 55 K. The spin orderings within the VO2 planes are discussed based on mixed valence of V3+ and V4+.
Effect Of Microstructural Morphology On The Mechanical Properties Of Titanium Alloys, A Dehghan-Manshadi, Mark H. Reid, R J. Dippenaar
Effect Of Microstructural Morphology On The Mechanical Properties Of Titanium Alloys, A Dehghan-Manshadi, Mark H. Reid, R J. Dippenaar
Faculty of Engineering - Papers (Archive)
Different morphologies of α+β microstructures were obtained in a commercial Ti-6Al-4V alloy by cooling at different rates from the single β-phase region into the two phase region. The effect of such morphologies on mechanical properties was studied using hot compression tests in a Gleeble thermomechanical simulator. A variety of complex morphologies could be obtained since the cooling rate has a significant influence on the β to α phase transformation and the resulting morphological development. While most of the β phase transformed to colonies of α at high cooling rates, it was possible to obtain a complex mixture of a colonies, …
A Study Of The Continous Cooling Behaviour And Effect Of Preheat And Interpass Temperature On The Haz Of High Strength Quenched And Tempered Steel, Lenka Kuzmikova, Mark Callaghan, Nathan Larkin, Robert Scott, Robert De Jong, Huijun Li, John Norrish
A Study Of The Continous Cooling Behaviour And Effect Of Preheat And Interpass Temperature On The Haz Of High Strength Quenched And Tempered Steel, Lenka Kuzmikova, Mark Callaghan, Nathan Larkin, Robert Scott, Robert De Jong, Huijun Li, John Norrish
Faculty of Engineering - Papers (Archive)
In this study, the continuous cooling phase transformation behaviour of a quenched and tempered armour steel was investigated. A continuous cooling transformation diagram was constructed providing valuable information for predicting microstructural evolution and mechanical properties at different cooling rates during actual welding fabrication. Welding trials were carried out utilising flux-cored arc welding technique in combination with an austenitic stainless steel consumable. The effect of various preheat and interpass temperatures on cooling rate and consequently on the heat affected zone microstructure and mechanical properties of multipass welds were investigated.
Buoyancy-Driven Flows In Pipelines - Effect On Hydrostatic Test Measurements, Ajit Godbole, Paul Cooper, Phillip Venton, John Hough
Buoyancy-Driven Flows In Pipelines - Effect On Hydrostatic Test Measurements, Ajit Godbole, Paul Cooper, Phillip Venton, John Hough
Faculty of Engineering - Papers (Archive)
No abstract provided.
The Effect Of Non-Linear Mooring Stiffness On The Vortex-Induced Motion Of Cylindrical Structures, Brad Stappenbelt
The Effect Of Non-Linear Mooring Stiffness On The Vortex-Induced Motion Of Cylindrical Structures, Brad Stappenbelt
Faculty of Engineering - Papers (Archive)
Mooring systems employed for floating structures commonly result in non-linear load-excursion characteristics. The non-linear stiffness and the subsequent amplitude-dependent natural frequency influence the vortex-induced motion of the structure. The application of linear stiffness vortex-induced motion modelling and experimental data has been shown to produce significant uncertainties regarding the onset and vortex-induced response prediction of catenary moored cylindrical structures (Bjarke et al. 2003; Dijk et al. 2003). In the present study, the two-degree of freedom vortex-induced motion of non-linearly compliant elastically mounted rigid cylinders was experimentally investigated. Specifically, third-order polynomial hard-spring stiffness, typical of catenary moorings was considered. The linear and …
Effect Of Nano-Sized Particles On Bond Strength In Accumulative Roll Bonding, Lihong Su, Cheng Lu, Tim Mcneice, A K. Tieu
Effect Of Nano-Sized Particles On Bond Strength In Accumulative Roll Bonding, Lihong Su, Cheng Lu, Tim Mcneice, A K. Tieu
Faculty of Engineering - Papers (Archive)
Effect of nano-particles on bond strength of aluminium alloy 5050 produced by ARB was investigated. Experimental results indicated that nano-particles can significantly enhance the bond strength of aluminium alloys. Several kinds of nanoparticles with different particle size were compared. The hardness of the particles and the particle size are the two factors that decide the strengthening effect.The results showed that 50 nm Al2O3 particles have the best strengthening effect.