https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46021 2AlC purity. Aside from a thin oxide layer on the coating surface, a pure Ti₂AlC layer was formed immediately below. In total, the coatings were found to exist as seven microstructurally unique sub-layers due to equilibration of supersaturated phases formed during the laser cladding process. No delamination between any layers was observed. The phase identification and microstructure, as determined using XRD, SEM and EDS, are described in detail. Some unique microstructures were observed, including dendritic Ti₂AlC MAX phase grains produced from a topochemical reaction between TiC_x and Ti_yAl_z regions, and α-Ti supersaturated with up to 33 at.% C. The kinetically trapped phases produced within the coating using this process may offer a strong combination of material properties which could be advantageous for use in extreme environments.]]> Wed 09 Nov 2022 15:31:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54534 Tue 27 Feb 2024 20:42:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54530 Tue 27 Feb 2024 19:43:48 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54431 Tue 27 Feb 2024 13:58:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47768 Tue 05 Dec 2023 09:03:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35304 Thu 11 Jul 2019 16:16:19 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39269 Thu 02 Jun 2022 14:37:31 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17271 Sat 24 Mar 2018 08:01:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26124 n+1AX_n phases to systems where the element 'A' is not the reducing agent was investigated in systems TiO₂-A-Al-C for A=Al, Si, Ga, Ge, In and Sn as well as Cr₂O₃-Ga-Al-C. MAX phase-Al2O3 composites were made in all systems except those with A=Ga or In. The effectiveness of conversion to MAX phases was generally in the range 63-96% without optimisation of starting ratios. Optimisation in the Ti-Si-C system gave a MAX phase component with >98% Ti₃SiC₂.]]> Sat 24 Mar 2018 07:41:07 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47660 2, readily attaining surface temperatures of 520–530 °C, well above the phase change temperature of 420 °C. Single step charging led to a state of charge of 80% without exceeding a nominal surface temperature of 530 °C. Cycling on and off sun in the range 460–520 °C was used to achieve a state of 99% charged. Thermal performance of the MGA during solar charging and its discharge by natural cooling is presented and analysed.]]> Mon 29 Jan 2024 17:43:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30437 x WO₃, where 0  ≤  x  ≤  1, and M is a dopant ion, most commonly an alkali metal. In this work, the sodium tungsten bronzes (Na_x WO₃) are investigated as materials for plasmonic applications. The bronzes were fabricated with a solid state reaction, the dielectric function calculated using density functional theory (DFT) and the nanoparticle responses calculated with the boundary element method (BEM). The results were compared to Au and Ag, the materials most widely used in plasmonic applications. It was shown that for x  >  0.5, the solid state fabrication method produces cube-shaped particles of diameter  ≥1 µm, whose bulk optical properties are well described by a free-electron model and a rigid band structure. The addition of Na into the lattice increases the free electron density, increasing the bulk plasma frequency. Nanoparticle plasmon resonances are found to be highly tunable, and generally at a lower frequency than Au or Ag, and so sodium tungsten bronzes are predicted to be well suited to biomedical or chemical sensing applications.]]> Mon 23 Sep 2019 12:42:27 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32781 Mon 23 Sep 2019 10:08:24 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40763 Mon 18 Jul 2022 14:01:39 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39094 Mon 09 May 2022 12:18:33 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39095 Mon 09 May 2022 12:18:30 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45838 Mon 07 Nov 2022 13:56:03 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45837 Mon 07 Nov 2022 13:49:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46880 Mon 05 Dec 2022 14:06:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47657 Fri 27 Jan 2023 13:53:07 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47700 Fri 27 Jan 2023 13:47:35 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39705 Fri 17 Jun 2022 16:56:04 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43003 Fri 09 Sep 2022 14:10:35 AEST ]]>