https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:56210 Wed 14 Aug 2024 09:34:41 AEST ]]> 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: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:39087 2AlB₂, using a combination of experimental characterization and first-principles calculations. We find that Fe₂,AlB₂ is more tolerant to radiation-induced amorphization than MoAlB, both at 150 ℃ and at 300 ℃. The results can be explained by the fact that the Mo Frenkel pair is unstable in MoAlB and as a result, irradiated MoAlB is expected to have a significant concentration of Mo_Al antisites, which are difficult to anneal even at 300 ℃. We find that the tolerance to radiation-induced amorphization of MAB phases is lower than in MAX phases, but it is comparable to that of SiC. However, MAB phases do not show radiation-induced cracking which is observed in MAX phases under the same irradiation conditions. This study suggests that MAB phases might be a promising class of materials for applications that involve radiation.]]> Tue 14 May 2024 09:12:30 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:46799 Mon 29 Jan 2024 18:41:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50465 Mon 29 Jan 2024 18:27:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44825 Mon 24 Oct 2022 09:52:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53915 Mon 22 Jan 2024 16:13:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48507 4C₃ which would diminish the amount of Al available to act as a PCM. This work presents the effects of extended thermal cycling over the intended use range to test its effect on integrity, phase composition and microstructure of the two candidate materials. A small initial mass loss from the 5 g samples due to the loss of metal particles directly in contact with the surface was observed and which had stabilised after 50–100 cycles. The mass loss is accompanied by a small thermal capacity loss in DTA which also stabilised in the first 50–100 cycles. Both the mass loss and capacity reduction are expected to be greatly reduced in full scale storage modules due to the much smaller surface area to volume ratio (∼0.1) compared with that for the samples used here (∼4). The absence of X-ray diffraction peaks from the carbide Al₄C₃ in data from the cycled materials and their continued strong latent heat DTA signal strongly suggest that the materials are suitable for long-term use in thermal energy storage applications.]]> Mon 20 Mar 2023 16:11:23 AEDT ]]> 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:56181 Mon 12 Aug 2024 10:13:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37255 cat.⁻¹, Faradaic efficiency: 30.1%) at the low overpotential, and to display a high chemical stability and sustained catalytic performance. In conjunction, further mechanism studies indicate B and Al as main-group metals show a highly selective affinity to N₂ due to the strong interaction between the B 2p/Al 3p band and the N 2p orbitals, while Mo exhibits specific catalytic activity toward the subsequent reduction reaction. Overall, the MAB-phase catalyst under the synergy of the elements within ternary compound can suppress the hydrogen evolution reaction and achieve enhanced NRR performance. The significance of this work is to provide a promising candidate in the future synthesis of ammonia.]]> Fri 23 Aug 2024 09:01:12 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39705 Fri 17 Jun 2022 16:56:04 AEST ]]>