https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3334 Wed 11 Apr 2018 17:07:46 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3303 Wed 11 Apr 2018 12:57:43 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3011 Wed 11 Apr 2018 12:15:20 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41642 Wed 10 Aug 2022 08:43:25 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32465 Wed 06 Jun 2018 14:04:16 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1832 Sat 24 Mar 2018 11:12:09 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:9721 Sat 24 Mar 2018 08:42:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:2900 Sat 24 Mar 2018 08:33:01 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1697 Sat 24 Mar 2018 08:27:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1698 Sat 24 Mar 2018 08:27:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:2445 Sat 24 Mar 2018 08:26:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:15382 Sat 24 Mar 2018 08:18:55 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19030 3SiC₂ irradiated by 700 keV C ions has been investigated over a range of fluences and sample temperatures. The samples were analysed using a series of experimental techniques, including glancing-incidence X-ray diffraction, Rutherford backscattering spectrometry, Raman spectroscopy and scanning electron microscopy. This material exhibits a high level of tolerance to damage, especially at high temperature. Irradiation at temperatures from room temperature to 270 °C results in decomposition to TiC; however, this is not observed at temperatures above 270 °C. A minimum in the observed damage level is evident for irradiation at a sample temperature of 350 °C. At higher temperatures the damage level increases, and results in material which is made up of damaged Tii₃SiC₂.]]> Sat 24 Mar 2018 08:05:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17453 Sat 24 Mar 2018 08:04:14 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21466 Sat 24 Mar 2018 07:52:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5190 Sat 24 Mar 2018 07:47:47 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5241 Sat 24 Mar 2018 07:44:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25638 Sat 24 Mar 2018 07:28:10 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26465 Sat 24 Mar 2018 07:27:16 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26983 15 ions cm⁻². The evolution of microstructure and induced defects of the irradiated sample with different doses was surveyed by combining grazing incident X-ray diffraction (GIXRD) using synchrotron radiation and variable energy positron beam analysis (PBA). With increasing irradiation dose, the crystallinity degrades gradually and leads to a combination of damaged Ti₃SiC₂ in combination with the precipitation of a TiCₓ phase. For high dose irradiation, a nano-dispersed TiCₓ phase becomes the dominant component. The PBA measurements indicate the formation of a new large vacancy-type defect that could be a cluster or void. The combination of GIXRD and PBA demonstrates that the damage of the MAX phase is more serious in the first 10 nm surface layer than that in the deeper layers closer to the final resting position of the projectile in the solid. The possible damage mechanisms have been discussed.]]> Sat 24 Mar 2018 07:26:59 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3829 Sat 24 Mar 2018 07:22:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3413 Sat 24 Mar 2018 07:21:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3419 Sat 24 Mar 2018 07:21:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3332 Sat 24 Mar 2018 07:18:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25135 Sat 24 Mar 2018 07:17:12 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:22092 0.67. It was found that a TiC nanocrystalline phase was formed under the high dose irradiation. However, a complete decomposition by irradiation did not take place even at 10.3 dpa. Post irradiation annealing to temperatures of 500–800 °C results in crystal regrowth of Ti₃SiC₂ and TiC phases.]]> Sat 24 Mar 2018 07:15:15 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48689 Mon 27 Mar 2023 16:03:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46106 2AlC MAX phase thin films prepared by radio-frequency magnetron sputtering were irradiated at room temperature by 100 keV helium ions to a fluence of 1 × 10¹⁷ ions cm⁻². The effects of thermal annealing on the structural and mechanical properties of the helium-irradiated Cr₂AlC films as well as the helium release were investigated by grazing-incidence X-ray diffraction (GIXRD), Raman spectroscopy, and scanning electron microscope (SEM) in combination with nano-indentation and elastic recoil detection (ERD) analysis. The irradiation-induced structural damage in the Cr₂AlC is significantly recovered by thermal annealing at temperatures around 600℃, attributed to high defect diffusivity. After annealing to 750℃, the hardness of irradiated films recovered almost completely, which is ascribes to both defect recombination and reformation of damaged chemical bonds. Substantial helium release occurring at this annealing temperature is closely related to the damage recovery due to helium irradiation.]]> Fri 11 Nov 2022 12:05:10 AEDT ]]>