https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:13979 Sat 24 Mar 2018 08:24:41 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 ]]>