https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:4516 Wed 11 Apr 2018 10:39:03 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:7712 Sat 24 Mar 2018 08:41:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:11449 n+1AX_n Phase materials. D20 has enabled us to explore the ultra-fast reaction kinetics of a Self-propagating High-temperature Synthesis (SHS) of model M_n+1AX_n Phase systems at a <900 ms time resolution. In turn, this technique has been further refined and applied in the confirmation of a novel solid state M_n+1AX_n Phase precursor design. The ability to simultaneously explore the in situ chemical and thermal environments of large volume samples has provided us with a means of rapidly prototyping novel synthesis techniques. By way of example, the successful application of solid state precursors has reduced the M_n+1AX_n Phase synthesis times and temperatures by approximately 50 and 44%, respectively. The development and application times for these precursors could not have been achieved without application of these diffractometers’ capabilities. More generally, time-resolved in-situ neutron diffraction has the potential to redefine many research techniques in both materials science and solid state physics if two experimental methodologies can be perfected: (1) concurrent experimentation and (2) complementary analysis. More specifically, we should aim to couple in situ neutron scattering with the simultaneous analysis of chemical, thermal, physical or environmental factors, while analysis using complementary techniques (e.g. neutrons and X-rays) will ideally produce higher scientific standards in characterisation. Together, these methodologies will significantly reduce the development time and complexity of novel materials syntheses, while ultimately lowering associated costs. The key to achieving these goals is the design and implementation of robust in situ sample environments capable of exploring a wide range of synthesis and simulated service environments. In conclusion, the designs and commissioning of equipment intended for these aims will also be discussed.]]> Sat 24 Mar 2018 08:14:38 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:12011 3AlC₂ has an interesting combination of electrical, thermal and mechanical properties. Single crystal elastic constants under the Reuss approximation for the micromechanical state were obtained by analysing the shifts of neutron diffraction peaks while a polycrystalline sample was subjected to a compressive load varying from 5 to 300 MPa. The values of Young’s modulus and Poisson’s ratio computed from the single crystal compliances are in good agreement with those obtained directly from strain gauges and from the average changes in the a and c unit cell parameters.]]> Sat 24 Mar 2018 08:11:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:10719 Sat 24 Mar 2018 08:09:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3434 100 K/s. Despite the existence of four other titanium silicides (TiSi₂, TiSi, Ti₅Si₄, Ti₃Si) evidence of these or other intermediate phases was not found in either the pre-heating or reaction stages of the process. The reaction is, however, narrowly preceded by the α→β transformation in Ti, which initiates interdiffusion and acts as a trigger for SHS ignition. The formation of Ti₅Si₃ appears to occur by the direct solid state reaction of β-Ti and Si.]]> Sat 24 Mar 2018 07:20:26 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3435 Sat 24 Mar 2018 07:20:25 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:23205 Sat 24 Mar 2018 07:10:28 AEDT ]]>