68 research outputs found
Understanding Careers: The Metaphors of Working Lives
No full textCareers and metaphors -- Careers as inheritances -- Careers as cycles -- Careers as action -- Careers as fit -- Careers as journeys -- Careers as roles -- Careers as relationships -- Careers as resources -- Careers as stories -- Careers in practice -- Career counselling and metaphor. "Understanding Careers: The Metaphors for Working Lives uses a unique framework of nine archetypal metaphors to encapsulate the field of career studies. Using an easy-to-read style, author Kerr Inkson examines key concepts, illustrating them with over 50 authentic career cases, to build a bridge between theory and "real life.""--BOOK JACKET.http://librarysearch.auckland.ac.nz/primo_library/libweb/action/display.do?fn=search&doc=uoa_voyager1665998&vid=UOA2_
Towards in-situ TEM for Li-ion battery research
No full textDue to recent developments in new battery materials for higher energy density applications there has been growing interest in new characterization techniques capable of time-resolved in situ/in operando analysis of dynamic Battery systems. This review provides an overview on recent development of liquid cell transmission electron microscopy (TEM) for Li-ion battery research and discusses the challenges, highlighting potential research areas. In-situ TEM offers the opportunity to study phenomena including solid electrolyte interphase (SEI) formation and phase changes during battery operation. There are two main challenging areas for in-situ TEM research (1) designing an in-situ TEM electrochemical cell that mimics a ‘real’ cell and (2) quantifying beam damage caused by electron irradiation of the electrolyte
Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for materials characterization
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Electron microscopy of dislocations and interfaces in Ti-Al intermetallic alloys
No full textSIGLEAvailable from British Library Document Supply Centre-DSC:D195714 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Failure mechanisms of diamond like carbon coatings characterised by in situ SEM scratch testing
No full textIn situ SEM scratch testing of DLC and Si-doped DLC deposited on Si wafers has been conducted using sharp 1 and 5 μm radii diamond asperities, enabling the stages of deformation and wear of DLC coatings to be evaluated in real time. With increasing load, initial plastic deformation and tensile cracking in the scratch track progresses to the propagation of radial and lateral cracks, and full coating spallation. In situ SEM imaging reveals nucleation of radial cracks in the DLC coating around the front and side of the moving asperity, followed by lateral crack propagation both ahead of, and behind, the asperity contact zone. Post-mortem FIB cross sectioning reveals microcracking and lateral cracks in the silicon substrate below DLC coatings prior to coating spallation. The DLC failure mechanisms are influenced by asperity geometry, with notable DLC coating lift up/delamination events occurring during the smaller 1 μm radius asperity scratch tests. The sharper 1 μm radius asperity required ∼20% of the applied load, and higher contact pressure, to initiate spallation during scratching compared the larger 5 μm asperity, indicating that smaller radii asperities are significantly more likely to cause DLC coating spallation, although the spallations they generate were observed to be, on average, smaller
Modification of graphene anode morphologies via wet and dry milling
No full textGraphene, an individual graphite monolayer, is being considered for use in lithium ion anodes as there is a technological drive to make batteries thinner, lighter and more flexible whilst maintaining or increasing cell capacity and cyclability. Due to its mono/few-layer platelet structure graphene may potentially be affected by mechanical processing routes. Here the effects that dry milling and wet milling have on graphene nanoplatelets and graphene anode solutions have been investigated. It was found that dry milling for 15 minutes causes graphene nanoplatelets to form agglomerated graphite, but that wet milling of graphene anode solution results in reduced porosity and smoother electrodes without visibly destroying the nanoplatelets
Complementary X-ray and neutron imaging of water electrolysers for green hydrogen production
No full textWith the growing interest in green hydrogen as an energy vector, advances in all types of electrolysers are urgently needed. Imaging methods utilising X-rays and neutrons are seen as highly complementary techniques for visualising, analysing and quantifying the properties of electrolysers, whose materials and operational processes span multiple length and timescales. In this perspective, we first outline four key challenge areas for all electrolyser technologies: using less, using alternative materials, increasing durability and recycling, and introduce the various materials (and their corresponding feature sizes and relevant imaging methods) found in the components of the four main electrolyser types anion exchange membrane (AEM), polymer electrolyte membrane (PEM), alkaline water electrolyser (AWE) and solid oxide electrolyser cell (SOEC). After introducing key relevant concepts for X-ray and neutron imaging, we present a detailed summary of the use of these techniques for the imaging of electrolyser technologies. As highlighted throughout the review, these two methods, when used in a complementary manner, are able to capture the full breadth of complex, multiscale, multiphase materials and dynamics that occur in electrolyser technologies. Finally, we give our perspective on the areas we foresee as being highly important for future complementary, multiscale studies of electrolyser materials. By harnessing the power of both imaging methods together, we can ensure the accelerated discovery and optimisation of the next generation of electrolyser technologies, ensuring a stable and reliable supply of green hydrogen in the coming decades and beyond
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