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ANSTO Publications Online

Welcome to the ANSTO Institutional Repository known as APO.

The APO database has been migrated to version 8.3. The functionality has changed, but the content remains the same.

ANSTO Publications Online is a digital repository for publications authored by ANSTO staff since 2007. The Repository also contains ANSTO Publications, such as Reports and Promotional Material. ANSTO publications prior to 2007 continue to be added progressively as they are in identified in the library. ANSTO authors can be identified under a single point of entry within the database. The citation is as it appears on the item, even with incorrect spelling, which is marked by (sic) or with additional notes in the description field.

If items are only held in hardcopy in the ANSTO Library collection notes are being added to the item to identify the Dewey Call number: as DDC followed by the number.

APO will be integrated with the Research Information System which is currently being implemented at ANSTO. The flow on effect will be permission to publish, which should allow pre-prints and post prints to be added where content is locked behind a paywall. To determine which version can be added to APO authors should check Sherpa Romeo. ANSTO research is increasingly being published in open access due mainly to the Council of Australian University Librarians read and publish agreements, and some direct publisher agreements with our organisation. In addition, open access items are also facilitated through collaboration and open access agreements with overseas authors such as Plan S.

ANSTO authors are encouraged to use a CC-BY licence when publishing open access. Statistics have been returned to the database and are now visible to users to show item usage and where this usage is coming from.

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Recent Submissions

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    Preparation of hydroxyapatite fibre composites by hot isostatic pressing
    (Australasian Ceramic Society, 1998) Ruys, AJ; Ehsani, N; Moricca, SA; Milthorpe, BK; Sorrell, CC
    Hot isostatic pressing (HIPing) has the potential to fully densify ceramics, provided that they are surface-sealed prior to HIPing. Surface sealing generally involves one of the following: presintering to a closed porosity density level; glass encapsulation (glass of appropriate consistency at the HIPing temperature); metal encapsulation (metal chemically compatible with the sample and suitably soft at the HIPing temperature). Hydroxyapatite fibre composites can not be presintered to a closed porosity density level owing to the additive-induced decomposition phenomenon. Glass encapsulation was shown to be problematic owing to severe HAp volatilisation catalysed by the reinforcement fibres at elevated temperatures. Therefore a specialised metal encapsulation process was developed, which enabled the production of fully dense fibre reinforced HAp, with no cracking on capsule removal. The result was near-fully dense, decomposition-free, fibre-reinforced HAp with a toughness comparable with cortical bone.
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    Crystalline hydrates in cement pastes
    (Australasian Ceramic Society, 1998-04) Aldridge, LP; Bertram, WK
    The calcium silicates in Portland cement hydrate at room temperature to form portlandite and amorphous calcium silica hydrate gel (C-S-H). However when Portland cement is hydrated at higher temperatures, between 50 and 100°C, crystalline calcium silicon hydrates such as atwillite and alpha di-calcium silicate hydrate start to form. This paper discusses the differences that could explain the formation of the amorphous C-S-H at room temperatures.
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    Melting and ceramic routes to Synroc
    (Australasian Ceramic Society, 1998) Stefanovsky, S; Vance, ER; Day, RA; Begg, BD
    Synroc formulations incorporating different simulated high-level wastes from reprocessing of spent nuclear fuel were melted at ~1400oC in a cold-crucible furnace. The samples were characterised and compared to equivalent materials made by the reference Synroc production method of subsolidus hot-pressing. The melted materials had essentially the same major phases, but much larger grain sizes. Minor phases were different, largely because of the different redox conditions prevailing in each case; whereas elements such as Mo, Fe and Ni exist as metals in the ceramic, they were present as ionic species in the melted materials.
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    Finite element modelling of creep and meutral axis migration in ceramic four point bend tests
    (Australasian Ceramic Society, 1998) Payten, WM; Law, M; Snowden, KU
    The modelling of creep behaviour of ceramics in high temperature applications (typically turbine blades or piston crowns) and the role of creep in densification processes is important in the further development of ceramics for extreme operating conditions. Four point flexural bend tests are generally used to investigate the high temperature creep behaviour of ceramics. Flexural creep tests offer several advantages over uniaxial tests, including lower cost of preparation, avoidance of sample misalignment problems and reduced sensitivity of strain to temperature fluctuation. The disadvantage is that the stress fields are statically indeterminate and thus results become difficult to interpret. The general assumption in continuum mechanics is the nonvariance of the neutral axis location, ceramics however exhibit different creep behaviours under tensile and compressive stresses which lead to the migration of the neutral axis. Thus the relaxed outer fibre stationary stresses alter and failure times become significantly longer than expected by an equivalent uniaxial test. Thus the results of flexural creep testing may be of Anegligible quantitative value@[1] in determining rupture life at high temperature. The use of reference or skeletal stresses [2][3] may however overcome many of the current inadequacies of flexure testing. To illustrate this, a nonlinear finite element analysis (FEA) of a four point bend test is used to compare with experimental and analytical results on Synroc C [4] a multiphase ceramic designed to immobilise the radioactive elements in high-level nuclear waste HLW. The reference stresses are then calculated and compared to results derived from the FEA analysis enabling the validity of the reference stress to be examined as it applies to Synroc.
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    Grain boundary diffusion of Cr in Co0
    (Australasian Ceramic Society, 1998) Bernasik, A; Janowski, J; Kowalski, K; Moya, EG; Nowotny, J
    The grain boundary diffusion coefficient and the bulk diffusion coefficient of 51Cr were determined from radiotracer diffusion profiles in polycrystalline CoO scales.