Browsing by Author "Smart, RStC"

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    Minerals, ceramics, and glasses.
    (CRC Press, 2009-06-24) Smart, RStC; Zhang, Z
    The surfaces of minerals and ceramics have many features in common. This statement can be justi- ed by comparison of the nature of the information required from their respective surface analyses [1-3]. Indeed, tailored ceramics often result from judicious design involving combinations of mineral structures [4,5]. Similarities in phase structure and composition, surface structure and surface sites, microstructure, and surface reactivity have been demonstrated in numerous studies. Surface reactions involving oxidation, leaching, dissolution, weathering, precipitation, and phase transformation, are now well documented. Surface modi cation of minerals as a result of adsorption, reaction, processing (e.g., plasma spraying), and surface coatings (e.g., sol-gel deposition), has been found to be equally applicable to ceramic materials. Hence the methodologies for determining the surface properties that control the mechanisms of reaction and transformation of surfaces of minerals and ceramics will in general require similar surface analytical techniques. © 2020 Informa UK Limited
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    A report to NERDDP on project no. 1319 entitled : description of synroc durability: kinetics and mechanisms of reaction
    (Australian Nuclear Science and Technology Organisation, 1990-08) Jostsons, A; Smith, KL; Blackford, MG; Hart, KP; Lumpkin, GR; McGlinn, PJ; Myhra, S; Netting, A; Pham, DK; Smart, RStC; Turner, PS
    This is the technical report to NERDDP on Project 1313, "Description of Synroc Durability: Kinetics and Mechanisms of Reaction". Many physical and chemical processes occur, slightly and concurrently, when Synroc is exposed to leachants. A few of these include: * ion-exchange between Synroc and the leachant; * dissolution of some primary phases; * formation of colloids; * precipitation of secondary phases. All of these processes (and others) affect the durability of Synroc. Consequently, it has been necessary to apply an armoury of techniques, to unravel the various processes and their effects. Techniques used include: * solution analysis by inductivity coupled plasma mass spectrometry (ICP/MS) and inductivity coupled plasma optional emission spectroscopy (ICP/OES); * scanning and analytical transmissions electron microscopy (SEM and AEM respectively); * X-ray photoelectron spectroscopy (XPS) and Auger spectroscopy. We have matched or exceeded all the sub-objectives agreed to and funded by NERDDP in 1989/90. Furthermore we have begun to integrate the information generated under the auspices of the grant as well as information subsequently collected, into a comprehensive model. The information contained within the bulk of this report can be broken down into areas which relate to the sub-objectives of the project.