Sintering of waste of superalloy casting investment shells as a fine aggregate for refractory tiles |
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Authors: | F. Valenza R. Botter P. Cirillo F. Barberis M. di Foggia D. Sottile |
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Affiliation: | 1. IENI-CNR, U.T. Genova, via de Marini, 6, I-16149 Genoa, Italy;2. DICAT-Fac. of Engineering, Univ. of Genoa, P.le Kennedy 1 – Pad. D, I-16129 Genoa, Italy;3. Europea Microfusioni Aerospaziali – EMA, Zona Industriale ASI, 83040 Morra de Sanctis, AV, Italy |
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Abstract: | Powders obtained by milling ceramics shells, already used as investment material in casting processes, were sintered to investigate their possible re-use in the production of ceramic refractories. The sintering behaviour of these powders, consisting essentially of silica and mullite, were analysed both in a heating run by conventional contact dilatometry and in an isothermal process via optical dilatometry. The mechanical properties of sintered composites formed with a matrix of fine powders and an inert coarse phase of the same material are evaluated and discussed in view of possible use in the production of refractory tiles. |
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