Authors: Cannillo, V.¹; Palmero, P.²; Manfredini, T.³; Montanaro, L.¹

Source: International Journal of Materials and Product Technology, Volume 35, Numbers 3-4, 23 May 2009 , pp. 392-406(15)

Publisher: Inderscience Publishers

Abstract:

Al<SUB align=right>2O<SUB align=right>3&#47;YAG composite powders have been synthesised by reverse strike precipitation. The powders were characterised by DTA&#47;TG simultaneous analysis; the phase evolution was studied by XRD analysis, while the crystallite formation and growth were followed by TEM observations. A fully dense, homogenous material was obtained by sintering 900&#176;C pre-treated powders at 1600&#176;C for 3 h. For limiting grain growth, both a doping with 500 ppm MgO followed by a free sintering and a fast sintering procedure involving a high heating rate (50&#176;C&#47;min) were performed. The sintered bodies were then characterised by SEM observation and Vickers indentation. Moreover, a numerical model was employed in order to estimate the mechanical properties of the composite materials starting from their microstructural features and from the single constituent phase properties.

Keywords: TECHNICAL JOURNALS; Design and Product Development; Materials and Manufacturing

Document Type: Research article

DOI: http://dx.doi.org/10.1504/IJMPT.2009.025689

Affiliations: 1: Dipartimento di Ingegneria dei Materiali e dell 2: Ambiente, University of Modena and Reggio Emilia, via Vignolese 905, 41100 Modena, Italy. 3: Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, UdR PoliTO - INSTM, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy.

Publication date: 2009-05-23

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