caa a22 4500 388019433 CHVBK 20180307124919.0 cr unu---uuuuu 161130e199812 xx s 000 0 eng 10.1557/JMR.1998.0466 doi S088429140004680X pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0466 The fabrication of near net-shaped spinel bodies by the oxidative transformation of Mg/Al2O3 precursors [Elektronische Daten] The feasibility of transforming shaped Mg-Al2O3-bearing precursors into monolithic spinel (MgAl2O4) bodies with a retention of shape and dimensions has been demonstrated.Dense, shaped precursors (disks, bars) were fabricated by the pressureless infiltration of molten Mg into porous Al2O3 preforms. After solidification (and machining, in the case of bar-shaped specimens), the Mg-bearing precursors were oxidized in flowing O2 (g) at 430-700 °C. Postoxidation annealing at 1200 °C resulted in the conversion of MgO and Al2O3 into MgAl2O4. After sintering at 1700 °C, spinel bodies that retained the precursor dimensions (to within 0.65%) were produced. Phase and microstructural analyses at various stages of processing are discussed. Copyright © Materials Research Society 1998 Kumar P. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 Sandhage K. H. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 Journal of Materials Research Cambridge University Press 13/12(1998-12), 3423-3435 0884-2914 13:12<3423 1998 13 JMR https://doi.org/10.1557/JMR.1998.0466 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0466 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kumar P. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 NATIONALLICENCE 700 1- Sandhage K. H. Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/12(1998-12), 3423-3435 0884-2914 13:12<3423 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge