TY - CONF A1 - Sojref, Regine A1 - Güther, Wolfgang T1 - Solvent-based redispersion of fine (<200 nm) corundum powder pre-milled in water T2 - ECerS XII - 12th Conference of the European ceramic society CY - Stockholm, Sweden DA - 2011-06-19 KW - Powder processing KW - Redispersion KW - Tape casting KW - Corundum KW - Hydrophobization PY - 2011 SP - 1 EP - 4 AN - OPUS4-25379 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nofz, Marianne A1 - Dörfel, Ilona A1 - Sojref, Regine T1 - Microstructure of sol-gel derived corundum containing coatings N2 - Up to ~ 3 µm thick alumina coatings on corundum ceramic, soda–lime–silica glass and Inconel718™ were produced from mixtures of boehmite sols and corundum suspensions. Transmission electron micrographs in combination with electron diffraction and energy dispersive X-ray spectroscopy served to identify crystallographic phases and to characterize the microstructure of the coatings. Using corundum ceramic as substrate the initially deposited boehmite transforms via transition aluminas to corundum while heating to 1200 °C. In the cases of glass and Inconel718™ thermal treatments up to 520 °C and 1100 °C, respectively, cause diffusion of ions from the substrates into the coatings. Thus additional oxide phases were formed. All coatings are free of cracks or delaminations and do not show any directed crystal growth. KW - Aluminium oxide KW - Coatings KW - Ceramics KW - Transmission electron microscopy KW - TEM KW - Sol-gel KW - Corundum KW - Alumina PY - 2007 SN - 0040-6090 VL - 515 IS - 18 SP - 7145 EP - 7154 PB - Elsevier CY - Amsterdam AN - OPUS4-15016 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -