caa a22 4500 463226941 CHVBK 20180405153230.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10853-006-0018-7 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0018-7 Effect of TiO2 addition on crystallization and machinability of potassium mica and fluorapatite glass ceramics [Elektronische Daten] [Ipek Akin, Gultekin Goller] In this study, the effect of TiO2 addition as a nucleating agent on the crystallization and machinability of potassium mica and fluorapatite base glass ceramics were investigated. Glass compositions were prepared and casted at predetermined temperatures. Differential thermal analysis and XRD methods were applied to characterize phase precipitation sequence and identification of phases. Disc and cylindrical shaped samples were prepared to determine microstructural and mechanical properties in terms of microhardness and machinability. FEG-SEM was used to characterize variation of microstructural constituents depending on the amount of nucleating agent. The results indicate that optimum microstructure and machinability can be obtained in machinable glass-ceramic by the addition of 1wt% TiO2 for the composition having 3:7 weight ratio of fluorapatite to potassium mica. Springer Science+Business Media, Inc., 2007 Akin Ipek Metallurgical and Materials Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey aut Goller Gultekin Metallurgical and Materials Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/3(2007-02-01), 883-888 0022-2461 42:3<883 2007 42 10853 https://doi.org/10.1007/s10853-006-0018-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0018-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Akin Ipek Metallurgical and Materials Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey aut NATIONALLICENCE 700 1- Goller Gultekin Metallurgical and Materials Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/3(2007-02-01), 883-888 0022-2461 42:3<883 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer