Abstract
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 1 wt% TiO2 for the composition having 3:7 weight ratio of fluorapatite to potassium mica.
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References
Jordery S, Lee W, James PF (1998) J Am Ceram Soc 81:2237
Shyu JJ, Wu JM (1991) J Mater Sci Lett 10:1056
Chen X, Hench LL, Greenspan D, Zhong J, Zhang X (1998) Ceramics Int 24:401
Rounan L, Peinan Z (1986) J Non-Cryst Solids 80:600
Elbatal HA, Azooz MA, Khalil EMA, Monem AS, Hamdy YM (2003) Mater Chem Phys 80:599
Baik DS, No KS, Chun JS (1995) J Am Ceram Soc 78(5):1217
McMillan PW (1979) Glass-ceramics, 2nd edn. Academic Press, London, New York, San Francisco
Vogel W, Höland W, Naumann K, Gummel J (1986) J Non-Cryst Solids 80:34
Rawson H (1980) Properties and applications of glass, 1st edn. Elsevier, Amsterdam, Oxford, New York
Taruta S, Mukoyama K, Suzuki SS, Kitajima K, Takusagawa N (2001) J Non-Cryst Solids 296:201
Wei M, Zhang Y, Sun X, Zhou L, Wang K (2003) Key Eng Mater 240–242:241
Davis JB, Marshall DB, Housley RM, Morgan PE (1998) J Am Ceram Soc 81:2169
Vogel V (1994) Glass chemistry. Springer-Verlag, Berlin
Lo CL, Duh JG, Chiou BS, Lee WH (2002) Mater Res Bull 37:1979
Taruta S, Watanabe K, Kitajima K, Takusagawa N (2003) J Non-Cryst Solids 321:96
Sung YM, Lee JS, Shin KC (2000) J Mater Sci Lett 19:675
Acknowledgements
The authors would like to thank the State Planning Organization of Turkey for the support to this study and Huseyin Sezer due to his contribution for scanning electron microscopy investigations.
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Akin, I., Goller, G. Effect of TiO2 addition on crystallization and machinability of potassium mica and fluorapatite glass ceramics. J Mater Sci 42, 883–888 (2007). https://doi.org/10.1007/s10853-006-0018-7
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DOI: https://doi.org/10.1007/s10853-006-0018-7