Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Thermal Shock Resistance of $Al_2$TiO$_5$ Ceramics Prepared from Electrofused Powders

전기용융 분말로부터 합성된 $Al_2$TiO$_5$ Ceramics의 열충격 저항성

  • 김익진 (무기재료공정 및 응용연구소, 한서대학교 재료공학과) ;
  • Published : 1998.10.01
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Abstract

The thermal instability of Al2TiO5 Ceramics was contrlled by solid solution with MgO SiO2 and ZrO2 through electrofusion in an arc furnace. The thermal expansion properties of Al2TiO5 composites show the hysteresis due to the strong anisotropy of The crystal axes of these material. These phenomena are ex-plained by the opening and closing of microcracks. The difference in microcracking temperatures e.g 587.6(ATG2), 405.9(ATG3) and 519.7$^{\circ}C$(ATG4) is caused by the difference in grain size and stabilizer type. The thermal shock behaviour under cyclic conditions between 750-1400-75$0^{\circ}C$ show no change in mi-crostructure and phase assemblage for all three stabilized specimens. After the thermal loading test at 110$0^{\circ}C$ for 100hrs. ATG1 and ATG2 materials decomposes completely to its components corundum and ru-tile in both cases. However with approximatelly 20% retention of the Al2TiO5 Thus in order to prevent decomposition of the stabilized material in the critical temperature range 800-130$0^{\circ}C$ it must be traversed within a short period of time.

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References

  1. Keram. Zeitschrift v.36 no.9 Keramische Konstruktionswerkstoffe fur den Motorenbau E. Gugel
  2. Keramische Hochleistungsbauteile fur den Motoren und Triebwerkbau Keramische Isolationsbauteile fur Motoren W. D. Grunde
  3. Acta Cryst. v.B28 no.1040 Structure Studies on $Al_2O_5$ at Room Temperature and At 600℃ Morosin;R.W. Lynch
  4. J. Am. Ceram. Soc. v.63 Decomposition Kinetics of $Al_2O_5$ in Powdered State E. Kato;K. Daimon;I. Takahashi
  5. Br. Ceram. Trans. J. v.88 no.144 Aluminium Titanate-A Literature Review, Part 1 : Microcracking Phenomena H.A.J. Thomas;R. Sterens
  6. Gieβerei v.64 Keramische Werkstoffe fur das Gicβcn und Schmelzen Von Aluminium und Aluminiumlegierungen H. Nink;H. Keller;A. Krauth
  7. Sprechsaal v.115 no.12 Neue Keramische Werkstoffe mit hoher Ther Moschockbestandigkeit fur die Chemische Industric W. Rieger;Thayngen
  8. Sprechsaal v.118 no.12 Verbesserung von Aluminiumtitanat-Keramik Ch. Han;D. Selb
  9. The 11th Korea-Japan Seminar on New Ceramics Thermal Stability of Aluminium Titanate(Al₂TiO5) Solid Solutions I.J. Kim;Y.S. Ko
  10. Therdas Datenbank O. Kubaschewski
  11. Thermochemical Properties of Inorganic Substances O. Knacke;O. Kubaschewski;K. Hasselmann
  12. Techn. University Aachen Anwendung des Sol-Gel-Verfahrens auf die Herstellung Keramischer Werkstoffe aus Aluminiumtitanat-Mullit, Dissertation, Institut fur Gesteinshiitten-kunde I.J. Kim
  13. Ceram. Age. v.60 no.5 Thermal Expansion Hysteresis of Aluminium Titanate W. R. Buessem;N. R. Thielke;R. V. Sarakauskas
  14. J. of. Am. Ceram. Soc. v.56 no.8 Influence of Grain Size on Effects of Thermal Expansion Anisotropy in $MgT_2iO_5$ J. A. Kuszyk;R. C. Bradt
  15. J. fess. Common. Met. v.24 no.2 Thermal Expansion Characteristics and Stability of Pseudo-brookietype Compounds G. Bayer
  16. Korean Journal of Materials Research v.4 no.2 Aluminium Ti-tanate-Mullite Composites: Part 2. Thermal Shock Resistance I. J. Kim;W. H. Kang;Y. S. Ko
  17. Mechanisches Verhalten keramischer Werkstoffe, Werkstoff-Forschung und technik D. Munz;T. Fett;B. Iischer(ed.)
  18. Dissertation Eigenschaften, Korrosionsverhalten und Mogliche Anwendungen Von Geschmolzenem Aluminium-titanat W. Staudt
  19. Technische Keramik Einsatz Keramischer Werstoffe im Motorenbau Teil 1, 2 U. Dworak
  20. Cfi/Berichte DKG 617-87 Keramik im Motorenbau G. Schuseil