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Yönlü Katılaştırılmış MgAl2 O4 -Y3 Al5 O12 Ötektik Seramik Malzemelerin Gaz Türbin Şartlarındaki Kimyasal Dayanımının İncelenmesi

Year 2018, Volume: 8 Issue: 1, 260 - 263, 01.01.2018

Abstract

Özellikle havacılık uygulamalarında kullanılan gaz türbin motorlarındaki nozul, bıçak ve ısı kalkanı gibi parçalarda Nikel esaslı alaşımlar kullanılmaktadır. Fakat bu alaşımların dayanım sıcaklıkları uygulamaları sınırlandırmakta, enerji maliyetini artırarak çevre kirliliğine neden olmaktadır. Ergitilerek büyütülen yönlü katılaştırılmış ötektik oksit seramikler ise bu olumsuzlukları bertaraf etmektedir. Bu çalışmada da yönlü katılaştırılmış MgAl2O4-Y3Al5O12 MAS-YAG seramiklerinin üretimi ve sıcak korozyon dirençlerinin, sinterlenerek üretilmiş magnezyum alüminat spinel MAS -itriyum alüminyum garnet YAG kompoziti ile karşılaştırılması ele alınmıştır. Bu amaçla sinter ve ötektik malzemelerin hacim, ağırlık ve mikroyapı SEM değişimleri gözlenmiştir. Oda sıcaklığı ve korozif 1600°C’lik gaz türbin şartlarında sinterlenmiş ve ötektik MAS-YAG malzemelerin eğilme mukavemeti davranışları incelenmiştir. Yönlü katılaştırılmış MAS-YAG yapının korozyon davranışları aynı kompozisyondaki konvansiyonel sinter seramikten daha iyidir

References

  • Abalı, S. 2014. Effect of growth rate on the microstructure and mechanical behaviour of directionally solidified Y3Al5O12/ MgAl2O4 eutectics. J. Cryst. Growth, 391: 18-24.
  • Bahlawane, N., Watanebe, T. 2000. Effect of moisture on the high-temperature stability of unidirectionally solidified Al2O3/ YAG eutectic composites. J. Am. Ceram. Soc., 83: 3077-3081.
  • Courtright, EL., Graham, HC., Katz, AP., Kerans, RJ. 1992. Ultra-high temperature assessment study: ceramic matrix composites. D.T.I.C. Doc., 1–78.
  • JUTEM, Japan Ultra-High Temperature Materials Research Center. http://www.jutem.co.jp
  • Ohnaka, I., Waku, Y., Yasuda, H., Mizutani, Y. 2002. New eutectic ceramics. In: B. Cantor, K. O’Reilly [eds.], Solidification and Casting: Series in Material Science and Engineering. Taylor & Francis. pp. 373-389.
  • Waku, Y., Nakagawa, N., Wakamoto, T., Ohtsubo, H., Shimizu, K., Kohtoku, Y. 1998. The creep and thermal stability characteristics of a unidirectionally solidified Al2O3/YAG eutectic composite. J. Mater. Sci., 33: 4943-4951.
  • Waku, Y. 1998. A new ceramic eutectic composite with high strength at 1873 K. Adv. Mater., 10: 615-617.

An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions

Year 2018, Volume: 8 Issue: 1, 260 - 263, 01.01.2018

Abstract

Nickel based alloys are mostly use in aircraft components such as nozzle, blade and heat shield in gas turbine engines. But the resisting temperatures of these alloys are limiting their applications, and cause environmental pollution with increasing energy costs. However directionally solidified eutectic oxide ceramics grown following melting, may eliminate these problems. In this study, the comparison of the production and hot corrosion resistance of eutectic structure MgAl2O4-Y3Al5O12 MAS-YAG produced by the directional solidification method and sintering magnesium aluminate spinel MAS -yttrium aluminium garnet YAG composite were compared for the same chemical composition. For this reason, volume, weight and microstructure SEM changes of the sinter and eutectic materials were observed. The flexural strength behaviour of sintered and eutectic MAS-YAG materials were investigated at room temperature and corrosive gas turbine condition at 1600°C. Corrosion results of directionally solidified MAS-YAG structure were better than conventional sinter ceramics for the same composition.

References

  • Abalı, S. 2014. Effect of growth rate on the microstructure and mechanical behaviour of directionally solidified Y3Al5O12/ MgAl2O4 eutectics. J. Cryst. Growth, 391: 18-24.
  • Bahlawane, N., Watanebe, T. 2000. Effect of moisture on the high-temperature stability of unidirectionally solidified Al2O3/ YAG eutectic composites. J. Am. Ceram. Soc., 83: 3077-3081.
  • Courtright, EL., Graham, HC., Katz, AP., Kerans, RJ. 1992. Ultra-high temperature assessment study: ceramic matrix composites. D.T.I.C. Doc., 1–78.
  • JUTEM, Japan Ultra-High Temperature Materials Research Center. http://www.jutem.co.jp
  • Ohnaka, I., Waku, Y., Yasuda, H., Mizutani, Y. 2002. New eutectic ceramics. In: B. Cantor, K. O’Reilly [eds.], Solidification and Casting: Series in Material Science and Engineering. Taylor & Francis. pp. 373-389.
  • Waku, Y., Nakagawa, N., Wakamoto, T., Ohtsubo, H., Shimizu, K., Kohtoku, Y. 1998. The creep and thermal stability characteristics of a unidirectionally solidified Al2O3/YAG eutectic composite. J. Mater. Sci., 33: 4943-4951.
  • Waku, Y. 1998. A new ceramic eutectic composite with high strength at 1873 K. Adv. Mater., 10: 615-617.
There are 7 citations in total.

Details

Primary Language English
Journal Section Research Article
Authors

Serkan Abalı This is me

Publication Date January 1, 2018
Published in Issue Year 2018 Volume: 8 Issue: 1

Cite

APA Abalı, S. (2018). An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions. Karaelmas Fen Ve Mühendislik Dergisi, 8(1), 260-263.
AMA Abalı S. An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions. Karaelmas Fen ve Mühendislik Dergisi. January 2018;8(1):260-263.
Chicago Abalı, Serkan. “An Investigation of the Chemical Strength of Directionally Solidified MgAl2O4-Y3Al5O12 Eutectic Ceramic Materials at Gas Turbine Conditions”. Karaelmas Fen Ve Mühendislik Dergisi 8, no. 1 (January 2018): 260-63.
EndNote Abalı S (January 1, 2018) An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions. Karaelmas Fen ve Mühendislik Dergisi 8 1 260–263.
IEEE S. Abalı, “An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions”, Karaelmas Fen ve Mühendislik Dergisi, vol. 8, no. 1, pp. 260–263, 2018.
ISNAD Abalı, Serkan. “An Investigation of the Chemical Strength of Directionally Solidified MgAl2O4-Y3Al5O12 Eutectic Ceramic Materials at Gas Turbine Conditions”. Karaelmas Fen ve Mühendislik Dergisi 8/1 (January 2018), 260-263.
JAMA Abalı S. An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions. Karaelmas Fen ve Mühendislik Dergisi. 2018;8:260–263.
MLA Abalı, Serkan. “An Investigation of the Chemical Strength of Directionally Solidified MgAl2O4-Y3Al5O12 Eutectic Ceramic Materials at Gas Turbine Conditions”. Karaelmas Fen Ve Mühendislik Dergisi, vol. 8, no. 1, 2018, pp. 260-3.
Vancouver Abalı S. An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions. Karaelmas Fen ve Mühendislik Dergisi. 2018;8(1):260-3.