본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

AE(Acoustic Emission)에 의한 세라믹 복합재료의 고인성화 기구 분석
Analysis of Toughening Mechanism of Ceramic Composites by Acoustic Emission

장병국    (쌍용양회공업(주) 중앙연구소  );
  • 초록

    Al2O3/20 vol%YAG composite containing equiaxed grains and Al2O3/20 vol%LaAl11O18 composite containing elongated grains were fabricated using Al2O3-Y2O3 composition and Al2O3-La2O3 composition, respectively, by hot-pressing. In order to investigate the influence of microstructural control of second phase on toughening effect of toughened ceramic composites, AE (acoustic emission) measurements have been coupled with fracture toughness experiments(SENB and SEPB method). A separation of the fracture toughness and analysis of toughening mechanism was possible using the AE technique. The fracture toughness of hot-pressed materials was estimated to be 3.2 MPam0.5 for monolithic alumina, 4.7 MPam0.5 for Al2O3/20 vol%YAG composite and 6.2 MPam0.5 for Al2O3/20 vol%LaAl11O18 composite. In monolithic Al2O3, toughening does not occur as a result of either microcracking or grain bridging, whereas, composites exhibit toughening effects by both microcracking in the frontal zone and gain bridging in the wake zone, resulting in an improvement of fracture toughness as compared with monolithic Al2O3. The fracture toughness of Al2O3/20 vol%LaAl11O18 composite is higher than that of Al2O3/20 vol%YAG composite. It may be attributed to the elongated microstructure of Al2O3/20 vol%LaAl11O18 composite, resulting relatively greater bridging effect.


  • 주제어

    Composites .   Microstructure .   Acoustic emission .   Elongated grain .   Equiaxed grain .   Fracture toughness .   Toughening mechanism .   Microcracking .   Grain bridging.  

  • 참고문헌 (19)

    1. Acoustic Emission Monitoring of Steel Rail Road Bridges , Z. Gong;E.O. Nyborg;G. Oommen , Materials Evaluation / v.50,pp.883-887,
    2. Acoustic Emission Study for Fracture Origin of Sintered Mullite in 4-Point Bending Test , Y. Yamade;T. Kishi , J.of Ceram.Soc of Jpn. / v.98,pp.273-279,
    3. AE Analysis of Fracture Mechanisms of Beta-Alumina during Four Point Bending Test , A. Okuno;M. Shiwa;T. Kishi , J.of Ceram.Soc of Jpn. / v.98,pp.98-103,
    4. Effect of Processing Mechanical Properties of Platelet-Reinforced Mullite Composites , C. Nischik;M.M. Seilbold;N.A. Tiavitzky;N.Claussen , J. Am. Ceram. Soc. / v.74,pp.2464-2468,
    5. Microstructural Design of Toughened ceramics , P.F. Becher , J. Am. Ceram. Soc. / v.74,pp.255-269,
    6. Effect of Induced Microcracking on the Fracture Toughness of Ceramics , N. Claussen;J. Steeb;R.F. Pabst , Ceramic Bulletin / v.56,pp.559-562,
    7. Mpping of Failure Process in Whisker-Ceramics Composites using Acoustic Emission Parameter , Y. Kogo;Y. Kagawa , J. Mater. Sci. Let. / v.8,pp.44-46,
    8. Toughening of Ceramics by Circumferential Microcracking , A.G. Evans;K.T. Faber , J. Am. Ceram. Soc. / v.64,pp.394-398,
    9. Interface and Strength in Ceramic Matrix Composites , T. Kishi;M. Enoki;H. Tsuda , Materials Science and Engineering / v.A143,pp.103-110,
    10. Microstructure-Strength Properties in Ceramics:I,Effect of crack Size on Toughness , R.F. cook;B.R. Lawn;C.J. Fairbanks , J. Am. Ceram. Soc. / v.68,pp.604,
    11. Toughening Mechanism of TiB₂by AE , S. Torizuka;T. Kishi;T. Kishi(ed.) , Proceeding of 9th Nation Conference on Acoustic Emission / v.,pp.205-210,
    12. Flaw Tolerance in Ceramics with Rising Crack-Resistance Characteristics , S.J. Bennison;B.R. Lawn , J. Mater. Sci. / v.24,pp.3169,
    13. Development of the High Sensitivity and Low Noise Integrated Acoustie emission Sensor , M. Shiwa;H. Inaba;T. Kishi , Japanese Society for Non-Destructive Inspection / v.42,pp.374-382,
    14. Enhanced Fracture Toughness in Layered Microcomposites of Ce-ZrO₂and Al₂O₃ , D.B. Marshall;J.J. Ratto , J. Am. Ceram. Soc. / v.74,pp.2979-2987,
    15. Determination of Fracture Parametere of Moratar and Concrete Beams by using Acoustic Emission , L.H. Chen;C.T. Cheng;S.E. Chen , Materials Evaluation / v.50,pp.884-894,
    16. An experimental Study of Toughening and Degradation due to Microcracking in a Ceramic Composite , L.X. Han;R. Warren;S. Suresh , Acta Metall / v.40,pp.259-274,
    17. Toughening in Ceramic Particulate and Whisker Composite , W. Rice , Ceram. Eng. Sci. Proc. / v.11,pp.667-694,
    18. Characterization of Debonding Process of Fiber-Rein-forced Composites by Acoustic Emission , M. Enoki;D. Valentin;H. Tsuda;T. Kishi , Nondestr.Test. Eval. / v.8-9,pp.857-868,
    19. R-Curve Behavior in a SiC Whisker/Alumina Matrix Composites , J. Homeny;W.L. Voughn , J. Am. Ceram. Soc. / v.73,pp.2009-2015,

 저자의 다른 논문

  • 장병국 (0)

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • NDSL :
  • 한국세라믹학회 : 저널
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기