Fracture behaviour of a directionally solidified Al2O3/YAG eutectic

被引：2
作者：
Poza, P.
Pastor, J. Y.
Llorca, J.
Waku, Y.
机构：
[1] Univ Rey Juan Carlos, Dept Ciencia & Ingn Mat, Escuela Super Ciencias Expt & Tecnol, Madrid 28933, Spain
[2] Univ Politecn Madrid, Dept Ciencias Mat, Escuela Tecn S Ingn Caminos Canales & Puertos, E-28040 Madrid, Spain
[3] Japan Ultra High Temp Mat Res Inst, Yamaguchi 7550001, Japan
来源：
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO | 2006年 / 45卷 / 06期
关键词：
eutectic ceramics; directional solidification; mechanical behaviour; fracture; scanning electron microscopy; transmission electron microscopy;
D O I：
10.3989/cyv.2006.v45.i6.268
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This investigation was aimed to analyse the mechanical behaviour of an eutectic ceramic Al2O3/ YAG processed by directional solidification in a Bridgman furnace. Fracture toughness and young modulus were measured through three point bend tests from room temperature up to 1650 degrees C. These tests were performed under stroke control using two different cross-head speeds to analyse the influence of strain rate on the fracture behaviour. The material was brittle up to 1400 degrees C and plastic deformation was found at higher temperature. Plastic deformation was reduced, or even disappeared, when the strain rate was increased. Finally, the investigation was completed with the analysis of the deformation and fracture micromechanisms in the crack tip.
引用
收藏
页码：401 / 407
页数：7
相关论文
共 23 条
  • [1] BUCCI BJ, 1972, ASTM SPECIAL TECHNOL, V514
  • [2] Davidge R.W., 1979, MECH BEHAV CERAMICS, P64
  • [3] Crystallographic texture and orientation variants in Al2O3-Y3Al5O12 directionally solidified eutectic crystals
    Frazer, CS
    Dickey, EC
    Sayir, A
    [J]. JOURNAL OF CRYSTAL GROWTH, 2001, 233 (1-2) : 187 - 195
  • [4] Gómez ARP, 2005, BOL SOC ESP CERAM V, V44, P342
  • [5] Stress intensity factor, compliance and CMOD for a general three-point-bend beam
    Guinea, GV
    Pastor, JY
    Planas, J
    Elices, M
    [J]. INTERNATIONAL JOURNAL OF FRACTURE, 1998, 89 (02) : 103 - 116
  • [6] Phase distribution and residual stresses in melt-grown Al2O3-ZrO2(Y2O3) eutectics
    Harlan, NR
    Merino, RI
    Peña, JI
    Larrea, A
    Orera, VM
    González, C
    Poza, P
    Llorca, J
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2002, 85 (08) : 2025 - 2032
  • [7] BRITTLE-DUCTILE TRANSITION AND DISLOCATION MOBILITY IN SAPPHIRE
    KIM, HS
    ROBERTS, S
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1994, 77 (12) : 3099 - 3104
  • [8] Influence of the Y2O3 content and temperature on the mechanical properties of melt-grown Al2O3-ZrO2 eutectics
    LLorca, J
    Pastor, JY
    Poza, P
    Peña, JI
    de Francisco, I
    Larrea, A
    Orera, VM
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2004, 87 (04) : 633 - 639
  • [9] FRACTURE-TOUGHNESS OF SINGLE-CRYSTAL YAG
    MAH, T
    PARTHASARATHY, TA
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1993, 28 (11): : 1383 - 1385
  • [10] MERINO RI, 1997, BOL SOC ESP CERAM V, V36, P336
123