TY - JOUR
T1 - Slow crack growth behavior in Si3N4 sintered with Yb2Si2O7 tie-line composition additives
AU - Choi, Heon Jin
AU - Kim, Hyeong Jong
AU - Lee, June Gunn
AU - Kim, Young Wook
PY - 2001/4
Y1 - 2001/4
N2 - Slow crack growth behavior of two gas pressure sintered Si3N4 ceramics with different additives; a Yb2Si2O7 composition and an A12O3-Y2O3 composition, was investigated by constant stress-rate ("dynamic fatigue") testing at 1400°C. The slow crack growth parameter, n, was 14.7 and 6.3 for Si3N4 with Yb2Si2O7 and AI2O3-Y2O3 compositions, respectively. Superior crack growth resistance of Si3N4 with Yb2Si2O7 composition was due to its higher refractoriness of intergranular glassy films, compared to Si3N4 with A12O3-Y2O3 composition.
AB - Slow crack growth behavior of two gas pressure sintered Si3N4 ceramics with different additives; a Yb2Si2O7 composition and an A12O3-Y2O3 composition, was investigated by constant stress-rate ("dynamic fatigue") testing at 1400°C. The slow crack growth parameter, n, was 14.7 and 6.3 for Si3N4 with Yb2Si2O7 and AI2O3-Y2O3 compositions, respectively. Superior crack growth resistance of Si3N4 with Yb2Si2O7 composition was due to its higher refractoriness of intergranular glassy films, compared to Si3N4 with A12O3-Y2O3 composition.
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U2 - 10.1016/S0955-2219(00)00218-1
DO - 10.1016/S0955-2219(00)00218-1
M3 - Article
AN - SCOPUS:0035309652
SN - 0955-2219
VL - 21
SP - 471
EP - 475
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 4
ER -