TY - JOUR
T1 - Morphological evolution and weak interface development within chemical-vapor-deposited zirconia coating deposited on Hi-Nicalon™ fiber
AU - Li, Hao
AU - Lee, Jinil
AU - Libera, Matthew R.
AU - Lee, Woo Y.
AU - Kebbede, Anteneh
AU - Lance, Michael J.
AU - Wang, Hongyu
AU - Morscher, Gregory N.
PY - 2002/6
Y1 - 2002/6
N2 - The phase contents and morphology of a ZrO2 fiber coating deposited at 1050°C on Hi-Nicalon™ by chemical vapor deposition (CVD) were examined as a function of deposition time from 5-120 min. The morphological evolution in the ZrO2 coating was correlated to the development of delamination within the ZrO2 coating. The delamination appears to occur as a result of: (i) continuous formation of tetragonal ZrO2 nuclei on the deposition surface; (ii) martensitic transformation of the tetragonal phase to a monoclinic phase on reaching a critical grain size; and (iii) development of significant compressive hoop stresses because of the volume dilation associated with the transformation. Our observations suggest that it will be of critical importance to further understand and eventually control the nucleation and grain growth behavior of CVD ZrO2 and its phase transformation behavior for its potential applications for composites.
AB - The phase contents and morphology of a ZrO2 fiber coating deposited at 1050°C on Hi-Nicalon™ by chemical vapor deposition (CVD) were examined as a function of deposition time from 5-120 min. The morphological evolution in the ZrO2 coating was correlated to the development of delamination within the ZrO2 coating. The delamination appears to occur as a result of: (i) continuous formation of tetragonal ZrO2 nuclei on the deposition surface; (ii) martensitic transformation of the tetragonal phase to a monoclinic phase on reaching a critical grain size; and (iii) development of significant compressive hoop stresses because of the volume dilation associated with the transformation. Our observations suggest that it will be of critical importance to further understand and eventually control the nucleation and grain growth behavior of CVD ZrO2 and its phase transformation behavior for its potential applications for composites.
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U2 - 10.1111/j.1151-2916.2002.tb00312.x
DO - 10.1111/j.1151-2916.2002.tb00312.x
M3 - Article
AN - SCOPUS:0036608261
SN - 0002-7820
VL - 85
SP - 1561
EP - 1568
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 6
ER -