TY - JOUR
T1 - Comparative evaluation of two different methods for thermal shock resistance of laminated ZrB2-SiCw/BN ceramics
AU - Bai, Yuhang
AU - Sun, Mengyong
AU - Li, Mingxing
AU - Fan, Shangwu
AU - Cheng, Laifei
N1 - Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2018/11
Y1 - 2018/11
N2 - The thermal shock resistance (TSR) of laminated ZrB2–SiCw/BN ceramic was evaluated through indentation-quench and quenching-strengthening methods. It was correspondingly compared to monolithic ZrB2–SiCw ceramic. In the indentation-quench method with consideration to crack propagation on the surface layer, the critical thermal shock temperature of laminated ZrB2–SiCw/BN ceramic with surface residual tensile stress was 550 °C, which was lower than monolithic ZrB2–SiCw ceramic (600 °C). Unlike the microscopic method of crack growth measurement through indentation-quench testing, the quenching-strengthening method, which was based on the macroscopic properties of the material, mainly characterizing the residual strength subsequently to thermal shock, the critical thermal shock temperatures of the laminates and monolithic were 609 °C and 452 °C, respectively. Compared to the brittle fracture of ZrB2–SiCw ceramics, the deflection, bifurcation and delamination of the cracks as the main TSR mechanisms of the laminated ceramics, were revealed through quenching-strengthening method, which was more suitable for the TSR characterization of laminated ceramics.
AB - The thermal shock resistance (TSR) of laminated ZrB2–SiCw/BN ceramic was evaluated through indentation-quench and quenching-strengthening methods. It was correspondingly compared to monolithic ZrB2–SiCw ceramic. In the indentation-quench method with consideration to crack propagation on the surface layer, the critical thermal shock temperature of laminated ZrB2–SiCw/BN ceramic with surface residual tensile stress was 550 °C, which was lower than monolithic ZrB2–SiCw ceramic (600 °C). Unlike the microscopic method of crack growth measurement through indentation-quench testing, the quenching-strengthening method, which was based on the macroscopic properties of the material, mainly characterizing the residual strength subsequently to thermal shock, the critical thermal shock temperatures of the laminates and monolithic were 609 °C and 452 °C, respectively. Compared to the brittle fracture of ZrB2–SiCw ceramics, the deflection, bifurcation and delamination of the cracks as the main TSR mechanisms of the laminated ceramics, were revealed through quenching-strengthening method, which was more suitable for the TSR characterization of laminated ceramics.
KW - Indentation-quench method
KW - Laminated ceramics
KW - Quenching-strengthening method
KW - Thermal shock resistance
UR - http://www.scopus.com/inward/record.url?scp=85051373475&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.07.221
DO - 10.1016/j.ceramint.2018.07.221
M3 - 文章
AN - SCOPUS:85051373475
SN - 0272-8842
VL - 44
SP - 19686
EP - 19694
JO - Ceramics International
JF - Ceramics International
IS - 16
ER -