TY - JOUR
T1 - Thermal shock behavior of ZrB2-SiC composite ceramics with added TaSi2
AU - Wang, Shubin
AU - Xu, Cheng
AU - Ding, Yongbin
AU - Zhang, Xinghong
PY - 2013/11
Y1 - 2013/11
N2 - The thermal shock behavior of ZrB2-SiC composite ceramics was remarkably enhanced by the addition of TaSi2 particles. TaSi 2 enhanced the residual strength within the temperature range resulting from the crack-healing effect, especially at ∼ 1400 C. Residual fracture toughness increased with increasing TaSi2 content from 1000 C to 1600 C. The addition of soft phase TaSi2 positively affected the toughening mechanism. Considering the consumption of TaSi2 at ∼ 1400 C, fracture toughness of the TaSi2-containing ZrB 2-SiC based ceramic decreased with increasing temperature. The formation of a compressive stress zone beneath the surface oxide layer increased fracture toughness at 1600 C. The cohesive structure of the TaSi 2-containing ZrB2-based material inhibited crack formation and retained higher mechanical properties. Apparent surface changes were observed as a result of oxidation after severe thermal shock test. From the viewpoint of thermodynamics, thermal oxidation resistance improved with the addition of TaSi2.
AB - The thermal shock behavior of ZrB2-SiC composite ceramics was remarkably enhanced by the addition of TaSi2 particles. TaSi 2 enhanced the residual strength within the temperature range resulting from the crack-healing effect, especially at ∼ 1400 C. Residual fracture toughness increased with increasing TaSi2 content from 1000 C to 1600 C. The addition of soft phase TaSi2 positively affected the toughening mechanism. Considering the consumption of TaSi2 at ∼ 1400 C, fracture toughness of the TaSi2-containing ZrB 2-SiC based ceramic decreased with increasing temperature. The formation of a compressive stress zone beneath the surface oxide layer increased fracture toughness at 1600 C. The cohesive structure of the TaSi 2-containing ZrB2-based material inhibited crack formation and retained higher mechanical properties. Apparent surface changes were observed as a result of oxidation after severe thermal shock test. From the viewpoint of thermodynamics, thermal oxidation resistance improved with the addition of TaSi2.
KW - Mechanical properties
KW - Oxidation
KW - Thermal shock behavior
KW - ZrB-based ultrahigh-temperature ceramics
UR - https://www.scopus.com/pages/publications/84884355647
U2 - 10.1016/j.ijrmhm.2013.06.010
DO - 10.1016/j.ijrmhm.2013.06.010
M3 - 文章
AN - SCOPUS:84884355647
SN - 0263-4368
VL - 41
SP - 507
EP - 516
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
ER -