Microstructural evolution and mechanical properties of ZrO2 (3Y)-Al2O3-SiC((w)) ceramics under oscillatory pressure sintering
Microstructural evolution and mechanical properties of ZrO2 (3Y)-Al2O3-SiC((w)) ceramics under oscillatory pressure sintering
复制标题
振荡压力烧结ZrO2(3Y)-Al2O3-SiC((w))陶瓷的微观结构演变和力学性能
DOI：
10.1016/j.msea.2021.141445
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发表时间：
2021
期刊：
影响因子：
6.4
通讯作者：
Dai Jinning
中科院分区：
文献类型：
--
作者：
Zhang Jie;Zhu Tianbin;Sang Shaobai;Li Yawei;Pan Liping;Liao Ning;Liang Xiong;Wang Qinghu;Xie Zhipeng;Dai Jinning
采用振荡压力烧结法制备了具有优异力学性能的ZrO 2（3 Y）-Al 2 O3-SiC（w）陶瓷。研究了烧结温度对该陶瓷的致密度、显微结构和力学性能的影响。结果表明，选择合适的烧结温度有利于控制t-ZrO 2向m-ZrO 2的转变、ZrO 2晶粒的长大和试样的致密化。试样的最佳相对密度、抗弯强度、维氏硬度和断裂韧性分别达到98.54%、528 MPa、13.19 GPa和7.79 MPa·m1/2。ZrO 2/SiC（w）、Al 2 O3/SiC（w）和ZrO 2/Al 2 O3相界处的界面特征为半共格关系，有利于提高裂纹扩展阻力，从而提高陶瓷的抗弯强度和断裂韧性。
ZrO2(3Y)–Al2O3–SiC(w)ceramics with excellent mechanical properties were fabricated by oscillatory pressure sintering. The influence of sintering temperature on density, microstructural evolution and mechanical properties of such ceramics was studied in this work. The results showed that the selection of proper sintering temperature was favorable for controlling the transformation of t-ZrO2into m-ZrO2, growth of ZrO2grains and densification of specimens. The optimal relative density, bending strength, Vickers hardness and fracture toughness of specimens were up to 98.54%, 528 MPa, 13.19 GPa and 7.79 MPa·m1/2, respectively. Moreover, the interfacial characteristics at the phase boundary of ZrO2/SiC(w), Al2O3/SiC(w)and ZrO2/Al2O3were semi-coherent relationship, which was beneficial for increasing the resistance of crack propagation, consequently improving the bending strength and fracture toughness of such ceramics.