Microstructure and mechanical properties of Zr_(3)Al_(3)C_(5)-based ceramics synthesized by Al-Si melt infiltration

作     者：Xiaomeng FAN Yuzhao MA Yangfang DENG Jinxue DING Laifei CHENG Xiaomeng FAN;Yuzhao MA;Yangfang DENG;Jinxue DING;Laifei CHENG

作者机构：Science and Technology on Thermostructural Composite Materials LaboratoryNorthwestern Polytechnical UniversityXi’an 710072China College of Materials Science and EngineeringXi’an University of Architecture and TechnologyXi’an 710055China AECC Sichuan Gas Turbine EstablishmentChengdu 610500China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2021年第10卷第3期

页      面：529-536页

核心收录：

学科分类：080503[工学-材料加工工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51702261,52072303,and 51821091) the Natural Science Foundation of Shaanxi Province(No.2019JQ-634) the 111 Project(No.B08040) the Fundamental Research Funds for the Central Universities 

主　　题：Zr_(3)Al_(3)C_(5) ultra-high-temperature ceramics(UHTCs) twin carbide Al-Si alloy 

摘      要：In this work,bulk Zr_(3)Al_(3)C_(5)-based ceramics were synthesized by the infiltration of A1-Si melt into zirconium carbide (ZrC) *** phase composition,microstructure,and mechanical properties of as-fabricated ceramics were *** results demonstrate that Si is more effective to reduce the twin boundary energy of ZrC than A1,and thus promotes the decrease of formation temperature of Zr_(3)Al_(3)C_(5).With the infiltration temperatures increasing from 1200 to 1500 ℃,the Zr_(3)Al_(3)C_(5) content increases from 10 to 49 vol%,which is contributed to the increase of flexural strength from 62±9 to 222±10 MPa,and fracture toughness (KIC) from 2.8+0.2 to 4.1±0.3 MPa.m^(1/2).The decrease of mechanical properties for the samples fabricated at 1600 ℃ is ascribed to the abnormal growth of Zr_(3)Al_(3)C_(5) grains.