振荡热压烧结ZrB_(2)-SiC陶瓷的力学性能  

Mechanical Properties of ZrB_(2)-SiC Ceramics Sintered by Hot Oscillatory Pressing

作　　者：李冰[1] 赵科[1] 刘佃光[1] 刘金铃[1] LI Bing;ZHAO Ke;LIU Dianguang;LIU Jining(Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学,成都611756

出　　处：《航空制造技术》2024年第13期100-105,112,共7页Aeronautical Manufacturing Technology

摘　　要：采用振荡热压烧结(HOP)和热压烧结(HP)工艺制备了ZrB_(2)-SiC陶瓷,研究了振荡压力对ZrB_(2)-SiC陶瓷致密化及力学性能的影响。结果表明,与采用HP工艺制备ZrB_(2)-SiC陶瓷相比,HOP工艺的致密化速率有显著提升;ZrB_(2)与SiC两相界面结合良好;HOP工艺制备的ZS30样品的硬度和断裂韧性分别达到了21.1 GPa和7.3 MPa·m^(1/2),较采用HP工艺在相同烧结参数下制备的试样有大幅提升。HOP在制备高性能ZrB_(2)-SiC陶瓷方面展现出良好发展前景。ZrB_(2)-SiC ceramics were prepared using hot oscillatory pressing(HOP)and hot pressing(HP)processes,and the effect of oscillatory pressure on the densification and mechanical properties of ZrB_(2)-SiC ceramics was investigated.The results have shown that compared to using the HP process to fabricate ZrB_(2)-SiC ceramics,the densification rate of HOP process has been improved significantly,and the interface between ZrB_(2) and SiC is well bonded;The hardness and fracture toughness of the ZS30 sample prepared by the HOP process reached 21.1 GPa and 7.3 MPa·m^(1/2),respectively,which were significantly improved compared to the samples prepared by the HP process under the same sintering parameters.HOP has shown good development prospects in the preparation of high-performance ZrB_(2)-SiC ceramics.

关 键 词：超高温陶瓷(UHTCs) ZrB_(2) 烧结 致密化 力学性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]