添加TiCN相对热压烧结Si3_N_4陶瓷力学性能的影响  

Effect of TiCN Addition on the Mechanical Properties of Si_3N_4 Ceramics by Hot-pressing Sintering

作　　者：熊浩 奚修安 郭伟明[1] 税安泽[2] 林华泰 XIONG Hao;XI XIU-an;GUO Wei-ming;SHUI An-ze;LIN Hua-tai(School of Eleetromeehanieal Engineering, Guangdong University of Technology, Guangzhou 510006;South China University- of Technology, School of Materials Science and Engineering, Guangzhou 510641)

机构地区：[1]广东工业大学机电工程学院,广州510006 [2]华南理工大学材料科学与工程学院,广州510641

出　　处：《佛山陶瓷》2018年第4期11-14,共4页Foshan Ceramics

基　　金：国家自然科学基金--广东联合基金重点项目(U1401247)

摘　　要：本文以α-Si_3N_4为主要原料,3wt%Al_2O_3和5wt%Y2O_3为烧结助剂,TiCN为添加剂,通过热压烧结,详细研究了低烧结温度条件下TiCN的粒度和含量对Si_3N_4陶瓷的力学性能的影响。研究结果表明:在烧结温度为1600℃的条件下,TiCN的平均粒度约为1μm时,其增韧效果较为明显,且即随着TiCN添加量的增加,Si_3N_4陶瓷的韧性逐渐增加,从TiCN添加量为5%时的5.7±0.2 MPa·m^(1/2)增加到20%时6.5±0.2MPa·m^(1/2),且Si_3N_4陶瓷的硬度保持较高(约为17.7±0.2 GPa),从而在低温条件下制备出了高硬度、高韧性的Si_3N_4陶瓷。In this study, the effect of TiCN particle size and content on the mechanical properties of Si_3N_4 ceramics by HP sintering at low temperature, with 5 wt% Yb_2O_3 and 3 wt% Al_2O_3 as the additive, was investigated in detail. The results show that, the optimum value of particle size is 1μm, fired at 1600℃, which is Appropriate granularity to improve the mechanical properties of Si_3N_4 ceramics. AS the content of TiCN increased from 5 wt% to 20 wt%, the toughness of Si_3N_4 ceramics gradually increased from 5.7 ±0.2 MPa·m^（1/2） to 6.5 ±0.2 MPa·m^（1/2） and the Vickers hardness of the Si_3N_4 ceramics is still high. The Si_3N_4 ceramics with high hardness and toughness were prepared under low temperature.

关 键 词：碳氮化钛 氮化硅 热压烧结 力学性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]