摘要
以纳米TiN和亚微米SiC粉体为原料,采用湿法球磨和喷雾干燥技术制备了均匀分布的SiC/TiN(np)纳米复合粉体,并通过无压烧结工艺制备出SiC/TiN(np)纳米复合陶瓷,研究了纳米TiN颗粒对SiC材料显微结构和力学性能的影响。研究结果表明:纳米TiN的引入抑制了SiC晶粒的生长,材料的断裂方式以沿晶断裂为主,裂纹产生偏转和分义,使材料的抗弯强度、硬度和断裂韧性分别达到557 MPa、21 GPa和6.6 MP·am0.5。
SiC/TiN（np） composite nanopowders were prepared by wet milling and spray drying technique with nano-TiN and SiC powders as starting materials, SiC/TiN（np） composite nanoceramic was pressureless sintered, and the effects of TiN nanoparticles on the microstructure and mechanical properties were studied. The results show that the growth of SiC grains are restrained by the introduction of nano-TiN, and the fracture mode of the materials is mainly intergranular. The bending strength, Vickers hardness and fracture toughness of the composite nanoceramic are 557 MPa, 21 GPa and 6.6 MPa.m0.5, respectively.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A02期543-547,共5页
Rare Metal Materials and Engineering
基金
浙江省重大科技攻关项目(2006C11184)资助
