摘要
以ZrOCl2·8H2O和B4C为主要原料,采用非均匀成核法、原位生成和无压烧结技术制备出ZrB2/B4C陶瓷复合材料。重点探讨了烧结温度对ZrB2/B4C陶瓷复合材料组织结构和性能的影响。结果表明,随着烧结温度的升高,ZrB2/B4C陶瓷复合材料的密度和硬度均为先升高后降低。材料的最佳烧结温度为2060℃,烧结时间为0.5h。在最佳烧结工艺条件下,ZrB2/B4C陶瓷复合材料的相对密度、硬度和断裂韧性分别为96%T.D,42.3GPa和4.7MPa·m1/2。
ZrB2/B4C composites were in suit synthesized by heterogeneous nucleation process under the conditions that pressureless sintering using B4C and ZrOCl2·8H2O as main starting materials. The effect of sintering temperature on the materials microstructure and physical properties were investigated. The results showed that, as the sintering temperature increasing, both the relative density and hardness of ZrB2/B4C ceramic composites at first increased but decreased finally. The optimum sintering temperature is 2060℃ and heat preservation time is 30 min. The relative density, hardness and fracture toughness of ZrB2/B4C ceramic composites are 96%T.D, 42.3 GPa and 4.7 MPa·m^1/2, respectively, when the optimum sintering technical parameters are applied.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A01期635-638,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(50372010)
关键词
B4C
ZrB2粒子
非均匀成核
断裂韧性
B4C
ZrB2 particle
heterogeneous nucleation process
fracture toughness
