摘要
In-situ rod-like Al2O3 grain was prepared by adding CAS multiphase additives under the sintering condition of 30 MPa, 1 550℃and 1 h.The sintering behaviors,microstructure,toughening mechanism and access of Al2O3 ceramics were investigated by SEM,EDS and WDW omnipotent electronic mechanical testing machine,etc,and the crack propagating model of cylindrical crystal/3Y-TZP composite toughening Al2O3 ceramics was established.The results show that the composite additives prompt the anisotropic growth of Al2O3 grain,which strengthens toughening effect of 3Y-TZP in 3Y-TZP/Al2O3 composite ceramics.Moreover, the experimental material density is near to theoretical density,bending strength is 556.35 MPa,and fracture toughness is 6.73 MPa·m1 /2.The mechanical properties of the materials are obviously improved.
In-situ rod-like A1203 grain was prepared by adding CAS multiphase additives under the sintering condition of 30 MPa, 1 550℃ and 1 h. The sintering behaviors, microstructure, toughening mechanism and access of Al2O3 ceramics were investigated by SEM, EDS and WDW omnipotent electronic mechanical testing machine, etc, and the crack propagating model of cylindrical crystal/3Y-TZP composite toughening Al2O3 ceramics was established. The results show that the composite additives prompt the anisotropic growth of Al2O3 grain, which strengthens toughening effect of 3Y-TZP in 3Y-TZP/Al2O3 composite ceramics. Moreover, the experimental material density is near to theoretical density, bending strength is 556.35 MPa, and fracture toughness is 6.73 MPa.m1/2. The mechanical properties of the materials are obviously improved.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第2期388-392,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(2005-11)supported by the Natural Foundation of Heilongjiang Province,China
Project(10551306)supported by the Ministry ofEducation of Heilongjiang Province,China
Projects(3062,L030)supported by the Science and Research Foundation of JiamusiUniversity,China
关键词
高温回火
金属陶瓷
铝
合金
rod-like grain
multitoughening
additives
Al2O3
microstructure
mechanical properties
