欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用液相原位反应法制备了Cu-0．9Y203（体积分数，％）复合材料．TEM观察与SAD分析表明：Cu基体上均匀分布着纳米Y203颗粒，其平均尺寸和颗粒间距分别为5．0和20nm，Y203颗粒与基体共格，晶面（422）Y2O3//（111）cu，晶带轴[011]-]Y2O3//[112]cu．实验结果表明，cu-0．9Y2O3复合材料的抗拉强度为568MPa，其强化机制为Orowan机制和切割机制共同作用，其中0rowan机制产生的强度增值为185MPa，切割机制引起强度增加195MPa．
英文摘要：
A growing trend to use new oxide dispersion strengthened （ODS） copper-based composites is observed recently world-wide. Yttria （Y203） and most rare earth oxides are poten tially attractive as dispersiods for copper-based composites owing to their thermodynamic stability. Cu-0.9Y203 （volume fraction, %） composites were prepared with Cu-0.4Y （mass fraction, %） alloy by in situ reaction at liquidus temperature. The objective of the work was to investigate changes in structure and strengthening mechanism of Cu Y203 composites. TEM observation and SAD analysis of the composites indicate that the obtained Y203 nano particles are uni formly distributed in copper matrix, their mean size and space between particles are 5.0 nm and 20 nm, respectively, and the cubic Y203 phase is coherent with copper matrix, which indicated （422）y2oa//（111）Cu and [011]Y2O3a//[112]cu orientation relationship. The strengthening mechanism of the composites is analyzed and explained in three aspects： matrix strengthening, fine particles strengthening according to the Orowan model and shear model. The tensile strength of Cu-0.9Y203 composites is 568 MPa, which is strengthened by both Orowan mechanism and shear mechanism,the strength value added by Orowan mechanism and shear mechanism can be calculated to be 185 and 195 MPa, respectively.
同期刊论文项目
同项目期刊论文
Large electrical resistivity and high saturation magnetization nanocrystalline Fe86B13Cu1 alloy prep
Microstructures and soft magnetic properties of nanocrystalline Fe86B13Cu1 alloy annealed by hot iso
期刊信息
位置：