Li_5La_3Ta_2O_(12)/Al基高阻尼复合材料的制备和阻尼性能

Preparation and Performance of Li_5La_3Ta_2O_(12) Particulate Reinforced High Damping Aluminum Composites

采用粉末冶金法制备Li5La3Ta2O12/Al基陶瓷复合材料,并评价其阻尼性能、硬度和屈服强度.结果表明,复合材料的室温阻尼和力学性能较纯Al具有显著提高.当陶瓷颗粒质量分数为20%时,复合材料的室温内耗值可达0.010,比相同温度范围内Al的内耗高约1个量级,对应的屈服强度和硬度值分别比Al提高约43%和28%.

The metal matrix ceramic composite,Li5La3Ta2O12/All,was prepared by powder metallurgy method.It was found that the damping capacity and the mechanical properties of the composite at room temperature are greatly enhanced in comparison with the pure Al.The damping capacity of the 20%Li5La3Ta2O12/Al composite can reach 0.010,which is one order of magnitude higher than that of pure Al,and the corresponding yield strength and microhardness of the composite are 43% and 28% higher than those of pure Al,respectively.