B4Cp增强镁锂基合金的固态复合技术

摘要

B4Cp/Mg-8Li-1Zn and B4Cp/Mg-8Li-1Al-1Y composites were prepared with hot-extrusion solid-state composite processing. The microstructures and mechanical properties of the composites were studied. With the optimized parameters, the deformation effects and the migration of a phase are improved, and the amount and size of foil gaps are decreased. The bonding force between foils is improved, and the oxidation of foils is lowered. The results of tensile test show that the strengths of the B4Cp/Mg-8Li- 1Zn and B4Cp/Mg-SLi-1Al-1Y composites are increased obviously after hot-extrusion solid-state composite processing (238 MPa and 257.23 MPa, respectively). The specific strength of B4Cp/Mg-8Li-1Al-1Y composite is the highest (169.23×103 cm).%采用热挤压固态复合技术制备B4Cp/Mg-8Li-1Zn和B4Cp/Mg-8Li-1Al-1Y复合材料,研究复合材料的显微组织和力学性能.结果表明:随着参数的优化,材料的变形效果和a相的移动性得到提高,而复合薄层的数量和间距尺寸减小;界面结合力得到提高的同时降低了界面的氧化程度.拉伸测试结果表明,通过固态热挤压复合强化,B4Cp/Mg-8Li-1Zn和B4Cp/Mg-8Li-1Al-1Y复合材料的强度得到明显提高,分别为238 MPa和257.23 MPa;B4Cp/Mg-8Li-1Al-1Y复合材料的比强度最高(169.23×103cm).