论文部分内容阅读
采用增强体颗粒预处理和机械合金化技术成功制备了高性能B4 Cp/Al复合材料 ,研究了材料的微观组织结构和力学性能。 17% (体积分数 )B4 Cp/6 0 6 1Al复合材料的屈服强度为 415MPa,抗拉强度为 470MPa ,比常规粉末冶金复合材料的屈服强度和抗拉强度分别提高 6 9%和 70 %。高性能复合材料中B4 C颗粒形貌近似球形 ,平均粒度为 0 49μm ,颗粒均匀分布 ,颗粒与基体之间存在近百纳米厚的界面层 ,界面层中铝晶粒极其微细 ,呈带状且有序分布 ,并且界面层中弥散分布着纳米级颗粒。断口中增强体颗粒与基体之间界面结合良好。
High-performance B4 Cp / Al composites were successfully prepared by the pretreatment of reinforcement particles and mechanical alloying. The microstructure and mechanical properties of the composites were investigated. The yield strength and tensile strength of 17% (volume fraction) B4 Cp / 6 0 6 1Al composites were 415MPa and 470MPa, respectively, which were respectively 69% and 70% higher than the yield strength and tensile strength of conventional powder metallurgy composites. The morphology of B4 C particles in the high-performance composites is nearly spherical with an average particle size of 0 49 μm. The particles are uniformly distributed with an interface layer of almost 100 nm thick between the particles and the matrix. The aluminum particles in the interface layer are extremely fine and ribbon- Orderly distribution, and the interface layer dispersedly distributed nano-particles. Broken mouth to strengthen the interface between the body particles and matrix bonding well.