脉冲磁场下,采用7055-(Al-3％B)-Ti剂体系熔体原位反应法成功制备TiB2/7055铝基复合材料.利用XRD、OM和SEM等测试技术研究了复合材料的相组成和微观组织,同时在电子拉伸试验机上测试了复合材料的拉伸性能.结果表明,磁场作用下,原位反应更快更充分,颗粒分布更均匀,生成的TiB2颗粒呈六边形或多边状,平均尺寸约为600nm,α-Al晶粒细化到约10～20μm,第二相由连续网格状分布转变为非连续性分布.复合材料的抗拉强度从310MPa提高到333MPa,延伸率从7.5％提高到了8.0％.
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