【摘要】 为了获得具有良好显微组织和内耗性能的TiB2增强铝基复合材料,采用K2TiF6和KBF4混合盐放热反应(LSM)法制备了TiB2/铝基复合材料,采用扫描电镜、光学显微镜和X射线衍射仪等对所制备的复合材料进行了表征,并对其内耗性能进行了研究。结果表明:采用LSM法制备的TiB2/铝基复合材料密度低于3.5 g.cm-3,原位生成的TiB2增强相细小且分布均匀,复合材料具备较好的内耗性能(内耗值为6.65×10-3左右),是一种低密度高内耗的复合材料。更多还原

【Abstract】 In order to obtain Al based composites with favorable microstructure and high internal friction,the TiB2/Al based composite was fabricated with an exothermic reaction process via K2TiF6 and KBF4 salts(LSM).The prepared composite was characterized by scanning electronic microscope,optical microscope and X-ray diffraction.And the internal friction capacity was also investigated.The results indicate that the density of TiB2/Al composite prepared by LSM was lower than 3.5 g·cm-3,the in-situ TiB2 phase was fine and well-distributed,and the composites performed well in internal friction(the internal friction value was about 6.65×10-3).So the TiB2/Al based composites was a kind of material with low density and high internal friction.更多还原