低密度TiB2／铝基复合材料的显微组织与内耗性能  

Microstructure and Internal Friction of Low Density TiB_2/Al Based Composites

作　　者：黄文貌[1] 许征兵[1,2] 上官琪[1] 许灵艳[1] 何娟[2] 曾建民[1,2] 

机构地区：[1]广西大学有色金属及其材料加工新技术教育部重点实验室,广西南宁530004 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《机械工程材料》2009年第2期63-66,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50864002);广西研究生教育创新计划资助项目(2008105930805M076)

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。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 K2 TiF6 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.

关 键 词：TiB2/铝基复合材料 低密度 内耗 

分 类 号：TG146.1[一般工业技术—材料科学与工程]