摘要
采用粉末冶金和热挤压的工艺分别制备了未添加碳纤维的基体金属、含未进行涂层处理短碳纤维的镁基复合材料和含镍涂层短碳纤维的镁基复合材料,并利用TEM-EDS和DMA分别对镁基复合材料的界面及阻尼性能进行了研究。结果表明碳纤维表面含镍涂层的引入在复合材料界面处形成了良好界面层结构;三种材料的阻尼容量都随应变振幅的增大和温度的升高而增大,且在25℃～400℃温度范围内都只存在一个阻尼峰,显现出热激活弛豫过程的特征;利用Arrhenius公式计算出了三种材料的热变形激活能的大小分别为1.287e V、1.129e V和1.725e V。
The base metal without addition of carbon fiber and magnesium matrix composites of short carbon fiber without coating treatment and with nickel coated short carbon fiber are prepared respectively through technologies of powder metallurgy and hot extrusion. The interface and damping capacity of magnesium matrix composite is studied through TEM-EDS and DMA. According to the result, it shows that good interface layer structure is formed at composite interface due to the introduction of nickel coating into the surface of carbon fiber. The damping capacity of three materials is enlarged along with the increase in strain amplitude and temperature. Besides, there is only one damping peak with temperature range of 25～400℃, thus manifesting the characteristic of thermal activation relaxation process. Thermal activation energy of three materials is calculated through Arrhenius, namely 1.298 e V, 1.129 e V and 1.725 e V.
出处
《铜仁学院学报》
2016年第4期35-39,共5页
Journal of Tongren University
基金
铜仁学院院级科研基金项目"含锰增强体对镁基复合材料性能的研究"(trxy DH1505)
贵州省科技厅联合基金项目"碳纤维表面改性对镁基复合材料组织与性能的影响"(黔科合LH字[2015]7230)
关键词
粉末冶金
短碳纤维
镍涂层
镁基复合材料
阻尼
powder metallurgy
short carbon fiber
nickel coating
magnesium matrix composites
damping
作者简介
任富忠（1978-）,男,山西平遥人,副教授,博士,研究方向：材料物理与化学.
