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碳纳米管因具有优异的电学、力学和热力学性能而被应用于各个领域。利用挤压工艺球磨Cu-CNT粉末制造复合材料,根据CNT的含量评估Cu-CNT复合材料的力学性能。采用行星式球磨机在500 r/min下混合分散CNT(1%,5%和10%)、铜(d=100 nm)、氧化锆球(90 g)和乙醇(20 m L)5 min。用铜制造直径50 mm、长100 mm的坯锭,在单轴压力下将复合材料粉末填入坯锭。在挤压过程中,坯锭在880°C下加热1 h后,坯锭负载200 t,得到圆棒状样品。采用粒度分布仪测量复合材料的粒度,同时采用SEM观察挤压样品的表面组织。使用压痕仪测量的力学性能随着CNT含量的增加而提高。Cu-CNTs复合材料的屈服强度、抗拉强度和硬度明显提高。
Carbon nanotubes have been applied in various fields due to their excellent electrical, mechanical and thermodynamic properties. The Cu-CNT powders were ball-milled using an extrusion process to produce composites. The mechanical properties of Cu-CNT composites were evaluated according to the content of CNTs. CNTs (1%, 5% and 10%), copper (d = 100 nm), zirconia balls (90 g) and ethanol (20 m L) were mixed and dispersed for 5 min at 500 r / min using a planetary ball mill. A billet of 50 mm in diameter and 100 mm in length is made of copper and the composite powder is filled into the billet under uniaxial pressing. In the extrusion process, the billet heated at 880 ° C for 1 h, the billet load 200 t, get a round rod sample. The particle size of composite was measured by particle size distribution analyzer, and SEM was used to observe the surface structure of the extruded sample. The mechanical properties measured using an indenter increase with increasing CNT content. Cu-CNTs composites yield strength, tensile strength and hardness increased significantly.