Ni-CCNTs/AM60复合材料高温性能的研究
Study on High-temperature Performance of Ni-coated Carbon Nano-tube / AM60 Composite
熊淑秋, 袁秋红
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作者单位：(江西渝州科技职业学院 机电工程分院, 江西 新余 338029)
中文关键字：AM60镁合金； 化学包覆镍碳纳米管； 复合材料； 高温力学性能
英文关键字：AM60 alloy; Ni-coated carbon nano-tube; composite; high temperature mechanical properties
中文摘要：在氩气保护下，采用搅拌铸造法制备了化学包覆镍碳纳米管(Ni-CCNTs)/AM60复合材料，测试了铸态条件下复合材料的高温力学性能，并对微观组织和断口形貌进行观测和分析。结果表明：Ni-CCNTs /AM60复合材料具有良好的高温力学性能，在拉伸速度为1 mm/min以及温度为150 ℃时其抗拉强度达132.77 MPa；当碳纳米管含量过多时，会因团聚而影响复合效果，该复合材料高温性能急剧下降；复合材料的断裂形式由韧窝和撕裂棱组成，其断裂特征更趋向于韧性断裂。
英文摘要：Ni-coated carbon nano-tube(Ni-CCNTs)/AM60 composite was fabricated by stirring casting method. High temperature mechanical properties of the composite were tested and the fractograph morphology was observed by SEM. The results show that Ni-CCNTs/ AM60 composite has good mechanical properties at high temperature. When the tensile rate is 1 mm/min, the tensile strength of the composite is up to 132.77 MPa at 150 ℃. But the high temperature mechanical properties fall down with the addition of Ni-CCNTs. The fracture mode of the composite mainly consists of quasi-cleavage crack, dimple and tear edge, which show the feature of gliding fracture.