碳纳米管对Fe-P非晶的力学性能和晶化行为影响的研究

采用快速凝固技术制备了碳纳米管／铁碳非晶复合材料，并对其组织、力学性能和热稳定性进行了研究检测结果表明，碳纳米管在非晶基体中的弥散存在，使得非晶抗拉强度提高，晶化激活能增加，晶化特征温度明显提高，加入２Ｗ／％碳纳米管，使铁磷非晶的室温抗拉强度提高了１２０％，晶化激活能增加了约４０％，晶化开始温度提高了约１００Ｋ，此外，在温度高于其晶化温度约２００Ｋ时，碳纳米管和非晶基体界面间发生了固相反应。

STUDY ON THE MECHANICAL PROPERTY AND CRYSTALLIZATION BEHAVIOR OF Fe-P AMORPHOUS ALLOY EMBEDDED WITH CARBON NANOTUBES

A carbon nanotubes (CNTs) /Fe P amorphous alloy matrix composite was fabricated by rapid solidification process, and its structure, mechanical property and thermal stability were detected, respectively. The results show that CNTs, well dispersed in Fe P amorphous alloy, have a good interface with the matrix. With the content of CNTs increasing, the tensile strength of the composite increases and it is worth to note that the addition of 2 W/% CNTs results in an increasing in the tensile strength by a factor of 1.2 . The crystallization process of the composites, characterized by magnetothermal analysis (MTA) technique, begins at a higher temperature to meet the activation energy needed for the beginning of the crystallization process than the amorphous alloys without CNTs. The crystallizing onset temperature of the composite containing 2 W/% CNTs is 100 K higher and the activation energy is about 40 % higher than those of matrix alloy. In addition, carbon nanotubes may react with the matrix alloy when the temperature is about 200 K higher than corresponding crystallizing temperature.