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首页> 外文期刊>Journal of Materials Science >The effect of heat treatment on mechanical properties of carbon nanofiber reinforced copper matrix composites
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The effect of heat treatment on mechanical properties of carbon nanofiber reinforced copper matrix composites

机译：热处理对碳纳米纤维增强铜基复合材料力学性能的影响

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摘要

The effect of heat treatment of carbon nanofibers (CNFs) on the mechanical properties of CNF (Ni/Y)–Cu composites was investigated. CNF (Ni/Y)–Cu composite powder mixtures were prepared by a combination of in situ chemical vapor deposition (CVD) and co-deposition processes. The in situ CNF (Ni/Y)–Cu powder synthesized by CVD was subject to heat treatment at temperatures ranging from 700 to 1,000 °C. The morphology and quality of CNFs were characterized by transmission electron microscope, scanning electron microscope, and Raman spectroscopy. Heat treatment can improve the CNFs by eliminating the amorphous carbon and disordered graphite. Bulk composites containing various fractions of CNFs were fabricated from the powder by cold pressing and sintering followed by repressing. With the same fraction of CNFs (2.5 wt%), the strengthening efficiency of the CNFs heat treated at 800 °C is 88% higher than that of as-synthesized CNFs. The strengthening mechanism of CNFs in the composites is discussed in detail.
机译：研究了碳纳米纤维（CNFs）热处理对CNF（Ni / Y）-Cu复合材料力学性能的影响。 CNF（Ni / Y）-Cu复合粉末混合物是通过原位化学气相沉积（CVD）和共沉积工艺相结合制备的。通过CVD合成的原位CNF（Ni / Y）-Cu粉末在700至1,000°C的温度范围内进行热处理。通过透射电子显微镜，扫描电子显微镜和拉曼光谱对CNF的形态和质量进行了表征。热处理可以通过消除无定形碳和无序石墨来改善CNF。通过冷压和烧结，然后再压制，由粉末制成包含各种含量的CNF的块状复合材料。使用相同比例的CNF（2.5 wt％），在800°C热处理的CNF的增强效率比合成CNF的增强效率高88％。详细讨论了复合材料中CNF的增强机理。

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