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首页> 外文期刊>Journal of Materials Engineering and Performance >Wetting Behavior and Reactivity Between AlTi6 Alloy and Carbon Nanotubes
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Wetting Behavior and Reactivity Between AlTi6 Alloy and Carbon Nanotubes

机译：AlTi6合金与碳纳米管之间的润湿行为和反应性

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摘要

Wetting behavior between molten AlTi6 alloy and nanoporous carbon substrate (carbon nanotubes paper) was investigated by a sessile drop method in vacuum at 800, 900, and 1000 A degrees C. In order to avoid the effect of native oxide film on metal sample, an advanced capillary purification technique coupled with non-contact heating was applied. The AlTi6 drop did not wet the MWCNT paper immediately after deposition on the substrate at 800 A degrees C, forming a contact angle of theta A = 153A degrees. The increase in temperature up to 900 A degrees C and holding the system for 15 min also did not affect the contact angle (theta = 153 +/- A 1). Further heating above 930 A degrees C at a rate of 5 A degrees C/min caused a gradual lowering of contact angle down to similar to 130A degrees and after about 10-min interaction at 1000 A degrees C, it reached the final value of 123A degrees. Structural investigations of solidified sessile drop AlTi6/MWCNT couple by scanning and transmission electron microscopy showed that high-temperature interaction between MWCNTs and molten AlTi6 alloy is accompanied with liquid metal infiltration of MWCNT substrate, fragmentation of MWCNTs, and formation of TiC in the form of rod-like crystallites and fine particles uniformly distributed in the metal matrix. The mechanism of MWCNT -> TiC transformation in the AlTi6/MWCNT system by high-temperature liquid-assisted process is discussed.
机译：通过固溶滴落法在800、900和1000 A的真空下研究了熔融的AlTi6合金与纳米多孔碳基底（碳纳米管纸）之间的润湿行为。为了避免自然氧化膜对金属样品的影响，应用了先进的毛细管净化技术以及非接触加热。在以800 A的温度沉积在基板上之后，AlTi6液滴并未立即润湿MWCNT纸，形成的接触角为θA = 153A。温度升高到900 A摄氏度并保持系统15分钟也不会影响接触角（θ= 153 +/- A 1）。在930 A摄氏度以上以5 A摄氏度/分钟的速率进一步加热导致接触角逐渐降低至类似于130A摄氏度，在1000 A摄氏度下相互作用约10分钟后，达到最终值123A度。通过扫描和透射电子显微镜对固着无滴AlTi6 / MWCNT偶的结构研究表明，MWCNT与熔融的AlTi6合金之间的高温相互作用伴随着MWCNT基底的液态金属渗透，MWCNT的碎裂以及TiC的形成。棒状微晶和细颗粒均匀地分布在金属基质中。讨论了AlTi6 / MWCNT体系中高温液相辅助法制备MWCNT→TiC的机理。

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