论文部分内容阅读
在醇基介质中采用阳极氧化方法成功在Ti6Al4V合金表面制备出大面积的α和β相均为纳米管结构阵列。通过扫描电子显微镜(SEM)和X射线能谱仪(EDXA)对纳米管阵列的表面形貌、微结构和热稳定性进行了表征。实验结果表明:在醇基溶液中采用阳极氧化方法制备大面积纳米管阵列时,外加电压的增加有利于合金表面多孔纳米结构的形成。在外加电压为30V时,Ti6Al4V合金表面的双相区均获得较为均匀的纳米管阵列。Ti-Al-V-O纳米管阵列管长约900nm、管径约90nm、壁厚约7.4nm。EDXA结果表明:在阳极氧化后,表面Al和V含量降低。Ti-Al-V-O纳米管阵列在550℃下晶化后,其表面形貌可保持规则的纳米阵列结构,而在更高温度下热处理可导致纳米管阵列局部坍塌并发生表面烧结致密化现象。
In the alcohol-based media, anodic oxidation was used to successfully fabricate a large array of α and β phases on the surface of Ti6Al4V alloy. The surface morphology, microstructure and thermal stability of nanotube arrays were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXA). The experimental results show that when anodic oxidation is used to prepare large-area nanotube arrays in alcohol-based solution, the increase of applied voltage is beneficial to the formation of porous nanostructures on the surface of the alloy. When the applied voltage is 30V, a more uniform nanotube array is obtained in the dual phase region of the Ti6Al4V alloy surface. The Ti-Al-V-O nanotube array tube has a length of about 900 nm, a diameter of about 90 nm and a wall thickness of about 7.4 nm. EDXA results show that the surface Al and V content decreases after anodization. When the Ti-Al-V-O nanotube arrays are crystallized at 550 ° C, the surface morphology of the Ti-Al-V-O nanotubes remains regular nano-array structure, while the heat treatment at higher temperatures can lead to local collapse of the nanotube arrays and densification of the surface.