Ti-10Mo-6Zr-4Sn-3Nb在Hank’s溶液中的腐蚀行为研究  

Corrosion behavior of Ti-10Mo-6Zr-4SN-3Nb in Hank’s solution

作　　者：王博涵 郑传波[1] 程军[2] 陈靓瑜[1] WANG Bohan;ZHENG Chuanbo;CHENG Jun;CHEN Liangyu(School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Shaanxi Key Laboratory of Biomedical Metal Materials,Northwest Institute for Non-ferrous Metals Research,Xi’an 710016,China)

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212100 [2]中国西北有色金属研究院陕西省生物医用金属材料重点实验室,西安710016

出　　处：《重庆理工大学学报（自然科学）》2024年第5期170-178,共9页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学面上基金项目(52271249)。

摘　　要：Ti-10Mo-6Zr-4Sn-3Nb(Ti-B12)具有优良的力学性能,可作为生物医用材料使用。然而,对于Ti-B12的腐蚀行为,目前还缺乏研究。通过光学显微镜、X射线衍射和电化学测量研究了铸态、退火、形变3种工艺的Ti-B12的显微组织和在Hank’s溶液中的腐蚀行为。结果表明,与铸态和形变态的Ti-B12相比,退火态Ti-B12具较低的腐蚀电流密度,具有更好的耐蚀性。而施加阳极电位后,退火Ti-B12在动电位极化和静电位极化试验中均表现出较高的钝化电位,较低的钝化电流密度,更高的氧空位扩散系数。这是因为退火态Ti-B12与铸态Ti-B12相比降低了硬度,细化了晶粒,消除了组织缺陷;而形变态Ti-B12在塑性形变过程中产生更多位错,产生β形变孪晶,伴有少量α沉淀相析出,组织硬度提高。这2种工艺与铸态Ti-B12相比组织发生显著变化,也展示出不同于铸态Ti-B12的腐蚀行为。Ti-10Mo-6Zr-4Snv-3Nb(Ti-B12)exhibits excellent mechanical properties and can be used as a biomaterial.Currently,few research is available on the corrosion behavior of Ti-B12.This paper studies the microstructure and corrosion behavior of Ti-B12 in the as-cast,annealed,and deformed states in Hank’s solution by employing optical microscopy,X-ray diffraction,and electrochemical measurements.Our results indicate that,compared with the as-cast and deformed states of Ti-B12,the annealed Ti-B12 exhibits lower corrosion current density and better corrosion resistance.When subjected to an anodic potential,annealed Ti-B12 shows higher passivation potential,lower passivation current density,and a higher oxygen vacancy diffusion coefficient in both dynamic and static potential polarization tests.This is attributed to the fact that the annealed Ti-B12,compared to the as-cast Ti-B12,has reduced hardness,refined grains,and eliminated microstructural defects.Meanwhile,the deformed Ti-B12 undergoes plastic deformation,leading to more dislocations,the formation ofβdeformation twins,and a small amount ofαprecipitation,resulting in increased microstructural hardness.Both annealing and deformation processes significantly alter the microstructure compared to the as-cast Ti-B12,demonstrating different corrosion behaviors than that of the as-cast Ti-B12.

关 键 词：钛合金 腐蚀行为 生物医用 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]