激光选区熔化成形Ti-5%TiN复合材料在Hank溶液中的电化学腐蚀性能 
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Electrochemical Corrosion Properties of Ti-5%TiN Composites Formed by Selective Laser Melting in Hank''''s Solution
天津工业大学物理科学与技术学院激光技术研究所, 天津 300387
图 & 表
图 1. 激光选区熔化成形CP-Ti和Ti-5%TiN样品的宏观图片
Fig. 1. Macro picture of SLM-produced CP-Ti and Ti-5%TiN
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图 2. 激光选区熔化成形CP-Ti和Ti-5%TiN的显微组织。(a) CP-Ti内的针状α'相;(b) Ti-5%TiN内的针状α'相;(c) Ti-5%TiN内未熔化的TiN颗粒和针状α';(d)未熔化的TiN颗粒放大图和EDS数据
Fig. 2. Microstructures of SLM-produced CP-Ti and Ti-5% TiN. (a) Acicular α'-phase in CP-Ti; (b) acicular α'-phase in Ti- 5%TiN; (c) unmelted TiN particles and acicular α'-phase in Ti-5% TiN; (d) magnified image of unmelted TiN particle and EDS data
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图 3. 两种样品的X射线衍射图。(a) CP-Ti; (b) Ti-5%TiN
Fig. 3. XRD patterns of two samples. (a) CP-Ti; (b) Ti-5% TiN
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图 4. 激光选区熔化成形CP-Ti和Ti-5%TiN在Hank溶液中的极化曲线
Fig. 4. Polarization curves of SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution
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图 5. 激光选区熔化成形CP-Ti和Ti-5%TiN在Hank溶液中的电化学交流阻抗谱。(a)奈奎斯特图;(b)(c)波特图;(d)等效电路图
Fig. 5. Electrochemical impedancespectra of SLM-produced CP-Ti and Ti-5%TiN in Hank's solution. (a) Nyquist plot; (b)(c) bode plots; (d) equivalent circuit
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图 6. 两种样品电化学腐蚀后的形貌及EDS结果。(a) CP-Ti腐蚀形貌;(b) Ti-5%TiN腐蚀形貌;(c) Ti-5%TiN的EDS线扫描图谱;(d)点H处的EDS图谱
Fig. 6. Morphologies and EDS results of two samples after electrochemical corrosion. (a) Corrosion morphology of CP-Ti; (b) corrosion morphology of Ti-5%TiN; (c) EDS line scanning result of Ti-5% TiN; (d) EDS pattern of point H
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图 7. 样品表面钝化膜的XPS光谱。(a)激光选区熔化CP-Ti和Ti-5%TiN的全扫描谱;(b) CP-Ti的Ti2p光谱;(c) CP-Ti的O1s光谱;(d) Ti-5%TiN的Ti2p光谱;(e) Ti-5%TiN的O1s光谱
Fig. 7. XPS spectra of passive film on surface of samples. (a) Whole scan spectrum of SLM-produced CP-Ti and Ti-5%TiN; (b) Ti2p spectrum of CP-Ti;(c) O1s spectrum of CP-Ti; (d) Ti2p spectrum of Ti-5%TiN; (e) O1s spectrum of Ti-5%TiN
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表 1激光选区熔化成形CP-Ti和Ti-5%TiN的电化学腐蚀参数
Table1. Electrochemical corrosion parameters of SLM-produced CP-Ti and Ti-5%TiN
| Sample | ip /(μA·cm-2) | Ecorr /V | ΔE /V | Rp /(Ω·cm2) | lgβc | lgβa | jcorr /(μA·cm-2) |
|---|
| CP-Ti | 0.49 | -0.64 | 0.51 | 139869 | 3.698 | 4.441 | 6.26 | | Ti-5%TiN | 0.40 | -0.65 | 0.65 | 160240 | 4.556 | 4.142 | 5.88 |
|
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表 2激光选区熔化成形CP-Ti和Ti-5%TiN在Hank溶液中的EIS拟合结果
Table2. Fitting results of EIS for SLM-produced CP-Ti and Ti-5%TiN in Hank's solution
| Sample | Rs /(Ω·cm2) | CPE1 /(μΩ-1·cm-2·S-n) | n1 | Rct /(MΩ·cm2) | CPE2 /(μΩ-1·cm-2·S-n) | n2 | Rf /(Ω·cm2) | χ2 /10-4 |
|---|
| CP-Ti | 65.29 | 6.27 | 0.922 | 0.26 | 2.51 | 0.991 | 273.3 | 0.72 | | Ti-5%TiN | 10.91 | 4.48 | 0.919 | 5.02 | 2.80 | 0.913 | 419.1 | 1.46 |
|
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表 3激光选区熔化成形CP-Ti和Ti-5%TiN在Hank溶液中形成钝化膜的XPS结果
Table3. XPS of passive film formed on SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution
| Specimen | L-S coupling state | Peak position /eV | w1/2 /eV | Separation energy /eV | Source |
|---|
| Ti2p3/2 | 459.12 | 1.36 | 5.76 | TiO2 | | CP-Ti | Ti2p1/2 | 464.88 | 2.34 | - | - | | O1s | 530.54 | 1.11 | Null | O2- of TiO2 | | | 531.52 | 2.46 | - | —OH- | | Ti2p3/2 | 459.00 | 1.36 | 5.69 | TiO2 | | Ti-5%TiN | Ti2p1/2 | 464.69 | 2.28 | - | - | | O1s | 530.52 | 1.33 | Null | O2- of TiO2 | | | 531.59 | 2.68 | - | —OH- |
|
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赵宇, 宋振明, 金剑波, 谢敏, 赵淑珍, 周圣丰. 激光选区熔化成形Ti-5%TiN复合材料在Hank溶液中的电化学腐蚀性能[J]. 中国激光, 2019, 46(9): 0902005. Zhao Yu, Song Zhenming, Jin Jianbo, Xie Min, Zhao Shuzhen, Zhou Shengfeng. Electrochemical Corrosion Properties of Ti-5%TiN Composites Formed by Selective Laser Melting in Hank''''s Solution[J]. Chinese Journal of Lasers, 2019, 46(9): 0902005.
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