| 引用本文: | 冯超超,李丽,赵玉刚,白雪,崔程,张岩.磁力搅拌电火花加工工艺对镍钛合金表面特征及疏水性的影响[J].中国表面工程,2019,32(2):120~127 |
| FENG Chaochao,LI Li,ZHAO Yugang,BAI Xue,CUI Cheng,ZHANG Yan.Effects of Magnetic Mixed EDM on Surface Characteristics and Hydrophobicity of Ni-Ti Alloy[J].China Surface Engineering,2019,32(2):120~127 |
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| 摘要: |
| 采用磁力搅拌电火花加工工艺在镍钛合金表面制备疏水性表面来提高其生物相容性，研究工艺参数对表面特征及疏水性的影响。采用扫描电子显微镜（SEM）对工件表面形貌进行分析，使用光学接触角测量仪和TR200粗糙度仪分别测量接触角和表面粗糙度值。结果表明：磁力搅拌电火花加工参数对表面形貌特征及疏水性影响显著。当电流为1.5 A时，表面熔凝凸起随脉宽的增大而增大，在脉宽为60 μs时其表面含有尺寸合适的熔凝凸起，接触角达到峰值为138.2°；当电流为4.5 A时，表面富含气孔特征，表面气孔的深度在脉宽为60 μs时达到最大值，其表面接触角为133.6°。表面粗糙度对疏水性能无直接影响。采用磁力搅拌电火花加工工艺，可以大幅提升镍钛合金表面的疏水性。 |
| 关键词: 电火花 磁力搅拌 镍钛合金 多孔 疏水性 |
| DOI：10.11933/j.issn.1007-9289.20181109001 |
| 分类号:TG174.44 |
| 基金项目:国家自然科学基金（51775321）；山东省自然科学基金（ZR2018MEE025） |
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| Effects of Magnetic Mixed EDM on Surface Characteristics and Hydrophobicity of Ni-Ti Alloy |
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FENG Chaochao, LI Li, ZHAO Yugang, BAI Xue, CUI Cheng, ZHANG Yan
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School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
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| Abstract: |
| The hydrophobic surface of Ni-Ti alloy was prepared by magnetic mixed electrical discharge machining (EDM) to improve its biocompatibility. The influence of the processing parameters on the surface characteristics and hydrophobicity were studied, respectively. The surface morphology of the workpiece was analyzed by scanning electron microscopy (SEM). The contact angle and surface roughness were measured by optical contact angle measuring instrument and TR200 roughness meter, respectively. The results show that the parameters of magnetic mixed EDM have significant influence on the surface morphology and hydrophobicity. When the current is 1.5 A, the solidification bulges on the surface increases with the increase of the pulse duration. When the pulse duration is 60 μs, the surface contains a suitable size of the solidification bulges and the contact angle reaches a peak value of 138.2°. When the current is 4.5 A, the surface is rich in stomatal characteristics and the depth of the pore reaches the maximum at the pulse duration of 60 μs with the contact angle is 133.6°. The surface roughness has no direct effect on hydrophobicity. The hydrophobicity of the Ni-Ti alloy surface is greatly improved by using the magnetic mixed EDM process. |
| Key words: electrical discharge machining (EDM) magnetic mixed NiTi alloy porous hydrophobic |
