| 引用本文: | 陈菊,杨光,胡正晨,田振岐.Cr和Zn晶核对Cu/Ni复合体精密电沉积脱模的影响[J].材料科学与工艺,2024,32(6):26-34.DOI:10.11951/j.issn.1005-0299.20230120. |
| CHEN Ju,YANG Guang,HU Zhengchen,TIAN Zhenqi.Effect of Cr and Zn nuclei on demolding performance of Cu/Ni composite in precision electroforming[J].Materials Science and Technology,2024,32(6):26-34.DOI:10.11951/j.issn.1005-0299.20230120. |
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| 摘要: |
| 在模具表面喷涂K2Cr2O7是辅助电铸脱模的有效手段之一,然而六价Cr具有较强的致癌性。为了替代六价Cr钝化层,本文采用电沉积方法制备Cr晶核和Zn晶核,形成低毒三价Cr氧化物和无毒二价Zn钝化物防粘层替代六价Cr钝化层。利用计时电流法测试了沉积Cr和Zn晶核的电流-时间曲线,分析了三价Cr和二价Zn晶核在多晶Cu表面的形核特性；对Cu-Cr和Cu-Zn表面进行了SEM、EDS以及XPS测试,研究了电沉积三价Cr和二价Zn晶核后的表面形貌、表面元素组成及含量；对Cu、Cu-Cr和Cu-Zn表面进行了接触角测试,基于表面能理论计算了含三价Cr和二价Zn晶核多晶Cu的表面能。研究表明:三价Cr和二价Zn在Cu电极上的形核符合瞬态成核特性；三价Cr晶核在Cu表面上的分布比二价Zn晶核均匀且形状较为规整；三价Cr和二价Zn晶核在Cu表面均形成氧化物,Cr2O3的含量明显高于ZnO含量；多晶Cu、Cu-Cr和Cu-Zn的表面能大小依次为:多晶Cu>Cu-Zn>Cu-Cr,三价Cr和二价Zn氧化物辅助脱模后的Cu、Ni表面粗糙度相差57.14%和64.52%。因此,三价Cr氧化物可以更好地辅助Cu/Ni复合体顺利脱模。 |
| 关键词: 精密电沉积 表面能 表面钝化 脱模 表面粗糙度 |
| DOI：10.11951/j.issn.1005-0299.20230120 |
| 分类号:TG113 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(52175407). |
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| Effect of Cr and Zn nuclei on demolding performance of Cu/Ni composite in precision electroforming |
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CHEN Ju, YANG Guang, HU Zhengchen, TIAN Zhenqi
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(College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China) [HJ1.4mm]
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| Abstract: |
| Spraying K2Cr2O7 on the mould surface is one effective method to facilitate electroforming release. However, it is important to note that Cr6+ is known to be highly carcinogenic. In this paper, the electrodeposition method is used to prepare Cr nuclei and Zn nuclei as an alternative to the Cr6+ passivation layer to create a low-toxicity anti-adhesive layer consisting of Cr3+ oxides and non-toxic Zn2+ passivates. The current-time curves of Cr3+ and Zn2+ are measured by the chrono-current method. SEM, EDS and XPS tests are carried out on Cu-Cr and Cu-Zn surfaces to analyze the surface morphology, surface elemental composition and content after electrodeposition of Cr3+ and Zn2+ nuclei. Additionally, contact angle tests are carried out on Cu, Cu-Cr and Cu-Zn surfaces, and the surface energy of polycrystalline Cu with Cr3+ and Zn2+ nuclei was calculated based on surface energy theory. The rsearch shows that the nucleation of Cr3+ and Zn2+ at Cu electrodes is consistent with transient nucleation. The distribution of Cr3+ nuclei on the Cu surface is more uniform and has a more regular shape compared to Zn2+ nuclei. Moreover, Cr and Zn nuclei both form oxides on the Cu surface, and the content of Cr2O3 is significantly higher than that of ZnO. The surface energies of polycrystalline Cu, Cu-Cr and Cu-Zn are in the following order: polycrystalline Cu>Cu-Zn>Cu-Cr, and the difference in surface roughness between Cu and Ni after demolding with the assistance of Cr3+ and Zn2+ oxides are 57.14% and 64.52%, respectively. Therefore, trivalent Cr oxides are more effective in facilitating the smooth demolding of Cu/Ni composites. |
| Key words: precision electroforming surface energy surface passivation demolding surface roughness |
