| 摘要: |
| 采用电泳沉积法以硝酸铝和硝酸钇为溶胶原料，在溶胶制备过程中加入钇稳氧化锆（YSZ），然后利用电泳沉积和热压滤烧结相结合方法在32Cr2MoV钢表面制备氧化铝和氧化锆涂层。用扫描电子显微镜（SEM）对涂层表面及界面形貌进行观察，利用X射线衍射仪（XRD）对涂层物相组成进行分析，采用热循环氧化试验研究涂层对基体在900 ℃空气中高温氧化行为的影响。结果表明，利用电泳沉积法在32Cr2MoV钢表面制备了一层致密陶瓷涂层，经热压滤烧结后涂层由表层αAl2O3和ZrO2、次表层Fe的氧化物以及靠近基体的Fe、Mo、Cr氧化物层组成，经900 ℃热循环氧化试验表明，陶瓷复合涂层对基体32Cr2MoV钢起到了一定的抗氧化保护作用。 |
| 关键词: 电泳沉积法 Al2O3ZrO2复合涂层 热循环氧化 32Cr2MoV钢 |
| DOI： |
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| Electrophoretic Deposition of Alumina and Zirconia Coating on the Surface of 32Cr2MoV Steel |
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ZHANG Jin, GUO Haiming, LI Hong, HE Yedong
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（Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, University of Science and Technology Beijing, Beijing 100083）
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| Abstract: |
| Aluminum nitrate and yttrium nitrate as raw materials for electrophoretic deposition, Yttrium stabilized zirconia (YSZ) was added during preparation of solgel, and the composite coating with alumina and zirconia was prepared using electrophoretic deposition and hotpress techniques on the surface of 32Cr2MoV steel. Scanning electron microscopy (SEM) was used to exam the coating and interface morphology. The phase of composite coating was characterized by Xray diffraction. The influence of composite coating on the substrate at a temperature of 900 ℃ in air was analyzed using thermal cyclic oxidation. Results show that a compact coating on 32Cr2MoV steel can be obtained by electrophoretic deposition and hotpress techniques. The composite coating is mainly composed of outer αAl2O3 and ZrO2, middle iron oxides coating and inner iron molybdenum chromium oxides coating that protect the substrate not to be oxidized by thermal cyclic oxidation at 900 ℃ so quickly compared with steel without any coating. |
| Key words: solgel method Al2O3ZrO2 composite coating thermal cyclic oxidation 32Cr2MoV steel |
