宋闪光,王伟,谭世磊,王莉莉.稀土掺杂Nd2O3 对YSZ/(Ni,Al)复合涂层组织与性能的影响[J].表面技术,2016,45(10):49-55.
SONG Shan-guang,WANG Wei,TAN Shi-lei,WANG Li-li.Effect of Rare Earth Doped with Nd2O3 on Microstructure and Properties of YSZ/(Ni, Al) Composite Coatings[J].Surface Technology,2016,45(10):49-55 |
| 稀土掺杂Nd2O3 对YSZ/(Ni,Al)复合涂层组织与性能的影响 |
| Effect of Rare Earth Doped with Nd2O3 on Microstructure and Properties of YSZ/(Ni, Al) Composite Coatings |
| 投稿时间：2016-03-26 修订日期：2016-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.10.008 |
| 中文关键词: 抗高温氧化 结合强度 氧化钕 稀土掺杂 自愈合 热障涂层 |
| 英文关键词:oxidation resistance adhesion strength Nd2O3 doped with rare earth self-healing thermal barrier coating |
| 基金项目: |
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| Author | Institution |
| SONG Shan-guang | School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
| WANG Wei | School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
| TAN Shi-lei | School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
| WANG Li-li | School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
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| 中文摘要: |
| 目的 提高YSZ/(Al,Ni)复合涂层与基体的结合强度和抗高温氧化性。方法 采用电泳沉积方法在Inconel600 高温合金表面沉积YSZ/(Al,Ni)复合涂层和掺杂稀土Nd2O3-YSZ/(Al,Ni)（N-YSZ/(Al,Ni)）复合涂层，然后进行真空烧结，最后对制备好的热障复合涂层进行划痕实验和等温循环氧化实验。通过对样品进行等温循环氧化实验，获取不同氧化时间段的复合涂层样品，并通过采用SEM 和XRD 分别对复合涂层形貌和微观结构进行分析。结果 在1100 ℃等温氧化过程中，未掺杂稀土元素复合涂层的氧化增重速率为0.0057 mg/cm2，而掺杂钕元素的复合涂层的氧化增重速率为0.0046 mg/cm2，比未掺杂稀土YSZ/(Al,Ni)复合涂层低。N-YSZ/(Al,Ni)热障复合涂层在等温氧化过程中颗粒较小，裂纹少，表面更加致密，并且发生自愈合现象。真空烧结后的YSZ/(Al,Ni)复合涂层和N-YSZ/(Al,Ni)复合涂层与基体的结合强度大约为4.0 N，在经过氧化100 h 后，掺杂稀土的N-YSZ/(Al,Ni)复合涂层的结合强度为3.26 N，未掺杂稀土钕元素YSZ/(Al,Ni)复合涂层与基体的结合强度为2.6 N。N-YSZ/(Al,Ni)热障复合涂层中存在Nd2Zr2O7 相和稳定的NiAl2O4 相，Nd2Zr2O7 相具有良好的稳定性以及耐高温氧化性。结论 掺杂稀土氧化钕N-YSZ/(Al,Ni)复合涂层，在1100 ℃、空气氛围下等温氧化过程中发生自愈合现象。随着氧化时间的增加，掺杂稀土元素钕的N-YSZ/(Al,Ni)复合涂层表面的颗粒趋于均匀化，裂纹明显变少，使得涂层更加致密和平整。掺杂了稀土钕元素的N-YSZ/(Al,Ni)复合涂层与基体之间具有更高的结合强度。在1100 ℃、空气氛围下等温氧化100 h 时，掺杂了稀土钕元素的N-YSZ/(Al,Ni)复合涂层与基体的结合强度明显大于YSZ/(Al,Ni)复合涂层，提高了N-YSZ/(Al,Ni)复合涂层的抗剥落性和服役寿命。在1100 ℃、空气氛围下等温氧化过程中，掺杂稀土元素钕的N-YSZ/(Al,Ni)复合涂层的抗高温氧化性能比未掺杂稀土元素的YSZ/(Al,Ni)复合涂层的抗高温氧化性能显著提高。 |
| 英文摘要: |
| The work aims to improve the adhesion strength and high temperature oxidation resistance of YSZ/(Al, Ni) composite coatings. YSZ/(Al, Ni) composite coatings were deposited on Inconel600 superalloy doped with rare earth Nd2O3-YSZ/(Al,Ni) (N-YSZ/(Al,Ni)) composite coatings with the electrophoretic deposition (EPD) technique, followed by vacuum sintering. Finally, the well-prepared thermal barrier composite coatings received the wounding healing tests and the isothermal cycling oxidation experiments. Through isothermal cycling oxidation experiments on the samples, composite coating samples in different oxidation periods were obtained and the morphology and microstructure of the composite coatings were respectively analyzed by means of SEM and XRD. In the process of isothermal oxidation at 1,100 ℃, the oxidation weight increase velocity of the composite coatings non-doped with the rare earth element and that of the composite coatings doped with neodymium were respectively 0.0057 mg/cm2 and 0.0046 mg/cm2. The latter oxidation weight increase velocity was lower than that non-doped with the composite coatings of rare earth YSZ/(Al, Ni). The grains of N-YSZ/(Al, Ni) thermal barrier composite coatings were small and had less cracks, with denser surface in the process of isothermal oxidation, during which the self-healing occurred. After vacuum sintering, the adhesion strength of YSZ/(Al, Ni) and N-YSZ/(Al, Ni) composite coatings with the matrix was about 4.0 N. After oxidation for 100 h, the adhesion strength of N-YSZ/(Al,Ni) composite coatings doped with rare earth and the adhesion strength of YSZ/(Al, Ni) composite coatings non-doped with rare earth neodymium with the matrix were respectively 3.26 N and 2.6 N. N-YSZ/(Al, Ni) thermal barrier composite coatings had Nd2Zr2O7 and stable Ni- Al2O4 phases, and Nd2Zr2O7 phase had a good stability and high temperature oxidation-resistance. Self-healing phenomenon occurred when N-YSZ/(Al,Ni) composite coatings doped with the rare earth neodymium oxide in the process of isothermal oxidation in air at 1,100 ℃. With the increase of oxidation time, the particles on the N-YSZ/(Al, Ni) composite coatings doped with rare earth element neodymium tend to be homogenized, apparently with less cracks, which enable the coatings to be denser and smoother. The adhesion strength between N-YSZ/(Al,Ni) composite coatings doped with rare earth element neodymium and the matrix is higher. In the process of isothermal oxidation in air at 1,100 ℃, the adhesion strength between the N-YSZ/(Al,Ni) composite coatings doped with the rare earth element neodymium and the matrix is significantly larger than that of the YSZ/(Al,Ni) composite coatings, which improves the spalling resistance and service life of the N-YSZ/(Al,Ni) composite coatings. In the process of isothermal oxidation in air at 1,100 ℃, compared with YSZ/(Al,Ni) composite coatings non-doped with rare earth element, N-YSZ/(Al,Ni) composite coatings doped with earth element neodymium more significantly improves the oxidation resistance. |
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