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| La2Zr2O7/YSZ梯度热障涂层的热冲击失效行为 |
| Thermal Shock Failure Behavior of La2Zr2O7/YSZ Gradient Thermal Barrier Coatings |
| 投稿时间：2018-11-14 |
| DOI：10.16018/j.cnki.cn32-1650/n.201902001 |
| 中文关键词: 热障涂层 等效保温 涂层失效 |
| 英文关键词: thermal barrier coating equivalent insulation coating failure |
| 基金项目: |
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| 中文摘要: |
| 隔热性能是热障涂层对基体热保护功能最直接的衡量标准。制备La2Zr2O7(LZO)/ YSZ 梯度热障涂层(DCL-TBCs)，在1 300 ℃的顶部涂层表面温度下与500 μm厚的YSZ TBC进行热梯度循环试验，评估它们的寿命。分析试验结果表明，当厚度为100 μm和200 μm的YSZ涂层被LZO涂层替代时，DCL-TBCs的寿命会比500 μm厚的YSZ TBC高出一倍多。证明DCL-TBCs技术可在较高温度下有效延长涂层的使用寿命。 |
| 英文摘要: |
| Thermal insulation performance is the most direct measure of thermal protection function of thermal barrier coating to substrate. La2Zr2O7(LZO)/YSZ gradient thermal barrier coatings(DCL-TBCs)were prepared, and thermal gradient cycling tests were carried out with YSZ TBC 500 micron thick at 1 300 C top coating surface temperature to evaluate their life. Analytical test results show that when YSZ coatings with thicknesses of 100 and 200 microns are replaced by LZO coatings, the lifetime of DCL-TBCs is more than double that of 500 micron thick YSZ TBC. It is proved that DCL-TBCs technology can effectively prolong the service life of coatings at higher temperatures. |
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