| 大气等离子体喷涂Sm2Zr2O7涂层的结构和性能 |
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| 引用本文： | 于建华,赵华玉,周霞明,陶顺衍,丁传贤.大气等离子体喷涂Sm2Zr2O7涂层的结构和性能[J].无机材料学报,2011(7):696-700. |
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| 作者姓名： | 于建华 赵华玉 周霞明 陶顺衍 丁传贤 |
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| 作者单位： | 中国科学院特种无机涂层重点实验室;中国科学院上海硅酸盐研究所; |
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| 摘 要： | 稀土锆酸盐材料具有比Y2O3部分稳定ZrO2陶瓷低的热导率,是新型热障涂层的潜在候选材料之一.利用大气等离子体喷涂技术以喷雾造粒的Sm2Zr2O7粉体制备涂层,并在相同条件下沉积8wt%Y2O3稳定ZrO2涂层.对比评价了两种涂层的结构、热物理性能和力学性能.X射线衍射结果表明,制备态Sm2Zr2O7涂层为缺陷萤石结构.扫描电镜分析显示,Sm2Zr2O7和8wt%Y2O3稳定ZrO2涂层为典型的层状结构,内部有很多气孔、裂纹等缺陷.800℃测得的Sm2Zr2O7涂层的热导率为0.44 W/(m.K),比相同条件下测得的8wt%Y2O3稳定ZrO2涂层的热导率低~40%,两者的热膨胀系数相似.力学测试结果显示,Sm2Zr2O7涂层的抗折强度、硬度和弹性模量均低于8wt%Y2O3稳定ZrO2涂层.
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| 关 键 词： | 等离子体喷涂 Sm2Zr2O7涂层 热导率 力学性能 |
Microstructure and Properties of Air Plasma Sprayed Sm_2Zr_2O_7 Coatings |
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| YU Jian-Hua,ZHAO Hua-Yu,ZHOU Xia-Ming,TAO Shun-Yan,DING Chuan-Xian.Microstructure and Properties of Air Plasma Sprayed Sm_2Zr_2O_7 Coatings[J].Journal of Inorganic Materials,2011(7):696-700. |
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| Authors: | YU Jian-Hua ZHAO Hua-Yu ZHOU Xia-Ming TAO Shun-Yan DING Chuan-Xian |
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| Affiliation: | YU Jian-Hua1,2,ZHAO Hua-Yu1,ZHOU Xia-Ming1,TAO Shun-Yan1,DING Chuan-Xian1,2(1.Key Laboratory of Inorganic Coating Materials,Chinese Academy of Sciences,Shanghai 200050,China,2.Shanghai Insti-tute of Ceramics,China) |
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| Abstract: | Rare-earth zirconates with a pyrochlore structure have attracted great attention for potential application in thermal barrier coating systems.In the present work,Sm2Zr2O7 coatings were deposited by atmospheric plasma spraying technology.Their microstructure,thermo-physical and mechanical properties were examined,and com-pared with that of 8wt% Y2O3 stabilized ZrO2 coatings which was deposited under the same plasma spraying condi-tions.X-ray diffraction result shows that the as-sprayed Sm2Zr2O7 coating exhib... |
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| Keywords: | plasma spraying Sm2Zr2O7 coating thermal conductivity mechanical property |
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