Microstructure and Properties of Air Plasma Sprayed Sm2Zr2O7 Coatings
Source abstract
Abstract
稀土锆酸盐材料具有比Y 2 O 3 部分稳定ZrO 2 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Sm 2 Zr 2 O 7 粉体制备涂层, 并在相同条件下沉积8wt%Y 2 O 3 稳定ZrO 2 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Sm 2 Zr 2 O 7 涂层为缺陷萤石结构. 扫描电镜分析显示, Sm 2 Zr 2 O 7 和8wt%Y 2 O 3 稳定ZrO 2 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 Sm 2 Zr 2 O 7 涂层的热导率为0.44 W/(mK), 比相同条件下测得的8wt%Y 2 O 3 稳定ZrO 2 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, Sm 2 Zr 2 O 7 涂层的抗折强度、硬度和弹性模量均低于8wt%Y 2 O 3 稳定ZrO 2 涂层.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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