Influence of Feedstock Powder Microstructure on the Fabrication of Yttria Coating by Cold Spray
Influence of Feedstock Powder Microstructure on the Fabrication of Yttria Coating by Cold Spray
复制标题
原料粉末微观结构对冷喷涂氧化钇涂层的影响
DOI：
10.11330/jtss.56.149
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
福本 昌宏
中科院分区：
文献类型：
--
作者：
山田 基宏;森 誉秀;福本 昌宏
冷喷涂已发展成为一种高质量的金属涂层工艺。另一方面，冷喷涂陶瓷材料仍然很困难，因为缺乏这一过程所需的延展性。目前已有几种通过该工艺制备陶瓷涂层的报道。然而，冷喷涂陶瓷材料的沉积机理尚不清楚。本研究旨在阐明原料粉末材料的微观结构对冷喷涂形成厚陶瓷涂层的重要性。制备了不同比表面积的氧化钇粉末，并将其冷喷涂到铝合金表面。此外，还仔细观察了原料粉末材料的微观结构。结果表明，较高的比表面积有利于冷喷涂陶瓷颗粒的沉积，有利于获得较厚的涂层。凝聚的具有高比表面积和多孔结构的细小一次颗粒是实现冷喷涂制备厚陶瓷涂层的最重要因素。
Cold spraying has been developed as a high-quality metallic coating process. On the other hand, cold spraying of ceramic material is still difficult due to a lack of its ductility which is required for this process. There are several reports to fabricate ceramic coatings through this process. However, the deposition mechanism of cold-sprayed ceramic material has not yet been clarified. This study aims to clarify the importance of the microstructure of feedstock powder material on the formation of thick ceramic coating through cold spray process. Yttria powders with different specific surface area were prepared and coldsprayed onto aluminum alloy substrate. Furthermore, the microstructure of feedstock powder materials was carefully observed. The results revealed that the higher specific surface area enhanced the deposition of cold-sprayed ceramic particles and enabled to fabricate thick coatings. Fine primary particles agglomerated with high specific surface area and porous structure can be the most important factor to realize the fabrication of thick ceramic coatings by cold spray.