Thermal spray coating of aluminum nitride utilizing the detonation spray technique
Thermal spray coating of aluminum nitride utilizing the detonation spray technique
复制标题
利用爆炸喷涂技术对氮化铝进行热喷涂
DOI：
10.1557/jmr.2002.0366
复制
发表时间：
2002
影响因子：
2.7
通讯作者：
G. Sundararajan
中科院分区：
文献类型：
--
作者：
L. Krishna;D. Sen;Y. S. Rao;G. Rao;G. Sundararajan
这项工作的主要目的是研究沉积氮化铝（AlN）粉末的可行性，合成使用自蔓延高温合成，在低碳钢基体上使用爆炸喷涂技术。通过利用AlN粉末产生的厚涂层在四个不同的氧-乙炔比，并分析了显微组织，显微硬度，孔隙率，压痕断裂韧性，和相分布。发现AlN粉末颗粒在沉积过程中发生氧化。研究了喷涂工艺参数与涂层过程中氮化铝氧化程度之间的相互关系。采用干砂磨损试验和销盘滑动磨损试验对涂层的摩擦学性能进行了评价。并与纯Al_2O_3涂层进行了力学性能和摩擦学性能的比较。涂层的结构和它们的摩擦学性能之间的相关性也被建立。
The main objective of this work is to examine the feasibility of depositing aluminum nitride (AlN) powders, synthesized using self-propagating high-temperature synthesis, on a mild steel substrate using the detonation spray coating technique. Thick coatings produced by utilizing the AlN powder were obtained at four different oxygen–acetylene ratios and analyzed for microstructure, microhardness, porosity, indentation fracture toughness, and phase distribution. The AlN powder particles were found to be undergoing oxidation during the deposition process. The interrelationship between the spray parameters and the extent of oxidation of AlN during the coating process was investigated. Tribological performance of the coatings was evaluated using a dry sand abrasion test and a pin-on-disc sliding wear test. The mechanical and tribological properties of the above four coatings were compared with pure alumina (Al_2O_3) coatings. The correlation between the structure of the coatings and their tribological performance was also established.