NiCrFeAl/h-BN·SiO_(2)可磨耗封严涂层抗冲刷性能研究  

Anti-Erosion Performance of NiCrFeAl/h-BN·SiO_(2) Abradable Sealing Coatings

作　　者：栾胜家[1] 高明浩 徐娜[1] 常辉 王远鸿 周恬伊 张甲[1] 侯万良[1] 常新春[1] Luan Shengjia;Gao Minghao;Xu Na;Chang Hui;Wang Yuanhong;Zhou Tianyi;Zhang Jia;Hou Wanliang;Chang Xinchun(Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016

出　　处：《稀有金属材料与工程》2022年第6期2115-2121,共7页Rare Metal Materials and Engineering

基　　金：装备预研(6142703190303)。

摘　　要：利用METCO 6P-Ⅱ火焰喷涂制备NiCrFeAl/h-BN·SiO_(2)可磨耗封严涂层,采用SiO_(2)对NiCrFeAl/h-BN进行改性,改善涂层的可磨耗性。采用不同氧气/乙炔流量比(氧燃比)制备可磨耗封严涂层,并对涂层抗冲刷性能进行评价。结果显示:NiCrFeAl在喷涂过程中熔化并包覆h-BN和SiO_(2)粒子;随氧燃比的升高,金属相熔化更加充分,h-BN和SiO_(2)粒子在涂层中分布的均匀性提高,涂层表面洛氏硬度(HR15Y)由50.8提高到70.3,结合强度升高;涂层冲刷后形貌表现出粘着磨损和磨粒磨损特征,冲刷表面粗糙度随氧燃比升高而降低,金属相对非金属相的充分包裹提高了涂层的内聚力,涂层质量损失降低,抗冲刷性能提高。NiCrFeAl/h-BN·SiO_(2) abradable sealing coatings were prepared by METCO 6P-Ⅱ flame spraying,and NiCrFeAl/h-BN was modified by SiO_(2) to improve the abradability of the coatings.The anti-erosion performance of the abradable sealing coatings prepared with different flow-ratios of oxygen and acetylene(oxygen fuel ratio)were evaluated.The results show that the h-BN and SiO_(2) particles are coated by NiCrFeAl during the spraying process.With the increase of oxygen fuel ratio,the metal phase is melted more adequately,and the uniformity of h-BN and SiO_(2) is improved.The surface Rockwell hardness(HR15Y)of the coating is raised from 50.8 to 70.3,and the bonding strength is enhanced.The morphologies of the eroded coatings were characterized by adhesive wear and abrasive wear,and the roughness decreases with the increase of the oxygen fuel ratio.The cohesive force of the coating is promoted deriving from that the nonmetallic phases are coated by metal phase adequately.The mass loss rate of the coating decreases,and the anti-erosion performance is improved.

关 键 词：NiCrFeAl/h-BN·SiO_(2) 封严涂层 抗冲刷 火焰喷涂 

分 类 号：TG174.442.4[金属学及工艺—金属表面处理]