等离子喷涂YSZ涂层瞬态超高温冲蚀性能研究  

Transient Ultra-high Temperature Erosion Resistance of Plasma Spray YSZ Coatings

作　　者：崔永静[1] 陆峰[1] 高俊国[1] 张欢欢[1] 

机构地区：[1]中国航空工业集团公司北京航空材料研究院,北京100095

出　　处：《装备环境工程》2016年第3期31-36,共6页Equipment Environmental Engineering

摘　　要：目的研究等离子喷涂YSZ涂层的瞬态超高温烧蚀性能。方法借助超音速火焰喷涂设备实现超高温高速火焰,对等离子喷涂YSZ涂层进行瞬态冲蚀,通过火焰中加送氧化铝颗粒模拟对涂层的高温冲刷。采用常规手段评价涂层的抗瞬态超高温冲蚀性能,并对冲蚀部位进行微观观察,探讨涂层的失效机理。结果在3000 K、不添加砂粒的条件下,火焰冲击3 s后钢基体材料表面发生沸腾;喷涂0.6 mm YSZ的试样在火焰冲击60 s后涂层完好。在3000 K、添加砂粒的条件下,火焰冲击3 s后钢基体材料被冲刷出约1.0 mm深坑;喷涂0.6 mm YSZ试样的涂层被火焰冲刷剥落,但基体未受明显损伤;喷涂1 mm YSZ的试样,试验后仍保留部分涂层。结论在3000 K高温瞬态冲蚀条件下,热喷涂1 mm厚YSZ涂层可对材料表面形成有效防护。Objective To study the transient ultra-high temperature erosion resistance of plasma spray YSZ coatings. Methods The transient ultra-high temperature erosion test on APS YSZ coating was carried out with high temperature and high speed flame generated high velocity oxygen fuel spraying equipment, and the impaction was simulated by feeding the alumina particles. Then the transient ultra-high temperature erosion resistance of coating was evaluated by conventional means. The failure mechanism of the coating was investigated according to the microscopic analysis. Results Under the test condition of 3000 K and no particle addition, the steel substrate boiled after 3 s of flame erosion, while the YSZ coating with 0.6 mm thickness was integral after 60 s of flame erosion. Under the test condition of 3000 K and particles addition, the steel substrate was impacted to generate about 1 mm deep pits after 3 s of flame erosion, the YSZ coating with 0.6 mm thickness was peeled off without substrate damage, and the YSZ coating with 1.0 mm thickness was still partially retained. Conclusion APS YSZ coating with 1.0 mm thickness could protect the substrate effectively from the transient ultra-high temperature erosion at up to 3000 K.

关 键 词：瞬态超高温 YSZ涂层 冲蚀性能 超音速火焰喷涂 

分 类 号：TJ7[兵器科学与技术—武器系统与运用工程] TG174.44[金属学及工艺—金属表面处理]