摘要
本文采用大气等离子喷涂技术制备了不同Y_(3)Al_(5)O_(12)含量的YSZ@Y_(3)Al_(5)O_(12)/NiCrAlY热障涂层,研究了Y_(3)Al_(5)O_(12)对YSZ@Y_(3)Al_(5)O_(12)热障涂层的微观组织结构和高温相稳定性的影响。结果表明:等离子喷涂YSZ@Y_(3)Al_(5)O_(12)涂层呈典型的层状结构,Y_(3)Al_(5)O_(12)和YSZ交替沉积。随着Y_(3)Al_(5)O_(12)含量的升高,层与层之间的柱状晶结构逐渐消失。制备态的YSZ@Y_(3)Al_(5)O_(12)涂层主要含有c-ZrO_(2)晶相。1250℃下烧结50h后YSZ涂层发生了明显的相变,而1150℃和1250℃热处理后YSZ@Y_(3)Al_(5)O_(12)涂层含有相同的c-ZrO_(2)和Y_(3)Al_(5)O_(12)两种晶相,表明Y_(3)Al_(5)O_(12)可以改善YSZ的高温相稳定性。
YSZ@Y_(3)Al_(5)O_(12)/NiCrAlY thermal barrier coatings with different contents of Y_(3)Al_(5)O_(12) were prepared by air plasma spraying.The effect of Y_(3)Al_(5)O_(12) on microstructure and high-temperature phase stability of YSZ@Y_(3)Al_(5)O_(12) coatings were investigated.The results showed that the plasma-sprayed YSZ@Y_(3)Al_(5)O_(12) coating had a typical lamellar structure,and alternate deposition of YSZ and Y_(3)Al_(5)O_(12).With the increase of the content of Y_(3)Al_(5)O_(12),the columnar crystal structure between layers gradually disappeared.The as-deposited YSZ@Y_(3)Al_(5)O_(12)coatings were mainly composed of c-ZrO_(2) phase.After sintering at 1250℃for 50h,YSZ coating had obvious phase transformation,while YSZ@Y_(3)Al_(5)O_(12) coating contained two crystal phases of c-ZrO_(2) and Y_(3)Al_(5)O_(12) after heat-treatment at 1150℃ and 1250℃,indicating that Y_(3)Al_(5)O_(12) could improve the high-temperature phase stability of YSZ.
作者
梁和平
王鑫
薛召露
张鑫
汪榆海
钱立宏
张世宏
Liang Heping;Wang Xin;Xue Zhaolu;Zhang Xin;Wang Yuhai;Qian Lihong;Zhang Shihong(Y&C Engine Co.,Ltd.,Wuhu 241080;Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Education,Anhui University of Technology,Ma'anshan 243002;BGRIMM Technology Group,Beijing 100160)
出处
《热喷涂技术》
2021年第1期43-52,共10页
Thermal Spray Technology
基金
国家重点研发计划(2019YFE0107500)
安徽省自然科学基金(1908085QE219)
安徽省重点研究与开发计划(201904a05020010)。
