摘要
为了研究服役过程中38CaO-5MgO-8AlO_(1.5)-49SiO_(2)(CMAS)对镁基六铝酸镧(LaMgAl_(11)O_(19))的高温侵蚀行为,利用大气等离子喷涂技术制备了LaMgAl_(11)O_(19)涂层。通过SEM、EDS和XRD表征了1050、1250℃下LaMgAl11O19涂层被CMAS侵蚀后的微观组织和相结构。结果表明,LaMgAl_(11)O_(19)涂层中在1250℃被侵蚀24 h后的腐蚀产物是CaAl_(2)Si_(2)O_(8)和MgAl_(2)O_(4)。此外,通过研究侵蚀层厚度与侵蚀温度、侵蚀时间的关系,计算得到了在1050~1250℃温度下,CMAS侵蚀LaMgAl11O19涂层的反应活化能为94.1 kJ/mol。
The LaMgAl_(11)O_(19)was prepared by air plasma spraying technology to investigate the corrosion behavior of 38CaO-5MgO-8AlO_(1.5)-49SiO_(2)(CMAS)at high temperature.The microstructure,element distribution and phase composition of LaMgAl_(11)O_(19)coating before and after CMAS corrosion at 1050 and 1250℃were investigated by SEM,EDS and XRD.The results show that CaAl2Si2O8 and MgAl2O4 can be observed in LaMgAl_(11)O_(19)coating after corroded at 1250℃for 24 h.Besides,according to the thickness of corroded zone in LaMgAl_(11)O_(19)coating,the apparent activation energy in the temperature range of 1050~1250℃is 94.1 kJ/mol.
作者
王亚军
马欣新
马瑞
唐光泽
刘玲
Wang Yajun;Ma Xinxin;Ma Rui;Tang Guangze;Liu Ling(School of Material Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Beijing Power Machinery Institute,Beijing 100074,China;State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;School of Materials Science and Engineering,Beijing institute of Technology,Beijing 100081,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2021年第8期2927-2932,共6页
Rare Metal Materials and Engineering
