Mechanisms of La2Ce2O7/YSZ Double-Ceramic-Layer Thermal Barrier Coatings against Volcanic Ash Corrosion

被引：0

作者：

Xia, Jie ^{[1
]}

Du, Xuelin ^{[1
]}

Xiao, Yiqi ^{[2
]}

Zhang, Ling ^{[3
]}

Wu, Rudder Tse ^{[4
]}

Matsushita, Yoshitaka ^{[5
]}

机构：

[1] Hunan Inst Technol, Dept Mech Engn, Hengyang 421002, Peoples R China

[2] Hunan Inst Engn, Dept Mech Engn, Xiangtan 411104, Peoples R China

[3] Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys MOE, Chongqing 400044, Peoples R China

[4] Natl Inst Mat Sci, High Temp Mat Grp, 1 2 1 Sengen, Tsukuba, Ibaraki 3050044, Japan

[5] Natl Inst Mat Sci, Chem Anal & Xray Diffract Grp, 1 2 1 Sengen, Tsukuba, Ibaraki 3050044, Japan

来源：

COATINGS | 2024年 / 14卷 / 07期

关键词：

thermal barrier coating; calcium-magnesium-alumina-silicate (CMAS); volcanic ash; La2Ce2O7; high-temperature corrosion; corrosion mechanism; DEGRADATION; RESISTANCE; BEHAVIOR; PROGRESS; YSZ;

D O I：

10.3390/coatings14070877

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To tackle the ever-increasing operating temperature of aero-engines, a La2Ce2O7 (LCO)/yttria partially stabilized zirconia (YSZ) double-layer thermal barrier coating (TBC) was investigated. The LCO/YSZ double-layer samples were annealed with volcanic ash (VA) at 1250 degrees C to assess their stability in comparison with that of standard single-layer YSZ. The findings showed that the double-layer system exhibited greater resistance to VA damage than the single-layer YSZ coating. The corrosion mechanism was characterized by a rapid crystallization reaction between LCO and VA, where the kinetics of the solution's reprecipitation reaction outpaced the penetration rate into the coating's open pores.

引用

页数：17

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