MECHANICAL CHARACTERIZATION OF BI-LAYER EBC COATINGS UNDER TENSION AND BENDING USING ACOUSTIC EMISSION AND DIGITAL IMAGE CORRELATION

被引：0

作者：

Panakarajupally, Ragav P. ^{[1
]}

Morscher, Gregory N. ^{[1
]}

Shi, Jun ^{[2
]}

机构：

[1] Univ Akron, Akron, OH 44325 USA

[2] Rolls Royce Corp, Indianapolis, IN USA

来源：

PROCEEDINGS OF ASME TURBO EXPO 2023: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, GT2023, VOL 2 | 2023年

关键词：

EBC coatings; Mechanical Characterization; DIC; Acoustic Emission; ENVIRONMENTAL BARRIER COATINGS; DEPENDENT MATRIX CRACKING; ELECTRICAL-RESISTANCE; COMPOSITES; BEHAVIOR;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Fracture characteristics of bi-layer environmental barrier coatings (EBC) deposited on a woven ceramic matrix composite (CMC) substrate using air plasma spray (APS) processes were investigated under uniaxial tension and bend tests at room temperature. Health monitoring techniques such as acoustic emission (AE) and digital image correlation (DIC) were employed to better understand the cracking behavior of the coating and its progression. Post-test microscopy was performed to correlate the coating cracks with DIC and AE location. The results indicate that multiple transverse cracks first occurred in the coating, followed by substrate transverse cracks and additional coating cracks. DIC analysis was able to highlight the formation and location of these cracks. The fracture strength of the coating was estimated assuming the composite beam theory.

引用

页数：8

共 22 条

[1] Mechanical properties and real-time damage evaluations of environmental barrier coated SiC/SiC CMCs subjected to tensile loading under thermal gradients [J].