Author/Authors :
Yan، نويسنده , , Zilin and Huang، نويسنده , , Qunying and Guo، نويسنده , , Zhihui and Song، نويسنده , , Yong and Li، نويسنده , , Chunjing and Liu، نويسنده , , Shaojun and Han، نويسنده , , Qian and Deng، نويسنده , , Changguang، نويسنده ,
Abstract :
In the design of liquid–metal fusion blankets, Al2O3 ceramic is one of the most promising coating materials. In this study, functionally graded FeAl/Al2O3 coatings were deposited on China Low Activation Martensitic (CLAM) steel substrates with vacuum plasma spraying (VPS) method. The SEM investigation revealed that the adhesion between adjacent layers in the coatings was sound. X-ray diffraction showed that stable alpha alumina dominated in the top alumina layers, while γ-Al2O3 and β-Al2O3 were also detected. The coating/substrate adhesive tensile strength test showed that adhesive strength of graded coatings was about 2.5 times that of duplex FeAl/Al2O3 coatings. Thermal shock resistance test indicated that the graded coatings could tolerate more thermal shock cycles than duplex coatings.
Keywords :
Functionally graded coating , Fusion reactor , Clam , Vacuum plasma spraying
