A Heat-Resistant NiCo0.6Fe0.2Cr1.5SiAlTi0.2 Overlay Coating for High-Temperature Applications

作者：Hsu Wei Lin; Murakami Hideyuki; Yeh Jien Wei; Yeh An Chou^*; Shimoda Kazuya

来源：Journal of the Electrochemical Society, 2016, 163(13): C752-C758.

DOI：10.1149/2.0821613jes

This paper proposes an overlay coating based on the high-entropy alloy composition NiCo0.6Fe0.2Cr1.5SiAlTi0.2 [high-entropy alloy coating (HEAC)]. HEAC samples underwent spark-plasma sintering processes and were subjected to oxidation tests, hightemperature hardness tests, and thermal conductivity and thermal expansion measurements. Experimental results indicated that the HEAC can form protective a-Al2O3 at 1100. C and exhibits oxidation behavior similar to that of MCrAlY. Furthermore, compared to MCrAlY, the HEAC possesses better thermal stability, higher hot hardness, lower thermal conductivity, and smaller thermal expansion. The potential of the HEAC as an overlay coating for high-temperature applications is discussed.

• 出版日期2016
• 单位清华大学