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Metals, Volume 9, Issue 12 (December 2019) – 120 articles
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Cover Story (view full-size image) Refractory high entropy alloys (HEAs) are considered to be a candidate as structure materials for [...] Read more. Refractory high entropy alloys (HEAs) are considered to be a candidate as structure materials for ultra-high temperature uses. However, high melting temperature and low thermal conductivity of refractory HEAs make it difficult to be fabricated by conventional methods such as casting and machining, suggesting that near-net shape powder metallurgy including 3D printing and metal injection molding become promising. Here, new approach that uses hydrogen embrittlement and spheroidization by thermal plasma to fabricate the spherical powder of refractory HEAs is introduced, which allows them to be applicable for high temperature applications. View this paper.