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Most refractory high-entropy alloys (HEAs) are brittle and suffer from limited formability at ambient temperature. Previous studies imply that grain boundaries affect their fracture behavior, but quantitative studies on the fracture properties of body-centered-cubic HEAs are scarce. Here, using in situ micro-cantilever tests, we show that the fracture toughness of a bi-crystal HEA, Nb25Mo25Ta25W25...
Liquid phase growth (LPG) of Bi 0.5 Sb 1.5 Te 3 was performed by the sliding-boat method. The LPG samples were found to be highly oriented along the hexagonal c-axis, where the thermoelectric properties are excellent. The loss of Te during the LPG process is compensated by setting up a Te reservoir or in raw material rooms in a sliding-boat.
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