Al4CoNi5

Al4CoNi5 is an intermetallic compound combining aluminum, cobalt, and nickel in a fixed stoichiometric ratio, forming a hard ceramic-like metallic phase rather than a traditional solid solution alloy. This material belongs to the family of high-entropy and multi-principal-element intermetallics, primarily investigated in research contexts for high-temperature structural applications where superior strength retention and oxidation resistance are critical. Its use remains largely experimental and specialized, with potential applications in aerospace and power generation where conventional superalloys may reach performance limits, though brittleness and processing challenges typical of intermetallics limit current industrial adoption compared to established nickel-base superalloys.