BORIDE-REINFORCED ALUMINUM-CONTAINING HIGH-ENTROPY ALLOY COMPOSITION

To provide a boride-reinforced aluminum-containing high-entropy alloy composition.SOLUTION: A composition, a machine component (29, 50) coated with the composition, and a method of coating the machine component (29, 50) are provided. The composition includes a CoNiCrAlY alloy, where three or more elements of the CoNiCrAlY alloy are present in equimolar amounts, one of the three or more elements of the CoNiCrAlY alloy being aluminum (Al), and where a molar fraction of Al is between about 0.20 and about 0.25. The composition further includes a transition metal boride including at least one of: cobalt boride (Co2B), titanium boride (TiB2), zirconium boride (ZrB2), tantalum boride (TaB2), niobium boride (NiB2), or molybdenum boride (Mo2B), and a high-melting point alloy.SELECTED DRAWING: Figure 1 【課題】ホウ化物強化アルミニウム含有ハイエントロピー合金組成物【解決手段】組成物、該組成物で被覆された機械部品（２９，５０）及び機械部品（２９，５０）の被覆方法を提供する。本組成物は、ＣｏＮｉＣｒＡｌＹ合金であって、ＣｏＮｉＣｒＡｌＹ合金の３種以上の元素が等モル量で存在し、ＣｏＮｉＣｒＡｌＹ合金の３種以上の元素の１つがアルミニウム（Ａｌ）であり、Ａｌのモル分率が約０．２０～約０．２５である、ＣｏＮｉＣｒＡｌＹ合金を含む。本組成物は、ホウ化コバルト（Ｃｏ２Ｂ）、ホウ化チタン（ＴｉＢ２）、ホウ化ジルコニウム（ＺｒＢ２）、ホウ化タンタル（ＴａＢ２）、ホウ化ニオブ（ＮiＢ２）又はホウ化モリブデン（Ｍｏ２Ｂ）の１種以上を含む遷移金属ホウ化物と、高融点合金とをさらに含む。【選択図】図１