xCuFeNiCoCr高熵合金。研究了鋁含量對(duì)合金性能和組織的影響，并討論了合金制備過(guò)程中晶粒性能的變化。結(jié)果表明，在球磨過(guò)程中合金晶粒細(xì)化，且合金晶粒尺寸隨Al含量的增加而增大。在燒結(jié)過(guò)程中，合金中會(huì)產(chǎn)生新的晶粒，并首先吸收一定熱量形成含Al的金屬間化合物。在1200 ℃加熱2 h后，獲得具有簡(jiǎn)單晶體結(jié)構(gòu)的相，證實(shí)了高熵合金的形成。根據(jù)獲得的能譜，合金組成均勻，合金化程度高。然而，隨著Al含量的增加，出現(xiàn)了少量具有高Al含量的高對(duì)比度區(qū)域。合金具有良好的高溫抗氧化性能和抗電化學(xué)腐蝕性能。隨著鋁含量的增加，合金的高溫抗氧化性能提高。當(dāng)Al含量為1mol%時(shí)，自腐蝕電壓為-235 mV。隨著Al含量的增加，硬度也增加。結(jié)果表明，當(dāng)Al含量為1mol%時(shí)，合金具有最佳綜合性能。;AlxCuFeNiCoCr high-entropy alloys were prepared by powder metallurgy method. The effect of Al content on the properties and microstructure of the alloys was studied, and the change in the grain properties during the preparation of the alloys was discussed. The results show that the alloy grains are refined during the milling process, and the grain size of the alloy increases with the increase of Al content. New grains are generated in the alloy during the sintering process, and an intermetallic compound containing Al is initially formed by absorbing a certain amount of heat. A phase with simple crystal structure is obtained after heating at 1200 °C for 2 h, which confirms the formation of high-entropy alloy. Based on the obtained energy spectrum, the alloy composition is uniform, and the alloying degree is high. However, with the increase in Al content, a small number of high-contrast areas with high Al content emerge. The alloys exhibit a good high-temperature oxidation resistance and electrochemical corrosion resistance. The oxidation resistance at high temperature increases with the increase of Al content. The self-corrosion voltage is -235 mV when x=1.0. With the increase in Al content, the hardness also increases. The best overall properties of the alloy are achieved when x=1.0."/>