克力木·吐鲁干,张瑞阳,韩杰胜

• 1:新疆大学机械工程学院
• 2:中国科学院兰州化学物理研究所

摘要(Abstract)：

采用放电等离子烧结技术（SPS）制备了AlCrTiMoTa_x(x=0.25, 0.5, 0.75, 1)五元难熔高熵合金，通过XRD、SEM和EDS等手段表征了该体系合金的组织结构，并重点考察了其高温抗氧化性能．结果表明：Ta含量与合金的组织结构和抗氧化性能有极大的相关性，随着Ta含量的升高，合金的物相由BCC单相结构转变为多相结构，抗氧化性能逐渐增强．AlCrTiMoTa_x合金的氧化层均由TiO_2、Al_2O_3、Cr_2O_3和CrTaO_4组成，氧化层中的CrTaO_4的相对含量与合金的抗氧化性能呈正相关．x=0.75和1时，合金表面能够形成致密的CrTaO_4层，并且具有优异的抗氧化性能．

关键词(KeyWords)： 放电等离子烧结;难熔高熵合金;组织结构;高温抗氧化性能

Abstract:

Keywords:

基金项目(Foundation): 新疆维吾尔自治区创新环境建设专项-自然科学计划联合基金（2021D01C101）;; 甘肃省自然科学基金（20JR5RA560）

作者(Author): 克力木·吐鲁干,张瑞阳,韩杰胜

DOI: 10.13568/j.cnki.651094.651316.2021.07.01.0001

参考文献(References)：

• [1]宋丹,周建平,王恪典,等.7075铝合金短电弧洗削加工工艺试验研究[J].新疆大学学报(自然科学版),2019,36(4):395-399.
• [2]YEH J W,CHEN S K,LIN S J,et al.Nanostructured high-entropy alloys with multiple principal elements:novel alloy design concepts and outcomes[J].Adv Eng Mater,2004,6(5):299-303.
• [3]MIRACLE D,SENKOV O.A critical review of high entropy alloys and related concepts[J].Acta Materialia,2017,122:448-511.
• [4]TSAI M H,YEH J W.High-entropy alloys:a critical review[J].Materials Research Letters,2014,2(3):107-123.
• [5]ZHANG Y,ZUO T T,TANG Z,et al.Microstructures and properties of high-entropy alloys[J].Progress in Materials Science,2014,61:1-93.
• [6]张勇,陈明彪,杨潇,等.先进高熵合金技术[M].北京:化学工业出版社,2019.
• [7]TORRALBA J M,Al VAREDO P.Andrea Garc′?a-Junceda:high-entropy alloys fabricated via powder metallurgy[J].Powder Metallurgy,2016,5(5):157-163.
• [8]SENKOV O,MIRACLE D.High temperature strength of refractory complex concentrated alloys[J].Acta Materialia,2019,175:394-405.
• [9]李春玲,马跃,郝家苗,等.难熔高熵合金的研究进展及应用[J].精密成形工程,2017,9(6):117.
• [10]韩杰胜,吴有智,孟军虎,等.放电等离子烧结制备Mo Nb Ta W难熔高熵合金[J].稀有金属材料工程,2019,48(6):2021.
• [11]SENKOV O,WILKS G,MIRACLE D,et al.Refractory high-entropy alloys[J].Intermetallics,2010,18:1758-1765.
• [12]SENKOV O,WILKS G,SCOTT J,et al.Mechanical properties of Nb25Mo25Ta25W25and V20Nb20Mo20Ta20W20refractory high entropy alloys[J].Intermetallics,2011,19:698-706.
• [13]SENKOV O,MIRACLE D,CHAPUT K,et al.Development and exploration of refractory high entropy alloys:a review[J].Journal of Materials Research,2018,33(19):3092-3128.
• [14]要玉宏,梁霄羽,金耀华,等.新型Nb Mo Cr Ti Al-1Si-x B(x=0、1)难熔高熵合金的微观组织及高温氧化行为研究[J].表面技术,2020,49(6):224-235.
• [15]SENKOV O,WOODWORD C.Microstructure and properties of a refractory Nb Cr Mo0.5Ta0.5Ti Zr alloy[J].Materials Science and Engineering:A,2011,529:311-320.
• [16]SENKOV O,SENKOV S,DIMIDUK D,et al.Oxidation behavior of a refractory Nb Cr Mo0.5Ta0.5Ti Zr alloy[J].Journal of Materials Science,2012,47:6522-6534.
• [17]LIU C M,WANG M H,ZHANG S Q,et al.Microstructure and oxidation behavior of new refractory high entropy alloys[J].Journal of Alloys and Compounds,2014,583:162-169.
• [18]GORR B,AZIM M.Phase equilibria,microstructure,and high temperature oxidation resistance of novel refractory high-entropy alloys[J].Journal of Alloys and Compounds,2015,624:270-278.
• [19]GORR B,MULLER T,HEILMAIER M,et al.High-temperature oxidation behavior of refractory high-entropy alloys:effect of alloy composition[J].Oxid Met,2017,88:339-349.
• [20]LO K C,CHANG Y J.An oxidation resistant refractory high entropy alloy protected by Cr Ta O4-based oxide[J].Scientific Reports,2019,9:7266.
• [21]MULLER F,GORR B.On the oxidation mechanism of refractory high entropy alloys[J].Corrosion Science,2019,159:108161.
• [22]GORR B,MULLER F.A new strategy to intrinsically protect refractory metal based alloys at ultra high temperatures[J].Corrosion Science,2020,166:108475.
• [23]LO K C,YEH J W.Oxidation behaviour of a novel refractory high entropy alloy at elevated temperatures[J].Intermetallics,2020,119:106711.
• [24]MULLER F,GORR B.Effect of Y additions on the oxidation behaviour of novel refractory high-entropy alloy Nb Mo Cr Ti Al at1 000℃in air[J].Oxidation of Metals,2020,94:147-163.
• [25]MULLER F,GORR B.Effect of microalloying with silicon on high temperature oxidation resistance of novel refractory highentropy alloy Ta-Mo-Cr-Ti-Al[J].Materials at High Temperatures,2018,35:168-176.
• [26]GORR B,MULLER F.High temperature oxidation behavior of an equimolar refractory metal-based alloy 20Nb-20Mo-20Cr-20Ti-20Al with and without Si addition[J].Journal of Alloys and Compounds,2016,688:468-477.
• [27]ZHANG R,MENG J,HAN J,et al.Oxidation resistance properties of refractory high-entropy alloys with varied Alx Cr Ti Mo content[J].Journal of Materials Science,2021,56:3551-3561.
• [28]MULLER F,GORR B.Formation of complex intermetallic phases in novel refractory highentropy alloys Nb Mo Cr Ti Al and Ta Mo Cr Ti Al:thermodynamic assessment and experimental validation[J].Journal of Alloys and Compounds,2020,842:155726.
• [29]NELSON J,RILEY D.An experimental investigation of extrapolation methods in the derivation of accurate unitcell dimensions of crystals[J].Proc Phys Soc Lond,1945,57:160-177.
• [30]XU T T,LU Y P,CAO Z Q,et al.Effects of Ta addition on the microstructure and mechanical properties of Co Cu0.5Fe Ni high-entropy alloy[J].Journal of Materials Engineering and Performance,2019,28:7642-7648.