| 烧结温度对放电等离子烧结AlCoCrFeNi2.1高熵合金性能的影响 |
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| 引用本文： | 姚瑞敏,郑留伟.烧结温度对放电等离子烧结AlCoCrFeNi2.1高熵合金性能的影响[J].机械工程材料,2019,43(7):28-32,73. |
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| 作者姓名： | 姚瑞敏 郑留伟 |
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| 作者单位： | 山西工程职业技术学院机械工程系,太原,030009;山西工程职业技术学院机械工程系,太原 030009;太原理工大学材料科学与工程学院,太原 030024 |
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| 摘 要： | 采用放电等离子烧结(SPS)技术在不同烧结温度(850,950,1050,1150℃)保温5min条件下制备AlCoCrFeNi2.1高熵合金,研究了烧结温度对合金的烧结性能、物相组成、微观形貌和力学性能的影响。结果表明:随着烧结温度升高,合金表面气孔数量逐渐减少,合金相对密度增大;当烧结温度升至1150℃时,合金颗粒间形成了良好的冶金结合;随着烧结温度升高,烧结合金的显微硬度和屈服强度均先增后降,当烧结温度为1050℃时,烧结合金的显微硬度和屈服强度最大;烧结合金的断裂机制为沿晶断裂和穿晶断裂。
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| 关 键 词： | 放电等离子烧结 高熵合金 烧结温度 力学性能 |
Effects of Sintering Temperature on Properties of AlCoCrFeNi2.1 High-Entropy Alloy by Spark Plasma Sintering |
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| YAO Ruimin,ZHENG Liuwei.Effects of Sintering Temperature on Properties of AlCoCrFeNi2.1 High-Entropy Alloy by Spark Plasma Sintering[J].Materials For Mechanical Engineering,2019,43(7):28-32,73. |
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| Authors: | YAO Ruimin ZHENG Liuwei |
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| Affiliation: | (Department of Mechanical Engineering,Shanxi Engineering Vocational College,Taiyuan 030009,China;College of Materials Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China) |
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| Abstract: | AlCoCrFeNi2.1 high-entropy alloy was prepared by spark plasma sintering (SPS)at different sintering temperatures(850,950,1 050,1 150 ℃)for 5min.The effects of sintering temperature on sintering properties,phase composition,micromorphology,mechanical properties of the alloy were studied.The results show that with sintering temperature increasing,the amount of pores on the surface of the alloy decreased and the relative density of the alloy increased.When the sintering temperature rose to 1 150℃,good metallurgic bonding was formed between the alloy particles.With the increase of sintering temperature,the microhardness and yield strength of the sintered alloy increased first and then decreased.When the sintering temperature was 1 050℃,the microhardness and yield strength of the sintered alloy were the highest.The fracture mechanism of the sintered alloy was intergranular fracture and transgranular fracture. |
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| Keywords: | spark plasma sintering high-entropy alloy sintering temperature mechanical property |
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