稀土CeO_2对AlCoCuFeMnNi高熵合金组织与性能的影响
Effects of Rare Earth CeO_2on Microstructure and Properties of AlCoCuFeMnNi High-entropy Alloys
查看参考文献22篇
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文摘
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采用等离子熔覆技术,在45钢基体上制备添加稀土CeO_2的AlCoCuFeMnNi高熵合金涂层。利用XRD,SEM和EDS研究涂层的显微组织和相组成,并测试其显微硬度和磨损性能。结果表明:合金涂层主要由BCC枝晶和FCC枝晶间组织构成。热力学计算表明,未添加稀土CeO_2的涂层中有少量AlCoNi相,而且其枝晶内析出了大量富Fe颗粒,涂层硬度值在260~420HV0.2间呈梯度变化,摩擦因数在0.16~0.57之间。添加1%(质量分数)的稀土CeO_2后,基体中Fe元素向涂层内部的扩散程度降低,涂层底部形成一条宽约32μm的富Fe胞晶过渡层,涂层硬度在400HV0.2左右,摩擦因数稳定在0.28~0.31之间,磨损量为添加前的74.4%,细晶强化是涂层磨损性能提高的主要原因。 |
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其他语种文摘
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The AlCoCuFeMnNi high-entropy alloy cladding layer with CeO_2 was prepared by plasma cladding technology on 45steel.The microstructure and phase composition of the cladding layer were investigated by XRD,SEM and EDS,and its microhardness and wear property were also tested.The results show that the phase structure of the cladding layer is mainly composed of BCC dendrites and FCC interdendrites.Thermodynamic calculation shows a small amount of AlCoNi phase exists in the cladding layer without CeO_2,and a large number of Fe-rich precipitated particles in the dendrites is observed,the hardness value exhibits gradient changes from 260HV0.2 to 420HV0.2,and their friction coefficient is between 0.16and 0.57.After adding 1%(mass fraction)CeO_2,the Fe diffusion decreases into cladding layer,and a 32μm Fe-rich peritectic transition layer is formed on the bottom of the cladding layer.The average hardness value is about 400HV0.2,and their friction coefficient is relatively stable(0.28-0.31).The mass loss of the layer with CeO_2is 74.4% of that without CeO_2.The grain refinement strengthening is the main reason of the improvement of wear properties. |
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来源
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材料工程
,2018,46(8):91-97 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2016.001182
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关键词
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高熵合金
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CeO_2
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显微组织
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磨损性能
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地址
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1.
中原工学院材料与化工学院, 郑州, 450007
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燕山大学, 亚稳材料制备技术与科学国家重点实验室, 河北, 秦皇岛, 066004
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苏州科技大学机械工程学院, 江苏, 苏州, 215009
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河海大学力学与材料学院, 南京, 210098
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金资助项目
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河南省郑州市科技攻关项目
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文献收藏号
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CSCD:6313108
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