Fe22Co26Cr20Ni22Ta10高熵合金基复合材料的自润滑性能

共晶高熵合金(EHEAs)具有高温稳定性和良好的力学性能,并有望在高温下应用于摩擦领域.为了研究其高温润滑性能,采用BaF2/CaF2共晶粉末作为润滑相,通过放电等离子烧结制备Fe22Co26Cr20Ni22Ta10?(BaF2/CaF2)x(x=3％～20％,质量分数)复合材料,在室温和高温下测试摩擦性能和力学性能.结果表明,随着BaF2/CaF2共晶粉末的增加,复合材料在600和800℃时的摩擦因数和磨损率明显降低.其中,共晶粉末含量为15％和20％的复合材料在600℃时具有最佳的润滑性能.复合材料的低摩擦因数和低磨损率主要归功于共晶高熵合金基体良好的力学性能、BaF2/CaF2相的润滑作...

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Published in中国有色金属学报（英文版） Vol. 31; no. 3; pp. 744 - 752
Main Authors 肖维城, 李昆, 韩六六, 刘咏
Format Journal Article
LanguageChinese
Published 中南大学粉末冶金国家重点实验室,长沙 410083 2021
Subjects
eutectic high entropy alloy
自润滑复合材料
显微组织
摩擦磨损性能
microstructure
共晶高熵合金
BaF2/CaF2共晶粉末
self-lubricating composite
BaF2/CaF2 eutectic powder
tribological properties
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Abstract 共晶高熵合金(EHEAs)具有高温稳定性和良好的力学性能,并有望在高温下应用于摩擦领域.为了研究其高温润滑性能,采用BaF2/CaF2共晶粉末作为润滑相,通过放电等离子烧结制备Fe22Co26Cr20Ni22Ta10?(BaF2/CaF2)x(x=3％～20％,质量分数)复合材料,在室温和高温下测试摩擦性能和力学性能.结果表明,随着BaF2/CaF2共晶粉末的增加,复合材料在600和800℃时的摩擦因数和磨损率明显降低.其中,共晶粉末含量为15％和20％的复合材料在600℃时具有最佳的润滑性能.复合材料的低摩擦因数和低磨损率主要归功于共晶高熵合金基体良好的力学性能、BaF2/CaF2相的润滑作用以及在磨损表面上形成的连续氧化物.
AbstractList 共晶高熵合金(EHEAs)具有高温稳定性和良好的力学性能,并有望在高温下应用于摩擦领域.为了研究其高温润滑性能,采用BaF2/CaF2共晶粉末作为润滑相,通过放电等离子烧结制备Fe22Co26Cr20Ni22Ta10?(BaF2/CaF2)x(x=3％～20％,质量分数)复合材料,在室温和高温下测试摩擦性能和力学性能.结果表明,随着BaF2/CaF2共晶粉末的增加,复合材料在600和800℃时的摩擦因数和磨损率明显降低.其中,共晶粉末含量为15％和20％的复合材料在600℃时具有最佳的润滑性能.复合材料的低摩擦因数和低磨损率主要归功于共晶高熵合金基体良好的力学性能、BaF2/CaF2相的润滑作用以及在磨损表面上形成的连续氧化物.
Abstract_FL Eutectic high entropy alloys (EHEAs) have high temperature stability, good mechanical properties, and are promising for tribological applications at high temperatures. To study the high temperature lubrication behavior, Fe22Co26Cr20Ni22Ta10?(BaF2/CaF2)x (x=3?20, wt.％) composites were prepared by spark plasma sintering (SPS), with BaF2/CaF2 eutectic powder used as solid lubricant. The lubrication behavior and mechanical properties were studied at both room and high temperatures. With the increase of the content of BaF2/CaF2 eutectic powder, the friction coefficients and the wear rates of the composites at 600 and 800℃ decrease significantly. The composites with eutectic powder content of 15 and 20 wt.％ have the best lubricating performance at 600℃, with low friction coefficient and wear rates, mainly due to the good mechanical properties of EHEA matrix, the lubrication effect of BaF2/CaF2 phase and the oxides formed on the worn surface.
Author 肖维城
李昆
韩六六
刘咏
AuthorAffiliation 中南大学粉末冶金国家重点实验室,长沙 410083
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Author_FL Wei-cheng XIAO
Liu-liu HAN
Kun LI
Yong LIU
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DocumentTitle_FL Self-lubricating behavior of Fe22Co26Cr20Ni22Ta10 high-entropy alloy matrix composites
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Keywords eutectic high entropy alloy
自润滑复合材料
显微组织
摩擦磨损性能
microstructure
共晶高熵合金
BaF2/CaF2共晶粉末
self-lubricating composite
BaF2/CaF2 eutectic powder
tribological properties
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