首页|Nanoscopic tribological characteristics of a cryogenically cycled Zr-based metallic glass

Nanoscopic tribological characteristics of a cryogenically cycled Zr-based metallic glass

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Optimized macroscopic tribological behavior can be anticipated in metallic glasses(MGs)by cryogenic cycling treatment(CCT),which is attributed to enhanced plasticity.However,the intrinsic friction mechanisms of MGs induced by cryogenic rejuvenation are still poorly understood.In the present study,nanoscopic wear tests were conducted on the Zr-based MGs surface with different CCT cycles using atomic force microscopy(AFM).After CCT treatment with 100 cycles,the MG displays the highest adhesion and ploughing frictions,but significantly improved anti-wear properties.Adhesion tests and molecular dy-namics simulations disclose that the increased adhesion is attributed to the dominance of liquid-like regions in the CCT-treated MGs,and the impact of reduced hardness and weak elastic recovery results in the deteriorated ploughing friction.The enhanced plasticity effectively dissipates the strain from the AFM tip through multiple shear bands and weakens the adhesion during deformation,giving rise to excellent wear resistance.This study elucidates the promoting effect of CCT on the outstanding anti-wear performance of MGs,and is helpful for the development of novel alloys.

metallic glassescryogenic cycling treatmentnanoscope wearfriction mechanism

Qian Jia、Qiaosheng Xia、Qing Zhou、Yucheng Wang、Yue Ren、Yu Meng、Haifeng Wang、Feng Zhou

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State Key Laboratory of Solidification Processing,Center of Advanced Lubrication and Seal Materials,Northwestern Polytechnical University Xi'an 710072,China

Shaanxi Key Laboratory of Surface Engineering and Remanufacturing,Xi'an University Xi'an 710065,China

State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Research and Development Program of Shaanxi ProvinceNatural Science Foundation of Shaanxi ProvinceOpen Fund of Liaoning Provincial Key Laboratory of Aeroengine Materials TribologyScience and Technology on Reactor System Design Technology LaboratoryFundamental Research Funds for the Central Universities

52175188522010872023-YBGY-4342022JM-253LKLAMTF202301

2024

10.1007/s11433-023-2343-x

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(6)