Preparation of tungsten-particle-reinforced Zr-based bulk metallic glass composites by two-step spark plasma sintering:microstructure evolution,densification mechanism and mechanical properties

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外文摘要：A new two-step spark plasma sintering(TSS)process with low-temperature pre-sintering and high-tem-peraturefinal sintering has been successfully applied to prepare the tungsten-particle(Wp)-reinforced bulk metallic glass composites(Wp/BMGCs).Compared to normal spark plasma sintering(NS),the densification rate and relative density of Wp/BMGCs can be improved by selecting TSS with appropriate sintering pressure in the low temperature pre-sintering stage.However,the compressive strength and plastic strain of 30％Wp/BMGCs prepared by TSS are both higher than those of the samples prepared by NS.The TSS process can significantly enhance the compressive strength of 30％Wp/BMGCs by 12％ and remarkably increase the plastic strain by 50％,while the trend is completely opposite for 50％Wp/BMGCs.Quasi-in situ experiments and finite element simulations reveal that uneven temper-ature distribution among particles during low-temperature pre-sintering causes local overheating at contact points between particles,accelerating formation of sintering neck between particles and plastic deformation of Wp.When the volume fraction of Wp is low,TSS can improve the interface bonding between particles by increasing the number of sintering necks.This makes the fracture mode of Wp/BMGCs being predominantly transgranular fracture.However,as the volume fraction of Wp increases,the adverse effects of Wp plastic deformation are becoming more and more prominent.The aggregated Wp tends to form a solid"cage structure"that hinders the bonding between particles at the interface;correspondingly,the fracture behavior of Wp/BMGCs is mainly dominated by intergranular fracture.Additionally,reducing the sintering pressure during the low-temperature pre-sintering stage of TSS has been shown to effectively decrease plastic defor-mation in Wp,resulting in a higher degree of densification and better mechanical properties.

外文关键词：

Bulk metallic glass compositesTungsten particleTwo-step spark plasma sinteringDensification mechanismMechanical properties

作者：

Yun-Fei Ma、Pan Gong、Mao Zhang、Hui-E.Hu、Zhen Peng、Xiao Xu、Xin Wang、Mehdi Malekan、Xue-Feng Tang、Lei Deng、Jun-Song Jin、Xin-Yun Wang

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作者单位：

State Key Laboratory of Materials Processing and Die and Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,China

Department of Chemistry and Materials,Naval University of Engineering,Wuhan 430032,China

School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China

College of Machine,Shanghai Dianji University,Shanghai 201306,China

School of Metallurgy and Materials Engineering,College of Engineering,University of Tehran,Tehran 11155-4563,Iran

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationKnowledge Innovation Program of Wuhan-Basic Research and the Fundamental Research Funds for the Central Universities

项目编号：

523711545209004352175371522711472023A15150121582021GCRC003

出版年：

2024

DOI：

10.1007/s12598-023-02558-9

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

年,卷(期)：2024.43(4)

参考文献量67