Engineering multiscale structural hierarchies in glassy alloys enable a broad spectrum of potential appli-cations.Metallic glasses were born in hierarchical structures from atomic-to-nanometer scales.However,the frozen-in structures in traditional metallic glasses prepared by rapid quenching techniques are chal-lenging to tailor.Here,we show that a Pd40Ni40P20 bulk nanostructured glass of polyamorphous interfa-cial structures was prepared by inert-gas condensation with a laser evaporation source,and its multiscale structures could be engineered.In-situ scattering experiment results reveal polyamorphous phase tran-sitions occurred in the interfacial regions,which are accompanied by the evolution of medium-range order and the nanoscale heterogeneous structures during the condensation process of glassy nanoparti-cles under high pressure and the following heating process.Moreover,changes in the cluster connectivity resulting from repacking of the local ordering induced by pressure and temperature could be observed.The thermophysical and mechanical properties,including boson peaks,hardness,and elasticity modu-lus,could be changed as a function of heat-treatment parameters.Our findings would shed light on the synthesis of bulk nanostructured glassy alloys with tailorable thermodynamic and dynamical behavior as well as mechanical properties based on the understanding of metastability for polyamorphous interfacial phases.

Shu Fu;Sinan Liu;Jiacheng Ge;Junjie Wang;Huiqiang Ying;Shangshu Wu;Mengyang Yana;Li Zhu;Yubin Ke;Junhua Luan;Yang Ren;Xiaobing Zuo;Zhenduo Wu;Zhen Peng;Chain-Tsuan Liu;Xun-Li Wang;Tao Feng;Si Lan

Herbert Gleiter Institute of Nanoscience,School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,P.R.China;Department of Physics,City University of Hong Kong,83 Tat Chee Avenue,Kowloon,Hong Kong SAR,P.R.China;Spallation Neutron Source Science Center,Dongguan 523803,P.R.China;Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong,P.R.China;X-ray Science Division,Argonne National Laboratory,Lemont,Illinois 60439,USA;Center of Neutron Scattering and Applied Physics,City University of Hong Kong Dongguan Research Institute,Dongguan 52300,P.R.China;School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,P.R China;Center of Neutron Scattering,City University of Hong Kong Shenzhen Research Institute,8 Yuexing 1st Road,Shenzhen Hi-Tech Industrial Park,Shenzhen 518057,P.R.China

材料科学技术（英文版）

[1]Shu Fu;Sinan Liu;Jiacheng Ge;Junjie Wang;Huiqiang Ying;Shangshu Wu;Mengyang Yana;Li Zhu;Yubin Ke;Junhua Luan;Yang Ren;Xiaobing Zuo;Zhenduo Wu;Zhen Peng;Chain-Tsuan Liu;Xun-Li Wang;Tao Feng;Si Lan-.In situ study on medium-range order evolution during the polyamorphous phase transition in a Pd-Ni-P nanostructured glass)[J].材料科学技术（英文版）,2022(30):145-156

polyamorphous,Pd40Ni40P20,repacking

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