Effect of residual nanocrystals on thermal stability and mechanical properties of metalloid-containing amorphous alloys
作者： Sun Ig Hong , GholamHossein Akbari , Mohsen Saboktakin Rizi , Hossein Minouei
DOI: 10.1016/J.MATCHAR.2021.110914
关键词: Materials science 、 Crystallization 、 Phase (matter) 、 Thermal stability 、 Differential scanning calorimetry 、 Microstructure 、 Nanoindentation 、 Amorphous metal 、 Chemical engineering 、 Alloy
摘要: Abstract Herein we present the amorphization, thermal stability, crystallization behavior, and mechanical properties of (Ni60Nb40)100-x-ySixBy (x = 0, 5 10 at.%, y = 0, at.%) alloys with six distinct compositions. We investigated influence nanocrystals formed by addition Si B on stability alloys. The phase stabilities were studied using X-ray diffraction, high-resolution transmission electron microscopy, differential scanning calorimetry characterized nanoindentation testing. It was found that single-step occurred in B-free alloys, whereas double step B-containing (Ni60Nb40)90Si10 alloy exhibited highest onset temperature 714 °C, (Ni60Nb40)95B5 shows lowest at 642 °C. microstructure amorphous consists nano-sized metallic crystals a size less than 5 nm embedded an phase. existence residual facilitates heterogeneous nucleation during phase, weakening Crystallization remarkably enhances 40–60% increase hardness 19–88% elastic modulus. An after is lower because nano-intermetallic phases formation crystallization, due to presence nanocrystals.
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