Abstract：
:The interaction between active element Zr and W damages the W fibers and the interface and decreases the mechanical properties, especially the tensile strength of the W fibers reinforced Zr-based bulk metallic glass composites (BMGCs). From the viewpoint of atomic interaction, the W-Zr interaction can be restrained by adding minor elements that have stronger interaction with W into the alloy. The calculation about atomic interaction energy indicates that Ta and Nb preferred to segregate on the W substrate surface. Sessile drop experiment proves the prediction and corresponding in-situ coating appears at the interface. Besides, the atomic interaction mechanism was proven to be effective in many other systems by the sessile drop technique. Considering the interfacial morphology, Nb was added into the alloy to fabricate W/Zr-based BMGCs. As expected, the Nb addition effectively suppressed the W-Zr reaction and damage to W fibers. Both the compressive and tensile properties are improved obviously.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Li ZK,Fu HM,Sha PF,Zhu ZW,Wang AM,Li H,Zhang HW,Zhang HF,Hu ZQdoi
10.1038/srep08967subject
Has Abstractpub_date
2015-03-11 00:00:00pages
8967issn
2045-2322pii
srep08967journal_volume
5pub_type
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