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Atomic interaction mechanism for designing the interface of W/Zr-based bulk metallic glass composites.

Li ZK, Fu HM, Sha PF, Zhu ZW, Wang AM, Li H, Zhang HW, Zhang HF, Hu ZQ - Sci Rep (2015)

Bottom Line: 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.Both the compressive and tensile properties are improved obviously.

View Article: PubMed Central - PubMed

Affiliation: 1] Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang. 110016, China [2] University of Chinese Academy of Sciences, Beijing. 100049, China.

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.

No MeSH data available.


Related in: MedlinePlus

The calculated atomic interaction () between elements.
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f1: The calculated atomic interaction () between elements.

Mentions: Considering the effect of element addition on the GFA of the matrix, the Zr40.08Ti13.30Cu11.84Ni10.07Be24.71 alloy (denoted as V) with high GFA and strong composition deviation tolerance was selected as the amorphous matrix. The impact of Nb addition was evaluated first. Figure 1 shows the calculated atomic interaction () between compositional elements in the alloy and W element. It is obvious that the interactions between W and compositional elements are stronger than those between themselves. The W-Nb interaction is the strongest () followed by W-Zr interaction (, ). This indicates that W-Zr compound will form preferentially at the interface in Nb-free W/Zr-based alloy composite. Previous research agrees well with the calculation182425. On the other hand, it can be predicted that Nb will segregate on the W surface in Nb-containing system and restrain the reaction between W and Zr.


Atomic interaction mechanism for designing the interface of W/Zr-based bulk metallic glass composites.

Li ZK, Fu HM, Sha PF, Zhu ZW, Wang AM, Li H, Zhang HW, Zhang HF, Hu ZQ - Sci Rep (2015)

The calculated atomic interaction () between elements.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4355671&req=5

f1: The calculated atomic interaction () between elements.
Mentions: Considering the effect of element addition on the GFA of the matrix, the Zr40.08Ti13.30Cu11.84Ni10.07Be24.71 alloy (denoted as V) with high GFA and strong composition deviation tolerance was selected as the amorphous matrix. The impact of Nb addition was evaluated first. Figure 1 shows the calculated atomic interaction () between compositional elements in the alloy and W element. It is obvious that the interactions between W and compositional elements are stronger than those between themselves. The W-Nb interaction is the strongest () followed by W-Zr interaction (, ). This indicates that W-Zr compound will form preferentially at the interface in Nb-free W/Zr-based alloy composite. Previous research agrees well with the calculation182425. On the other hand, it can be predicted that Nb will segregate on the W surface in Nb-containing system and restrain the reaction between W and Zr.

Bottom Line: 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.Both the compressive and tensile properties are improved obviously.

View Article: PubMed Central - PubMed

Affiliation: 1] Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang. 110016, China [2] University of Chinese Academy of Sciences, Beijing. 100049, China.

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.

No MeSH data available.


Related in: MedlinePlus