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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Ti-Zr-Ni-Cu-B metallic glass as a precursor for superelastic alloy after crystallization
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Ti-Zr-Ni-Cu-B metallic glass as a precursor for superelastic alloy after crystallization

机译：Ti-Zr-Ni-Cu-B金属玻璃作为结晶后超弹性合金的前体

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摘要

In this study, 0.25, 0.5, and 1 at% boron is added to increase glass forming ability and thermal stability of Ti35Zr15Ni40Cu10 metallic glass, exhibiting outstanding superelasticity after crystallization. In order to confirm the improvement of thermal stability in supercooled liquid region, crystallization behavior and activation energy were investigated according to the amount of boron added. When more than 0.5 at% boron is added, a stable supercooled liquid is maintained, showing high values in glass forming ability parameters (Delta T-x (>50 K), T-rg (>0.539), gamma (>0.373), Delta H-chem(<-33.8 kJ/mol), and S-sigma/k(B) (>0.2709)). On the other hand, boron has a significant effect on grain refinement in Ti35Zr15Ni40Cu10 alloy. As a result, the average grain size when fully crystallized decreases from similar to 250 nm in Ti35Zr15Ni40Cu10 to similar to 70 nm in (Ti35Zr15Ni40Cu10)(99)B-1. At room temperature, the crystallized ribbon samples show superelasticity, verifying the possibility of utilizing metallic glass as a precursor. (Ti35Zr15Ni40Cu10)(99.5)B-0.5 alloy shows the best superelasticity with remnant depth ratio of 8.0%. In addition, superelastic temperature range becomes wider from 59 K to 310 K with increasing boron content up to 0.5 at% but decreases afterward. Therefore, (Ti35Zr15Ni40Cu10)(99.5)B-0.5 alloy exhibits an outstanding superelastic property among the alloys investigated in the present study. (C) 2021 Elsevier B.V. All rights reserved.
机译：在本研究中，添加0.25、0.5和1at%的硼以提高Ti35Zr15Ni40Cu10金属玻璃的玻璃形成能力和热稳定性，结晶后表现出优异的超弹性。为了证实过冷液相区热稳定性的改善，根据硼的添加量研究了结晶行为和活化能。当添加超过0.5 at%的硼时，保持稳定的过冷液体，玻璃形成能力参数（δT-x（>50 K）、T-rg（>0.539）、γ（>0.373）、δH-chem（<-33.8 kJ/mol）和S-sigma/K（B）（>0.2709））的值较高。另一方面，硼对Ti35Zr15Ni40Cu10合金的晶粒细化有显著影响。因此，完全结晶时的平均晶粒尺寸从Ti35Zr15Ni40Cu10中的250 nm减小到（Ti35Zr15Ni40Cu10）（99）B-1中的70 nm。在室温下，结晶的带状样品表现出超弹性，验证了将金属玻璃用作前体的可能性。（Ti35Zr15Ni40Cu10）（99.5）B-0.5合金表现出最好的超弹性，残余深度比为8.0%。此外，随着硼含量增加到0.5at%，超弹性温度范围从59K到310K变宽，但随后降低。因此，在本研究所研究的合金中，（Ti35Zr15Ni40Cu10）（99.5）B-0.5合金具有优异的超弹性性能。（c）2021爱思唯尔B.V.保留所有权利。

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