Nitrogen-doping effect on glass formation and primary phase selection in Cu–Zr–Al alloys

Liu, Zengqian; Li, Ran; Wang, Hui; Zhang, Tao

doi:10.1016/j.jallcom.2011.01.121

Cited by 28 publications

(10 citation statements)

References 31 publications

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“…Secondly, the benefits of minor doping of oxygen and nitrogen on the GFA have been validated in the CuZr-based alloys. 16,28 It is reported that the dissolution of trace contents of oxygen and nitrogen in the liquid state can generate a wider atom size distribution and more efficient atomic packing structure in the alloys. 16,28 As a result, the undercooled melt may exhibit a somewhat lower atomic diffusivity which leads to sluggish nucleation and growth kinetics of crystallization.…”

Section: Resultsmentioning

confidence: 99%

“…2,12 In addition, the crystal precipitation is very sensitive to the temperature and alloy compositions. 13,16 So far, the desired control and adjustment of crystal nucleation and growth upon solidification has rarely been achieved in the composites except for an inoculation strategy proposed very recently. 17 Considering the high susceptibility of the crystallization behavior of the undercooled melt to its thermal history, an appropriate melt treatment can be a potent measure for this processing.…”

Section: Introductionmentioning

confidence: 99%

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Pronounced ductility in CuZrAl ternary bulk metallic glass composites with optimized microstructure through melt adjustment

Liu¹,

Li²,

Liu³

et al. 2012

AIP Advances

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Microstructures and mechanical properties of as-cast Cu47.5Zr47.5Al5 bulk metallic glass composites are optimized by appropriate remelting treatment of master alloys. With increasing remelting time, the alloys exhibit homogenized size and distribution of in situ formed B2 CuZr crystals. Pronounced tensile ductility of ∼13.6% and work-hardening ability are obtained for the composite with optimized microstructure. The effect of remelting treatment is attributed to the suppressed heterogeneous nucleation and growth of the crystalline phase from undercooled liquid, which may originate from the dissolution of oxides and nitrides as well as from the micro-scale homogenization of the melt

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pronounced ductility in CuZrAl ternary bulk metallic glass composites with optimized microstructure through melt adjustment

Liu¹,

Li²,

Liu³

et al. 2012

AIP Advances

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“…5b clearly show that nitrogen addition do not change the melting behavior of this alloy; namely, minor addition of nitrogen has no significant effect on the stability of the liquid phase which is different from N in Zr-based metallic glass [18]. Then, frustration of competing crystalline phases by proper nitrogen additions could be responsible for the enhancement of glass formation in the current Ti-based alloy.…”

Section: Glass Formation Of the Samples With Different Nitrogen Additmentioning

confidence: 84%

“…For widespread industrial applications of BMGs, it is thus vital to understand and explore effects of nitrogen on the GFA. Recently, it was reported that proper addition of nitrogen could be beneficial for glass formation in Zrbased BMGs [18]; nevertheless, it remains unclear about effects of N on GFA and mechanical properties of Ti-based alloy systems.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nitrogen on the Glass Formation and Mechanical Properties of a Ti-Based Metallic Glass

Cao

Wang

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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Effects of nitrogen addition on glass formation and mechanical properties of the Ti 42.5 Cu 40 Zr 10 Ni 5 Sn 2.5 metallic glass were systematically investigated. It was found that a small amount of nitrogen addition facilitated the glass formation by suppressing formation of the competing eutectic structure. Unlike large atomic size elements such as Hf and Pd which usually deteriorate specific strength, nitrogen can also increase the specific strength of the current Ti-based BMGs. The results are not only helpful for understanding glass-forming ability in general, but also useful in developing cost-effective, high-performance Ti-based bulk metallic glasses with enhanced glass-forming ability.

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“…The gas elements are usually discharged during the vacuum process. There have been relatively few studies on the effects of gas element composition on the GFA of BMGs, though a few recent studies have shown that microalloying with oxygen or nitrogen in certain alloy systems can improve the GFA [7][8][9] . The results of these studies altogether imply that certain gas elements play an important role in the GFA of BMGs.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-induced amorphization of Zr-Cu-Ni-Al alloy

Dong

Zhang

et al. 2017

China Foundry

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Male, born in 1984, Doctor. He has been working in the field of advanced metallic materials with amorphous/glassy structure and their composites. In particular, his research focuses on developing new bulk metallic glasses used as hydrogen penetrating materials and hydrogen storage materials. T he limited glass-forming ability (GFA) of metallic glass restricts its application as a structural material. Although many laboratories have reported the development of large-sized (in many cases, centimeterplus) bulk metallic glasses (BMGs), the actual number of alloys suitable for commercial production is quite low [1] . It is of considerable practical significance to enhance the GFA of existing BMG-forming alloys. For these alloy systems, the nature and number of components and purity of elements are critical factors in terms of GFA and mechanical properties [2] . The GFA and properties of BMGs are also quite sensitive to the material's composition. Therefore, minor alloying additions play an important role in the glass formation, thermal stability, and comprehensive properties of BMGs [3] .Various elements have been employed to change the Abstract: Arc melting was utilized in this study to produce Zr 55 Cu 30 Ni 5 Al 10 alloys under mixed atmospheres with various ratios of high-purity hydrogen to argon. The influences of hydrogen addition on the solidification structure and glass-forming ability of Zr 55 Cu 30 Ni 5 Al 10 alloy were determined by examining microstructures in different parts of the cast ingots. The results showed that different degrees of crystallization structures were obtained in the ascast button ingots after arc melting in high-purity Ar, and the cross-sectional solidification morphology of arcmelted ingots was found to consist of crystals with varying from the bottom up. By contrast, there were completely amorphous structures in the middle and upper areas of the as-cast button ingots fabricated by adding 10% H 2 to the high-purity Ar atmosphere. A clear solidification interface was found between the crystal and glass in the ascast button ingots, which indicates that hydrogen addition can enhance the Zr 55 Cu 30 Ni 5 Al 10 alloy's glass-forming ability. The precise mechanism responsible for this was also investigated.

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Nitrogen-doping effect on glass formation and primary phase selection in Cu–Zr–Al alloys

Cited by 28 publications

References 31 publications

Pronounced ductility in CuZrAl ternary bulk metallic glass composites with optimized microstructure through melt adjustment

Pronounced ductility in CuZrAl ternary bulk metallic glass composites with optimized microstructure through melt adjustment

Effects of Nitrogen on the Glass Formation and Mechanical Properties of a Ti-Based Metallic Glass

Hydrogen-induced amorphization of Zr-Cu-Ni-Al alloy

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