Effect of crystallization on corrosion behavior of Fe40Ni38B18Mo4 amorphous alloy in 3.5% sodium chloride solution

Wu, Yunfang; Chiang, Wen‐Chi; Wu, Jen Leih

doi:10.1016/j.matlet.2007.09.047

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…The boundaries are actually a discontinuous set of nanometer-scale pores that only appear as a continuous line at lower magnifications. Thus, the sample does not have continuous grain boundaries and can be expected to maintain superior corrosion resistance compared to a fully crystalline state [36][37][38][39][40][41][42]. The speckled appearance in the bulk of each grain corresponds to the nanocrystals formed during devitirifcation.…”

Section: Designing In Situ and Ex Situ Compositesmentioning

confidence: 99%

“…Fe-based metallic glasses and composites are of interest because they are less expensive than many other amorphous alloys [26], have yield strengths as high as 4 GPa [27,28], excellent magnetic properties [29][30][31][32][33][34], low coefficients of thermal expansion [35], excellent corrosion resistance [36][37][38][39][40][41][42], and can be used in a variety of applications [6,43,44]. Most Fe-based metallic glasses are based on an "80-20" rule, with approximately 80 at% metals (M) and 20 at% semimetals (S) and/or nonmetals (N), and is based on short range order that consists of distorted clusters with M:(N+S) ratios close to 80:20 [45].…”

Section: Introductionmentioning

confidence: 99%

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Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

et al. 2016

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Crystallization inhibits metallic glass forming in the super cooled liquid state and can be avoided if sufficiently fast heating rates can be obtained, but becomes increasingly difficult for marginal glass formers. We propose that dynamic pressing can enhance formability, and demonstrate that density of an iron-based marginal glass forming alloy (Fe 49.7 Cr 17.1 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 ) can be enhanced by coupling loading rate to fast heating rate during spark plasma sintering. We also describe the transformation kinetics for devitrification in a time-temperature-crystallinity diagram. The combination of coupled loading/fast heating and the time-temperature-crystallinity diagram define the processing requirements for obtaining a dense X-ray amorphous structure and can also be used to design a wide variety of dense in situ composites. Finally, we demonstrate that the design approach also applies to ex situ composites by adding microcrystalline W or Ta, enabling systematic control of atomic-, nano-, and micro-structure. This multi-scale structure control of bulk metallic glass composites has implications for developing a fundamental understanding of structure-property relationships. We expect this general approach will be applicable to other bulk metallic glass composites, and especially beneficial for marginal glass formers that are otherwise difficult to process.

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Section: Designing In Situ and Ex Situ Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

et al. 2016

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“…In addition to oxidation, the corrosion properties of the Pd, Fe and Cu based BMGs were also studied in Taiwan [83][84][85][86]. They evaluated the corrosion properties of these alloys in various aqueous solutions such as NaCl, HNO 3 , H 2 SO 4 , and HCl.…”

Section: Oxidation and Corrosionmentioning

confidence: 99%

“…They found that the alloys in amorphous state normally have better corrosion properties than those of crystalline state. For example, after crystallization by vacuum annealing at 650 C for 1 h, the corrosion resistance of the F 40 Ni 38 B 18 Mo 4 alloy under its crystalline state becomes inferior to its amorphous state [83]. But for some other cases, they also reported that the corrosion resistance of amorphous alloy can be improved about two to three times by annealing.…”

Section: Oxidation and Corrosionmentioning

confidence: 99%

Recent progress in metallic glasses in Taiwan

2009

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“…In fact, many metallic glasses exhibit different corrosion resistance or etching selectivity in certain states. Some Fe-based and Cu-based bulk metallic glass (BMG) alloys have been found to exhibit better corrosion properties in the amorphous state than that in the crystalline state343536. In other cases, the corrosion resistance of some Pd-based and Fe-based BMGs amorphous alloys can be improved by annealing373839.…”

Section: Discussionmentioning

confidence: 99%

Metallic resist for phase-change lithography

Zeng

Huang

et al. 2014

Sci Rep

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Currently, the most widely used photoresists in optical lithography are organic-based resists. The major limitations of such resists include the photon accumulation severely affects the quality of photolithography patterns and the size of the pattern is constrained by the diffraction limit. Phase-change lithography, which uses semiconductor-based resists such as chalcogenide Ge2Sb2Te5 films, was developed to overcome these limitations. Here, instead of chalcogenide, we propose a metallic resist composed of Mg58Cu29Y13 alloy films, which exhibits a considerable difference in etching rate between amorphous and crystalline states. Furthermore, the heat distribution in Mg58Cu29Y13 thin film is better and can be more easily controlled than that in Ge2Sb2Te5 during exposure. We succeeded in fabricating both continuous and discrete patterns on Mg58Cu29Y13 thin films via laser irradiation and wet etching. Our results demonstrate that a metallic resist of Mg58Cu29Y13 is suitable for phase change lithography, and this type of resist has potential due to its outstanding characteristics.

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Effect of crystallization on corrosion behavior of Fe40Ni38B18Mo4 amorphous alloy in 3.5% sodium chloride solution

Cited by 13 publications

References 12 publications

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

Recent progress in metallic glasses in Taiwan

Metallic resist for phase-change lithography

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