Precipitation of an icosahedral phase in amorphous Al90Fe5Ce5alloy

Zhang, Chuanjiang; Wu, Youshi; Cai, Xueling; Zhou, Guorong; Shi, Yang; Yang, Hua; Wu, Si

doi:10.1088/0953-8984/13/27/106

Cited by 7 publications

(10 citation statements)

References 22 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Together with our previous study on Al-Ni-Ce system [14], Alloys Ni > Co > Fe > Cu, which is different from the report by Zhang et al [16] in which values of GFA of Al-TM-Ce systems follow the sequence of Fe > Ni > Cu > Cr > Zn > Mn > Mg. The reason for such difference is that Lin et al did not pinpoint the optimum best glass-formers in each system and compare their GFA.…”

Section: The Distinct Roles Of Various Tm Elements On Glass Formationcontrasting

confidence: 99%

Influence of TM and RE elements on glass formation of the ternary Al–TM–RE systems

Yang

Wang

2008

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

Section: The Distinct Roles Of Various Tm Elements On Glass Formationcontrasting

confidence: 99%

Influence of TM and RE elements on glass formation of the ternary Al–TM–RE systems

Yang

Wang

2008

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…4 and 5 verify that the structural ordering comes from their liquid states and that the degree of local order in the amorphous solids can reflect the feature of the atomic ordering in the corresponding liquids. The previous work on different systems of alloys also gives the same suggestion [30,39,40]. It allows us to draw a conclusion that there exists more local ordering structure in the liquid of Cu 70 Hf 30 than in the other alloys with more Hf atoms.…”

Section: Discussionsupporting

confidence: 74%

“…Based on it, the relationship found here may be explained by using 'atomic size effect' in which strong chemical bonding causes the SRO or MRO structure to behave like a 'mega-atom' [40]. These mega-atoms will increase the degree of disorder in the system and lower the excess entropy of the liquid over the crystal, and prevent the liquid from crystallizing.…”

Section: Discussionmentioning

confidence: 84%

Degree of local structural ordering and its correlation with the glass forming ability of alloys

Bian

Wang

2006

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…Differential scanning calorimetry has proved to be the most effective method for characterising the kinetics of devitrivication including the nanocrystallisation in these amorphous alloys and is applied in a large number of studies, [75][76][77][78][79][80] although isothermal calorimetry has also been applied. 81 An instructive application of DSC to the study of devitrivication is the work by Gich et al 82 on the devitrivication of a range of rapidly solidified amorphous Al-Ni-Sm ternary alloys. The DSC curves of three of the alloys are shown in where amorphous9 signifies the amorphous phase with increased alloying content, resulting from the rejection of alloying elements from the a-Al phase.…”

Section: Defect Annihilation Recovery and Recrystallisation In Wrougmentioning

confidence: 99%

Analysis of aluminium based alloys by calorimetry: quantitative analysis of reactions and reaction kinetics

Starink¹

2004

International Materials Reviews

286

108

View full text Add to dashboard Cite

Differential scanning calorimetry (DSC) and isothermal calorimetry have been applied extensively to the analysis of light metals, especially Al based alloys. Isothermal calorimetry and differential scanning calorimetry are used for analysis of solid state reactions, such as precipitation, homogenisation, devitrivication and recrystallisation; and solid-liquid reactions, such as incipient melting and solidification, are studied by differential scanning calorimetry. In producing repeatable calorimetry data on Al alloys, sample preparation, reproducibility and baseline drift need to be considered in detail. Calorimetry can be used effectively to study the different solid state reactions and solid-liquid reactions that occur during the main processing steps of Al based alloys (solidification, homogenisation, precipitation). Also, devitrivication of amorphous and ultrafine grained Al based powders and flakes can be studied effectively. Quantitative analysis of the kinetics of reactions is assessed through reviewing the interrelation between activation energy analysis methods, equivalent time approaches, impingement parameter approaches, mean field models for precipitation, the Johnson-Mehl-Avrami-Kolmogorov model, as well as novel models which have not yet found application in calorimetry. Differential scanning calorimetry has occasionally been used in attempts to measure the volume fractions of phases present in Al based alloys, and attempts at determining volume fractions of intermetallic phases in commercial alloys and amounts of devitrified phase in glasses are reviewed. The requirements for the validity of these quantitative applications are also reviewed.Keywords: Differential scanning calorimetry, Precipitation, Aluminium, Modelling, Transformation IMR/419 IntroductionCalorimetry is an analysis technique that is part of a group of techniques collectively known as thermal analysis methods. In its broadest sense, thermal analysis refers to the measurement of changes in properties of substances under a controlled temperature program. Thermal analysis techniques can be classified according to the type of temperature program that the sample is subjected to and the measured (output) signal. The most commonly used temperature programs are either isothermal hold or heating (scanning) at constant rate, while more recently, temperature modulated scanning and reaction controlled heating have also found application. The signals measured in thermal analysis can include heat flows, temperature changes, mass, evolved gasses, length changes, elastic modulus, and many other properties that characterise properties or reactions of interest. Calorimetry refers to thermal analysis methods that measure the heat evolution from a sample under a controlled temperature program. The two most often applied calorimetry techniques are isothermal calorimetry and differential scanning calorimetry (DSC), which, as the name suggests, is by definition non-isothermal (i.e. a temperature scan). Apart from the more common applications to polymers,...

show abstract

Precipitation of an icosahedral phase in amorphous Al₉₀Fe₅Ce₅alloy

Cited by 7 publications

References 22 publications

Influence of TM and RE elements on glass formation of the ternary Al–TM–RE systems

Influence of TM and RE elements on glass formation of the ternary Al–TM–RE systems

Degree of local structural ordering and its correlation with the glass forming ability of alloys

Analysis of aluminium based alloys by calorimetry: quantitative analysis of reactions and reaction kinetics

Contact Info

Product

Resources

About