On the determination of nucleation and growth kinetics by calorimetry

Michaelsen, C.; Dahms, Michael

doi:10.1016/s0040-6031(96)03039-0

Cited by 57 publications

(47 citation statements)

References 19 publications

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“…In these measurements the degree of crystallinity was determined from the exothermic heat loss results. [ 57 ] In order to quantify the DSC results, the instrument was calibrated with calibration standards (Netzsch 6.223.5-91.2) of known heat absorption for melting points or phase changes. The as-deposited amorphous CeO 2 thin fi lms were scratched off from the sapphire substrate and the obtained powder was analyzed by DSC.…”

Section: Ttt-diagramsmentioning

confidence: 99%

Time–Temperature–Transformation (TTT) Diagrams for Crystallization of Metal Oxide Thin Films

Rupp

Scherrer

Schäuble

et al. 2010

Adv Funct Materials

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Section: Ttt-diagramsmentioning

confidence: 99%

Time–Temperature–Transformation (TTT) Diagrams for Crystallization of Metal Oxide Thin Films

Rupp

Scherrer

Schäuble

et al. 2010

Adv Funct Materials

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“…Layered systems studied by calorimetry include: Nb/Al, 84,85 Ti/Al, 86 Ni/Al, 87 Zr/Al, 7 and Co/Al. 88 Isothermal calorimetry and DSC have been employed to study the reaction between ceramic reinforcements and Al matrix in Al based composites.…”

Section: Multilayers and Interfacial Reactionsmentioning

confidence: 99%

“…Also, calorimetry data on reactions in multilayers are generally investigated using the JMAK model. 7,86 In such an approach, the determination of the reaction model f(a) is reduced to finding the Avrami exponent n.…”

mentioning

confidence: 99%

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

Starink¹

2004

International Materials Reviews

286

108

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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,...

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“…Crystallization behavior during constant and isothermal heating treatments has been studied by many researchers, [13][14][15][16] on the basis of driving force and the mechanism using Kissinger and Avrami plots. However, these kinetic analyses have not applied directly to the estimation of the crystallization behavior as a function of annealing temperature and time.…”

Section: Introductionmentioning

confidence: 99%

Annealing-Induced Devitrification Behavior of a Ti47.4Zr5.3Ni5.3Cu42.0 Glassy Alloy

et al. 2007

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We have investigated devitrification behavior, accompanied by glass transition and precipitation of crystallites, as a function of annealing temperature and time for a Ti 47:4 Zr 5:3 Ni 5:3 Cu 42:0 glassy alloy sheet, together with embrittlement behavior using bending fracture strain test. From kinetic analysis in one DSC profile under a constant heating rate, we can easily estimate the devitrification with temperature and time upon annealing. The glassy alloy became brittle during progressive devitrification in accordance with kinetic estimation. In sharp contrast with a Zr 55 Al 10 Ni 5 Cu 30 glassy alloy, all the precipitations of crystallites (Cu 4 Ti 3 , Ti and CuTi) occur above glass transition temperature (Tg). We found that the Ti-based glassy alloy has large structurally and thermally stable area, which does not brittle up to 1:10 Â 10 4 s at 650 K and 1:29 Â 10 10 s at 600 K, by experiment and kinetic estimation, respectively.

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On the determination of nucleation and growth kinetics by calorimetry

Cited by 57 publications

References 19 publications

Time–Temperature–Transformation (TTT) Diagrams for Crystallization of Metal Oxide Thin Films

Time–Temperature–Transformation (TTT) Diagrams for Crystallization of Metal Oxide Thin Films

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

Annealing-Induced Devitrification Behavior of a Ti<SUB>47.4</SUB>Zr<SUB>5.3</SUB>Ni<SUB>5.3</SUB>Cu<SUB>42.0</SUB> Glassy Alloy

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