Synthesis and characterization of Fe-15 wt.% ZrO2 nanocomposite powders by mechanical milling

Raghavendra, K.; Dasgupta, Arup; Bhaskar, Pragna; Jayasankar, K.; Athreya, C.N.; Panda, Padmalochan; Saroja, S.; Sarma, V. Subramanya; Ramaseshan, R.

doi:10.1016/j.powtec.2015.10.003

Cited by 40 publications

(10 citation statements)

References 64 publications

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“…The supersaturated nanocrystalline solid solution of Mo (Tm, O) is formed after 96 h of ball milling in this system. This result differs from Raghavendra’s research, which showed that the diffraction peaks of the Fe and ZrO 2 phases could be still observed after 100 h of ball milling in a Fe (15 wt %) ZrO 2 system [ 19 ]. However, Toualbi reported the diffraction peak disappearance of the Y 2 O 3 phase in a Fe (9 wt %)-Cr (10 wt %) Y 2 O 3 system during ball milling was due to the dissolution of a very small number of yttria particles into the matrix to form a solid solution and to the amorphization of a large amount of Y 2 O 3 particles [ 20 ].…”

Section: Resultscontrasting

confidence: 97%

Microstructural Evolution, Thermodynamics, and Kinetics of Mo-Tm2O3 Powder Mixtures during Ball Milling

et al. 2016

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The microstructural evolution, thermodynamics, and kinetics of Mo (21 wt %) Tm2O3 powder mixtures during ball milling were investigated using X-ray diffraction and transmission electron microscopy. Ball milling induced Tm2O3 to be decomposed and then dissolved into Mo crystal. After 96 h of ball milling, Tm2O3 was dissolved completely and the supersaturated nanocrystalline solid solution of Mo (Tm, O) was obtained. The Mo lattice parameter increased with increasing ball-milling time, opposite for the Mo grain size. The size and lattice parameter of Mo grains was about 8 nm and 0.31564 nm after 96 h of ball milling, respectively. Ball milling induced the elements of Mo, Tm, and O to be distributed uniformly in the ball-milled particles. Based on the semi-experimental theory of Miedema, a thermodynamic model was developed to calculate the driving force of phase evolution. There was no chemical driving force to form a crystal solid solution of Tm atoms in Mo crystal or an amorphous phase because the Gibbs free energy for both processes was higher than zero. For Mo (21 wt %) Tm2O3, it was mechanical work, not the negative heat of mixing, which provided the driving force to form a supersaturated nanocrystalline Mo (Tm, O) solid solution.

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Section: Resultscontrasting

confidence: 97%

Microstructural Evolution, Thermodynamics, and Kinetics of Mo-Tm2O3 Powder Mixtures during Ball Milling

et al. 2016

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“…The supersaturated nanocrystalline solid solution of Mo (Tm, O) is formed after 96 h of ball milling in this system. This result differs from Raghavendra's research, which showed that the diffraction peaks of the Fe and ZrO2 phase could be still observed after 100 h of ball milling in a Fe-15wt%ZrO2 system [19]. However, Toualbi reported the diffraction peak disappearance of the Y2O3 phase in a Fe-9Cr-10%wt Y2O3 system during ball milling was due to the dissolution of a very small amount of yttria particles into matrix to form solid solution and to the amorphization of a large amount of Y2O3 particles [20].…”

Section: Phase Evolution and Microstructure Analysiscontrasting

confidence: 99%

Microstructural Evolution, Thermodynamics and Kinetics of Mo-Tm<sub>2</sub>O<sub>3</sub> Powder Mixtures during Ball Milling

Luo

Ran

Chen

et al. 2016

Preprint

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Abstract:The microstructural evolution, thermodynamics and kinetics of Mo-21%Tm2O3 (mass fraction, %) powder mixtures during ball milling were investigated using X-ray diffraction and transmission electron microscopy. Ball milling induced Tm2O3 to be decomposed and then dissolved into Mo crystal. The supersaturated nanocrystalline solid solution of Mo (Tm, O) was obtained after 96 h of ball milling. The elements of Mo, Tm and O were distributed uniformly in the ball-milled particles. Based on the semi-experimental theory of Miedema, a thermodynamic model was developed to calculate the driving force of phase evolution. There was no chemical driving force to form a crystal solid solution of Tm atoms in Mo crystal or an amorphous phase because the Gibbs free energy for both processes was higher than zero. For Mo-21%Tm2O3, it was mechanical work, not negative heat of mixing, that provided the driving force to form supersaturated nanocrystalline Mo (Tm, O) solid solution.

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“…where a is a numerical constant which is usually taken as 0.3-0.6, M Taylor's factor (2.78 for BCC), G is the shear modulus, b the Burgers vector, and q the dislocation density (0.89 9 10 14 m À2 ) as evaluated using the following equation 47,48 :…”

Section: Analysis Of Strengthening Mechanismsmentioning

confidence: 99%

Development of Fe-9Cr Alloy via High-Energy Ball Milling and Spark Plasma Sintering

Kundu

Sittiho

Charit

et al. 2019

JOM

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Iron and chromium powders were mixed and mechanically alloyed via highenergy ball milling for different time durations (2-20 h) to produce an alloy powder with a nominal composition of Fe-9Cr (wt.%). The milled Fe-9Cr powders were analyzed using scanning electron microscopy (SEM), x-ray diffraction (XRD) and transmission electron microscopy (TEM) to understand the impact of ball milling (BM) time on the characteristics of the milled powder. The optimized milled powder samples were then consolidated via spark plasma sintering (SPS) for different dwell times and temperatures. The density of consolidated samples was found to reach a maximum of 98%. Microstructural characterization of the SPS samples were performed using XRD, SEM, TEM and electron backscatter diffraction. This study highlights the principles and importance of high-energy BM and SPS of Fe-9Cr model alloy for the future development of more complex oxide dispersion-strengthened alloys for various applications including advanced nuclear reactor applications.

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Synthesis and characterization of Fe-15 wt.% ZrO2 nanocomposite powders by mechanical milling

Cited by 40 publications

References 64 publications

Microstructural Evolution, Thermodynamics, and Kinetics of Mo-Tm2O3 Powder Mixtures during Ball Milling

Microstructural Evolution, Thermodynamics, and Kinetics of Mo-Tm2O3 Powder Mixtures during Ball Milling

Microstructural Evolution, Thermodynamics and Kinetics of Mo-Tm<sub>2</sub>O<sub>3</sub> Powder Mixtures during Ball Milling

Development of Fe-9Cr Alloy via High-Energy Ball Milling and Spark Plasma Sintering

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