Phase-transition toughening of high-T
c superconducting ceramics

Siu, G. G.; Zeng, Wensheng

doi:10.1007/bf00365195

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…Not only that, the structural transition of nanoparticles plays a key role during the significant process of chemistry. As in the functional ceramics field, the structural transition of nanoparticles is used to enhance multiferroic and toughness of ceramic materials. , Indeed despite extensive studies of structural transition, − little attention has been devoted to the quantitative correlations between integral enthalpy, integral entropy, and sizes of nanoparticles. Hence, it is significant in science and practice to research and ascertain the effects of size of nanoparticles on thermodynamics of structural transition.…”

Section: Introductionmentioning

confidence: 99%

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe₂O₄

Zhang

Xue

Cui

2017

Ind. Eng. Chem. Res.

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Advances in the field of chemistry often involve nanoparticles, in which the structural transition is surprisingly different from the bulk material, and the difference between them is mainly attributed to the size of the nanoparticles. In this paper, tetragonal nano-CuFe 2 O 4 (t-CuFe 2 O 4 ) with different sizes ranging from 32 to 79 nm was prepared using the high temperature solid phase method. The structural transition of nano-CuFe 2 O 4 from tetragonal to cubic was determined by differential scanning calorimetry (DSC). The theoretical derivations and experimental tests indicate that, as the size decreases, the temperature, the enthalpy, and the entropy of the structural transition of nano-CuFe 2 O 4 decrease accordingly and present linear variation with the reciprocal of size, respectively. Furthermore, the effect of particle sizes on the magnetic properties of nano-CuFe 2 O 4 was investigated. The results show that the size of nano-CuFe 2 O 4 can obviously affect the magnetic properties: with the particle size of nano-CuFe 2 O 4 decreasing, the saturated magnetic induction decreases, the coercivity increases, while the remanence decreases.

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Section: Introductionmentioning

confidence: 99%

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe₂O₄

Zhang

Xue

Cui

2017

Ind. Eng. Chem. Res.

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“…In nonmetallic inorganic solids, LPTs have been observed in ferroelectric [51][52][53], antiferroelectric [28], superconductive [54] and martensitic ceramics [32,55,56]. A number of polymers exhibited stress-induced LPTs during fracture [57][58][59][60][61][62].…”

Section: Experimental Observations Of Crack Tip Process Zonesmentioning

confidence: 99%

Field-theoretical description of the formation of a crack tip process zone

Boulbitch

Korzhenevskii

2016

Eur. Phys. J. B

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The crack tip process zone is regarded as a region where the solid physical properties are altered due to high stress. They are controlled by the solid degrees of freedom existing within the zone and vanishing outside, and can be divided into two classes: (1) zones always existing at the tip and (2) those emerging as soon as certain conditions are met. We focus on the zones of the second kind and argue that they can be described analogously to phase transitions taking place locally. We report both a numerical and an analytical solution for the process zone. We find that the zone can only exist within a limited domain of the dynamic phase diagram, at one side of the phase transition line. We describe this domain and establish its dependence on the crack velocity. We show the existence of a critical crack velocity above which the zone cannot exist.

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Mechanical properties

Munro

2000

Handbook of Superconductivity

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Phase-transition toughening of high-T c superconducting ceramics

Cited by 8 publications

References 22 publications

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe₂O₄

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe₂O₄

Field-theoretical description of the formation of a crack tip process zone

Mechanical properties

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Phase-transition toughening of high-T c superconducting ceramics

Cited by 8 publications

References 22 publications

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe2O4

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe2O4

Field-theoretical description of the formation of a crack tip process zone

Mechanical properties

Contact Info

Product

Resources

About

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe₂O₄

Effect of Size on the Structural Transition and Magnetic Properties of Nano-CuFe₂O₄