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The Elastocaloric Effect: A Way to Cool Efficiently
General information Publication status: Published Organisations: Department of Energy Conversion and Storage, Electrofunctional materials, Department of Wind Energy, Composites Mechanics and
Statistical similarity between the compression of a porous material and earthquakes.
The acoustic emission events produced during the compression of Vycor (SiO(2) are studied to show that the waiting-time distribution fulfills a unified scaling law with a power-law exponent close to 2.45 for long times, which is explained in terms of the temporal variations of the activity rate.
Elastocaloric effect associated with the martensitic transition in shape-memory alloys.
The elastocaloric effect in the vicinity of the martensitic transition of a Cu-Zn-Al single crystal has been studied by inducing the transition by strain or stress measurements and the values agree with estimations based on the Clausius-Clapeyron equation.
Large temperature span and giant refrigerant capacity in elastocaloric Cu-Zn-Al shape memory alloys
We report on the elastocaloric effect in a Cu-Zn-Al shape memory alloy. We show that both the isothermal entropy and adiabatic temperature changes are large and reproducible upon field cycling over a
Avalanches in compressed porous SiO(2)-based materials.
The energy of acoustic emission events, its duration, and waiting times between events show that the failure process follows avalanche criticality with power law statistics over ca.
Experimental Evidence for Universality of Acoustic Emission Avalanche Distributions during Structural Transitions
Acoustic emission avalanche distributions are studied in different alloy systems that exhibit a phase transition from a bcc to a close-packed structure. After a small number of thermal cycles through
Analysis of power-law exponents by maximum-likelihood maps.
  • J. Baró, E. Vives
  • Mathematics, Physics
    Physical review. E, Statistical, nonlinear, and…
  • 9 February 2012
In the different examples, the nature of the deviations observed in the exponent maps are discussed and some relevant conclusions are drawn for the physics behind each phenomenon.
Kinetics of martensitic transitions in Cu-Al-Mn under thermal cycling: Analysis at multiple length scales
In this paper we study the evolution of the kinetic features of the martensitic transition in a Cu-Al-Mn single crystal under thermal cycling. The use of several experimental techniques including
Statistical mechanics in the extended Gaussian ensemble.
The extended Gaussian ensemble (EGE) is introduced as a generalization of the canonical ensemble and the Legendre transform structure for the generalized thermodynamic potential and a stability criterion is established.