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Experimental observation of vacancy assisted martensitic transformation shift in Ni-Fe-Ga alloys
(APS, 2019-04-23)
[EN] Positron annihilation lifetime spectroscopy is used to experimentally demonstrate the direct relationship between vacancies and the shift of the martensitic transformation temperature in a Ni55Fe17Ga28 alloy. The ...
Low temperature magnetic properties of a Ni50Mn34In16 ball-milled metamagnetic shape memory alloy
(Elsevier, 2016-09-01)
[EN] The effect of the atomic disorder induced by ball-milling on the structure and the magnetic properties has been analyzed in a Ni50Mn34In16 metamagnetic shape memory alloy. The as-milled samples displayed an amorphous ...
Mechanically induced disorder and crystallization process in Ni-Mn-In ball-milled alloys
(Elsevier, 2016-12-25)
[EN] High mechanical deformation has been induced in a Ni-Mn-In metamagnetic shape memory alloy by means of ball milling. The evolution of both the martensitic transformation and the magnetic properties associated to the ...
Retrieving the thermal diffusivity and effusivity of solids from the same frequency scan using the front photopyroelectric technique
(IOP Science, 2017-09-14)
The photopyroelectric (PPE) technique in the front configuration consists in illuminating one
surface of a pyroelectric slab while the other surface is in contact with the test sample. This
method has been widely used ...
Measuring the thermal resistance of vertical interfaces separating two different media using infrared thermography
(Elsevier, 2019)
We propose a method to measure the thermal contact resistance at the vertical interface between two materials using lock-in infrared thermography with laser spot heating. We found an analytical expression for the surface ...
Magnetocaloric properties and unconventional critical behavior in (Gd,Tb)6(Fe,Mn)Bi2 intermetallics
(Elsevier, 2020-06-17)
The magnetic and magnetocaloric properties of the intermetallic family (Gd,Tb)6(Fe,Mn)Bi2 have been studied from 2 K to temperatures above the respective Curie temperatures TC. The substitution of Gd by Tb (Gd6FeBi2, ...
Comprehensive study of the magnetic phase transitions in Tb3Co combining thermal, magnetic and neutron diffraction measurements
(Elsevier, 2019-05-22)
A comprehensive study of the magnetic phase transitions in Tb3Co has been undertaken combining different techniques. Using single crystal neutron diffraction in the paramagnetic state a weak crystal structure distortion ...
Fast sizing of the width of infinite vertical cracks using constant velocity Flying-Spot thermography
(Elsevier, 2019-03-19)
Constant Velocity Flying-Spot thermography consists in scanning the sample surface by a focused CW-laser spot moving at constant speed. This technique was designed to study large surfaces in short times. In this work, we ...
Sizing the length of surface breaking cracks using vibrothermography
(Elsevier, 2020-03-16)
Ultrasound excited thermography is used to determine the length of vertical surface breaking cracks. Two methods are proposed based on the analysis of the maximum temperature reached along the line containing the crack and ...
Characterizing the shape and heat production of open vertical cracks in burst vibrothermography experiments
(Elsevier, 2019)
We present a quantitative characterization of the heat flux distribution generated at open vertical cracks in burstvibrothermography experiments. We use a stabilized inversion algorithm that is able to retrieve both ...