Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
DESIGN AND DEVELOPMENT OF HEUSLER ALLOYS FOR MAGNETIC REFRIGERATION APPLICATIONS
Date
2019-01-01
Author
Mehrabov, Amdulla
Akdeniz, Mahmut Vedat
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
414
views
0
downloads
Cite This
Cooling systems are used in houses, cars, hospitals, defence systems and many other such areas. However, the gases (chlorofluorocarbons and hydrochlorofluorocarbons) present in today's refrigerant systems are harmful to the environment and cause global warming. Moreover, today's cooling technology is expensive and low efficiency technology. Therefore, new and cost-effective with higher energy efficiencies cooling systems have begun to be developed to eliminate the use of these harmful gases. Among them, magnetic refrigeration has attracted increasing interest in the materials research communities because of its higher cooling efficiency and environmentally friendliness. Full Heusler alloys are magnetic ternary intermetallic compounds with the L2(1)-type crystal structure. Typically, these alloys undergo a low temperature martensitic transformation (austenite martensite), a magnetic transformation (ferromagnetic paramagnetic) and relatively high temperature atomic ordering (order order and order disorder) transformations. After the discovery of the ferromagnetic shape memory (FSM) and giant magnetocaloric effects (GMCE) in Ni-Mn-Ga alloy, Ni-Mn based Heusler alloys have received considerable attention due to their unique magnetic and structural properties. In this present study compositional dependence of structural and magnetic properties of off-stoichiometric Ni-rich Ni-Mn-Ga Heusler alloys have been investigated, in order to determine an alloy composition where a coupled magneto -structural transformation occurs and to measure the MCE near this temperature. Structural and magnetic properties of Ni-Mn-Ga Heusler alloy system were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) measurements.
Subject Keywords
Magnetic refrigeration
,
Relative cooling power
,
Magnetocaloric effect
,
Ni-based hensler alloys
URI
https://hdl.handle.net/11511/53011
Conference Name
International Conference on Modern Trends in Physics
Collections
Department of Metallurgical and Materials Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Design and Development of Heusler Alloys for Magnetic Refrigeration Applications
Mehrabov, Amdulla; Akdeniz, Mahmut Vedat (2019-05-01)
Cooling systems are used in houses, cars, hospitals, defence systems and many other such areas. However, the gases (chlorofluorocarbons and hydrochlorofluorocarbons) present in today's refrigerant systems are harmful to the environment and cause global warming. Moreover, today's cooling technology is expensive and low-efficiency technology. Therefore, new and cost-effective with higher energy efficiencies cooling systems have begun to be developed to eliminate the use of these harmful gases. Among them...
Modeling the effect of dose rate and time on crosslinking and scission in irradiated polyethylene
Sargın, Irmak; Beckman, S. P. (2020-06-01)
The insulation around the electrical cabling in nuclear power plants is frequently made of ethylene-propylene rubber and crosslinked polyethylene that is subjected to low levels of environmental stressors and radiation over the duration of their decades long service life. For the purpose of maintenance and reactor recertification, it is necessary to develop a non-destructive approach to determine the degree of damage the insulation has sustained. Accelerated aging experiments are used to develop these metho...
Evaluation of a Tunnel Form Social Housing Unit Based on Passive Design Principles
Yılmaz, Deniz Derya; Tanyer, Ali Murat (null; 2015-05-28)
Many countries developed methods for the definition of houses with a very low energy use in the past years, among which Passive House represents a dwelling with extremely thermal insulated external envelope, good air tightness and highly efficient ventilation heat recovery to reduce energy consumption of buildings greatly depending on the location. This paper is carried out to see if it is possible to design tunnel-form structures as Passive House buildings. Also in this paper, construction of a Passive Hou...
Implementation and evaluation of the dynamic distributed real time industrial protocol (D²RIP)
Kaya, Adem; Eyüboğlu, Behçet Murat; Department of Electrical and Electronics Engineering (2013)
The contemporary large-scale and complex industrial control systems such as manufacturing systems, power plants or chemical processes are realized as distributed systems. Since different controller nodes are usually physically distributed, their coordination and information exchange is commonly realized via industrial communication networks (ICNs). In the last decade, there is an ongoing research effort in both academic and industrial fields to employ Ethernet for industrial communications due to its wide a...
DEVELOPMENT OF POLYMER MATRIX COMPOSITES WITH TUNABLE DIELECTRIC PROPERTIES
Özkaragöz, Nadire Nazlı; Dericioğlu, Arcan Fehmi; Department of Metallurgical and Materials Engineering (2022-2-08)
Ferroelectric materials are used in different applications because of their superior electrical and dielectric properties. Ferroelectric materials are polarized when an electrical field is applied to the material. This spontaneous polarization continues even if an electrical field is removed. BST (Barium Strontium Titanate) is one of the attractive ferroelectric materials which has a high dielectric constant and low dielectric loss tangent (tanδ). High dielectric constant and low loss tangent are necessary ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
A. Mehrabov and M. V. Akdeniz, “DESIGN AND DEVELOPMENT OF HEUSLER ALLOYS FOR MAGNETIC REFRIGERATION APPLICATIONS,” presented at the International Conference on Modern Trends in Physics, Baku State Univ, Baku, AZERBAIJAN, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53011.