Search results for: N.H. van Dijk

Items from 1 to 20 out of 73 results

article

Transition metal substitution in Fe2P-based MnFe0.95P0.50Si0.50 magnetocaloric compounds

Z.Q. Ou, N.H. Dung, L. Zhang, L. Caron, more

Journal of Alloys and Compounds > 2018 > 730 > C > 392-398

The crystal structure, magnetic and magnetocaloric properties of (Mn,Fe,T)_1.95P_0.50Si_0.50 (T = Co, Ni and Cu) compounds have been investigated. All the compounds crystallize in the Fe₂P-type hexagonal structure. All these transition metal substitutions for either Mn(3g) or Fe(3f) weaken the ferromagnetic ordering, while showing complex effects on the energy barrier for nucleation in the first-order...

article

On the phase stability of CaCu5-type compounds

M.F.J. Boeije, E.K. Delczeg-Czirjak, N.H. van Dijk, O. Eriksson, more

Journal of Alloys and Compounds > 2017 > 722 > C > 549-554

We present a hybrid method to inspect the phase stability of compounds having a CaCu₅-type crystal structure. This is done using 2D stability plots using the Miedema parameters that are based on the work function and electron density of the constituent elements. Stable compounds are separated from unstable binary compounds, with a probability of 94%. For stable compounds, a linear relation is found,...

article

Structural and magnetic properties of hexagonal (Mn,Fe)3-δGa

M.F.J. Boeije, L. van Eijck, N.H. van Dijk, E. Brück

Journal of Magnetism and Magnetic Materials > 2017 > 433 > C > 297-302

We have investigated the crystallographic and magnetic properties of (Mn,Fe)3-δGa alloys. The hexagonal phase is stable between 600 and 700°C and can be stabilized by quenching to room temperature. Mn₃Ga is reported to be off-stoichiometric, but we show that using melt-spinning the stoichiometric compound is attainable. Below the antiferromagnetic transition temperature TN, the crystal undergoes a...

article

Effect of heat treatment conditions on MnFe(P,Si,B) compounds for room-temperature magnetic refrigeration

N.V. Thang, H. Yibole, N.H. van Dijk, E. Brück

Journal of Alloys and Compounds > 2017 > 699 > C > 633-637

Mn_1.000Fe_0.950P_0.595Si_0.330B_0.075 compounds have been synthesized by high-energy ball milling and a subsequent solid-state reaction. The influence of the sintering conditions on the magnetic phase transition of Mn_1.00Fe_0.95P_0.595Si_0.33B_0.075 samples has been systematically investigated using X-ray diffraction and magnetic measurements. The experimental results show that all the samples obtained after...

article

Autonomous filling of creep cavities in Fe-Au alloys studied by synchrotron X-ray nano-tomography

H. Fang, C.D. Versteylen, S. Zhang, Y. Yang, more

Acta Materialia > 2016 > 121 > C > 352-364

The autonomous filling of creep-loading induced grain-boundary cavities by gold-rich precipitates at a temperature of 550 °C has been studied as a function of the applied load for Fe-Au alloys using synchrotron X-ray nano-tomography. The alloy serves as a model alloy for future self-healing creep resistant steels. The size, shape and spatial distribution of cavities and precipitates are analyzed quantitatively...

article

Tuning the magnetoelastic transition in (Mn,Fe)2(P,Si) by B, C, and N doping

X.F. Miao, N.V. Thang, L. Caron, H. Yibole, more

Scripta Materialia > 2016 > 124 > C > 129-132

The critical temperature and first-order character of the magnetoelastic transition in (Mn,Fe)₂(P,Si) are tunable by doping the structure with B, C and N atoms. Neutron diffraction experiments reveal that B substitutes Si on the 1b site of the hexagonal P-62m structure, C occupies the interstitial 6j and 6k sites, while N distributes on both the 1b and interstitial 6j and 6k sites. The tuning mechanism...

article

Structural and magnetocaloric properties of (Mn,Fe)2(P,Si) materials with added nitrogen

N.V. Thang, X.F. Miao, N.H. van Dijk, E. Brück

Journal of Alloys and Compounds > 2016 > 670 > C > 123-127

Amongst magnetic materials that exhibit a giant magnetocaloric effect near room temperature, the (Mn,Fe)₂(P,Si) system is one of the most promising candidates for magnetic refrigeration. Although the (Mn,Fe)₂(P,Si) materials hold many advantages, controlling the magnetic entropy change ΔS_m, the adiabatic temperature change ΔT_ad, the thermal hysteresis and the mechanical stability across the ferromagnetic...

article

Influence of thermal conductivity on the dynamic response of magnetocaloric materials

G. Porcari, K. Morrison, F. Cugini, J.A. Turcaud, more

International Journal of Refrigeration > 2015 > 59 > Complete > 29-36

We compare the magnetocaloric effect of samples prepared with different thermal conductivities to investigate the potential of composite materials. By applying the magnetic field under operating conditions we test the material's response and compare this to heat transfer simulations in order to check the reliability of the adiabatic temperature change probe used. As a result of this study we highlight...

article

Effect of boron substitution on the ferromagnetic transition of MnFe0.95P2/3Si1/3

F. Guillou, H. Yibole, N.H. van Dijk, E. Brück

Journal of Alloys and Compounds > 2015 > 632 > C > 717-722

The changes in structural, magnetic and calorimetric properties induced by B substitution of P or Si in MnFe_0.95P_2/3Si_1/3 are reported. The evolution of the structure and in particular of the ratio in cell parameters c/a is specific to the B substitution. The disappearance of the first-order magnetic transition (FOMT) with B substitution is shown to be systematic and much more pronounced than observed...

article

Effects of Milling Conditions on Nano-scale MnFe(P,Si) Particles by Surfactant-assisted High-energy Ball Milling

N.V. Thang, N.H. van Dijk, E. Brück

Physics Procedia > 2015 > 75 > C > 1104-1111

The influence of the milling conditions on the nano-scale MnFe(P,Si) particles obtained by surfactant-assisted high-energy ball milling has been investigated by X-ray diffraction (XRD) and magnetic measurements. The presence of surfactant oleic acid prevents the re-welding of crushed particles and enhances the dispersion of nanoparticles in the solvent during the ball milling. The XRD peak intensities...

article

About the mechanical stability of MnFe(P,Si,B) giant-magnetocaloric materials

F. Guillou, H. Yibole, N.H. van Dijk, L. Zhang, more

Journal of Alloys and Compounds > 2014 > 617 > C > 569-574

Due to its ability to control the latent heat and the hysteresis (thermal or magnetic) at the first-order transition (FOT) without deteriorating the saturation magnetisation, boron substitution in MnFe(P,Si) materials has recently been reported to be an ideal parameter to reach promising magnetocaloric performances: ΔS≈10Jkg⁻¹K⁻¹ and cyclic ΔT of 2.6K (and more) at a moderate magnetic field of ΔB=1T...

article

Mechanical stability of individual austenite grains in TRIP steel studied by synchrotron X-ray diffraction during tensile loading

R. Blondé, E. Jimenez-Melero, L. Zhao, J.P. Wright, more

Materials Science and Engineering: A > 2014 > 618 > C > 280-287

The stability of individual metastable austenite grains in low-alloyed TRIP steels has been studied during tensile loading using high-energy X-ray diffraction. The carbon concentration, grain volume and grain orientation with respect to the loading direction was monitored for a large number of individual grains in the bulk microstructure. Most austenite grains transform into martensite in a single...

article

The mechanical stability of retained austenite in low-alloyed TRIP steel under shear loading

R. Blondé, E. Jimenez-Melero, L. Zhao, N. Schell, more

Materials Science & Engineering A > 2014 > 594 > Complete > 125-134

The microstructure evolution during shear loading of a low-alloyed TRIP steel with different amounts of the metastable austenite phase and its equivalent DP grade has been studied by in-situ high-energy X-ray diffraction. A detailed powder diffraction analysis has been performed to probe the austenite-to-martensite transformation by characterizing simultaneously the evolution of the austenite phase...

article

Preferential Au precipitation at deformation-induced defects in Fe–Au and Fe–Au–B–N alloys

S. Zhang, G. Langelaan, J.C. Brouwer, W.G. Sloof, more

Journal of Alloys and Compounds > 2014 > 584 > Complete > 425-429

The influence of deformation-induced defects on the isothermal precipitation of Au was studied in high-purity Fe–Au and Fe–Au–B–N alloys. Preferential Au precipitation upon annealing at 550°C is observed at local plastic indentations. In fractured Fe–Au–B–N, solute Au atoms were found to heterogeneously precipitate at grain boundaries and local micro-cracks. This is supported by in-situ creep tests...

article

Defect-induced Au precipitation in Fe–Au and Fe–Au–B–N alloys studied by in situ small-angle neutron scattering

S. Zhang, J. Kohlbrecher, F.D. Tichelaar, G. Langelaan, more

Acta Materialia > 2013 > 61 > 18 > 7009-7019

Nanoscale Au precipitation in high-purity Fe–Au and Fe–Au–B–N alloys has been studied by in situ small-angle neutron scattering during isothermal aging at 550°C and complementary ex situ transmission electron microscopy. The high temperature precipitation behavior in samples having received different degrees of cold deformation has been studied to explore the potential self-healing of deformation-induced...

article

Neutron diffraction study on the magnetic structure of Fe2P-based Mn0.66Fe1.29P1−xSix melt-spun ribbons

Z.Q. Ou, L. Zhang, N.H. Dung, L. van Eijck, more

Journal of Magnetism and Magnetic Materials > 2013 > 340 > Complete > 80-85

We report on the magnetic and structural properties of Mn _0.66 Fe _1.29 P _1−x Si _x melt-spun ribbons with 0.34≤x≤0.42 that are promising candidates for high-temperature magnetocaloric applications. A magnetic moment of up to 4.57μ _B /f.u. for x=0.34 indicates high magnetic density in the system, which is certainly advantageous for the magnetocaloric effects....

article

Time-dependent synchrotron X-ray diffraction on the austenite decomposition kinetics in SAE 52100 bearing steel at elevated temperatures under tensile stress

E. Jimenez-Melero, R. Blondé, M.Y. Sherif, V. Honkimäki, more

Acta Materialia > 2013 > 61 > 4 > 1154-1166

We have studied the decomposition kinetics of the metastable austenite phase present in quenched-and-tempered SAE 52100 steel by in situ high-energy synchrotron X-ray diffraction experiments at elevated temperatures of 200–235°C under a constant tensile stress. We have observed a continuous decomposition of austenite into ferrite and cementite. The decomposition kinetics is controlled by the long-range...

article

High-energy X-ray diffraction study on the temperature-dependent mechanical stability of retained austenite in low-alloyed TRIP steels

R. Blondé, E. Jimenez-Melero, L. Zhao, J.P. Wright, more

Acta Materialia > 2012 > 60 > 2 > 565-577

The stability of the retained austenite has been studied in situ in low-alloyed transformation-induced-plasticity (TRIP) steels using high-energy X-ray diffraction during tensile tests at variable temperatures down to 153K. A detailed powder diffraction analysis has been performed to probe the austenite-to-martensite transformation by characterizing the evolution of the phase fraction, load partitioning...

article

In situ synchrotron study on the interplay between martensite formation, texture evolution and load partitioning in low-alloyed TRIP steels

E. Jimenez-Melero, N.H. van Dijk, L. Zhao, J. Sietsma, more

Materials Science & Engineering A > 2011 > 528 > 21 > 6407-6416

We have studied the micromechanical behaviour of two low-alloyed multiphase TRIP steels with different aluminium contents by performing in situ high-energy X-ray diffraction experiments at a synchrotron source under increasing tensile stress levels. A detailed analysis of the two-dimensional diffraction data has allowed us to unravel the interplay between the martensite formation, the texture evolution...

article

Real-time martensitic transformation kinetics in maraging steel under high magnetic fields

D. San Martin, N.H. van Dijk, E. Jiménez-Melero, E. Kampert, more

Materials Science & Engineering A > 2010 > 527 > 20 > 5241-5245

We have monitored the isothermal transformation kinetics of the austenite phase into the martensite phase in a metastable austenitic maraging steel by time-dependent magnetization measurements for temperatures from 4 to 298K and continuous applied magnetic fields up to 30T. The transformation kinetics is shown to be accelerated by several orders of magnitude when high magnetic fields are applied....

Publication date

Set your own date range

INFONA - science communication portal

Search results for: N.H. van Dijk

Transition metal substitution in Fe2P-based MnFe0.95P0.50Si0.50 magnetocaloric compounds

On the phase stability of CaCu5-type compounds

Structural and magnetic properties of hexagonal (Mn,Fe)3-δGa

Effect of heat treatment conditions on MnFe(P,Si,B) compounds for room-temperature magnetic refrigeration

Autonomous filling of creep cavities in Fe-Au alloys studied by synchrotron X-ray nano-tomography

Tuning the magnetoelastic transition in (Mn,Fe)2(P,Si) by B, C, and N doping

Structural and magnetocaloric properties of (Mn,Fe)2(P,Si) materials with added nitrogen

Influence of thermal conductivity on the dynamic response of magnetocaloric materials

Effect of boron substitution on the ferromagnetic transition of MnFe0.95P2/3Si1/3

Effects of Milling Conditions on Nano-scale MnFe(P,Si) Particles by Surfactant-assisted High-energy Ball Milling

About the mechanical stability of MnFe(P,Si,B) giant-magnetocaloric materials

Mechanical stability of individual austenite grains in TRIP steel studied by synchrotron X-ray diffraction during tensile loading

The mechanical stability of retained austenite in low-alloyed TRIP steel under shear loading

Preferential Au precipitation at deformation-induced defects in Fe–Au and Fe–Au–B–N alloys

Defect-induced Au precipitation in Fe–Au and Fe–Au–B–N alloys studied by in situ small-angle neutron scattering

Neutron diffraction study on the magnetic structure of Fe2P-based Mn0.66Fe1.29P1−xSix melt-spun ribbons

Time-dependent synchrotron X-ray diffraction on the austenite decomposition kinetics in SAE 52100 bearing steel at elevated temperatures under tensile stress

High-energy X-ray diffraction study on the temperature-dependent mechanical stability of retained austenite in low-alloyed TRIP steels

In situ synchrotron study on the interplay between martensite formation, texture evolution and load partitioning in low-alloyed TRIP steels

Real-time martensitic transformation kinetics in maraging steel under high magnetic fields

Filter options

Publication date

Content availability

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: N.H. van Dijk

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options