Textured, dense and giant magnetostrictive alloy from fissile polycrystal

Gong, Yuanyuan; Wang, Dun-hui; Cao, Qingqi; Du, Youwei; Zhi, Ting; Zhao, Baoyu; Dai, Jianming; Sun, Yan; Zhou, Haibiao; Lu, Qingyou; Liu, Jian

doi:10.1016/j.actamat.2015.07.026

Cited by 39 publications

(15 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Mn-Co-Ge-based16, La-Fe-Co-Si42, and Co-Mn-Si2943 compounds, one of the most distinctive features is the pronounced NTE with a wide operation-temperature window, associated with a magneto-volume effect. From the high-temperature XRD measurements in Fig.…”

Section: Resultsmentioning

confidence: 99%

Magnetocaloric effect and negative thermal expansion in hexagonal Fe doped MnNiGe compounds with a magnetoelastic AFM-FM-like transition

Kuangdi

Liu

et al. 2017

Sci Rep

View full text Add to dashboard Cite

We report a detailed study of two successive first-order transitions, including a martensitic transition (MT) and an antiferromagnetic (AFM)-ferromagnetic (FM)-like transition, in Mn1-xFexNiGe (x = 0, 0.06, 0.11) alloys by X-ray diffraction, differential scanning calorimetry, magnetization and linear thermal expansion measurements. Such an AFM-FM-like transition occurring in the martensitic state has seldom been observed in the M(T) curves. The results of Arrott plot and linear relationship of the critical temperature with M2 provide explicit evidence of its first-order magnetoelastic nature. On the other hand, their performances as magnetocaloric and negative thermal expansion materials were characterized. The isothermal entropy change for a field change of 30 kOe reaches an impressive value of −25.8 J/kg K at 203 K for x = 0.11 compared to the other two samples. It demonstrates that the magneto-responsive ability has been significantly promoted since an appropriate amount of Fe doping can break the local Ni-6Mn AFM configuration. Moreover, the Fe-doped samples reveal both the giant negative thermal expansion and near-zero thermal expansion for different temperature ranges. For instance, the average thermal expansion coefficient ā of x = 0.06 reaches −60.7 × 10−6/K over T = 231–338 K and 0.6 × 10−6/K over T = 175–231 K during cooling.

show abstract

Section: Resultsmentioning

confidence: 99%

Magnetocaloric effect and negative thermal expansion in hexagonal Fe doped MnNiGe compounds with a magnetoelastic AFM-FM-like transition

Kuangdi

Liu

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…[23,24] The application of external fields has always acted as an effective method to modify the structures during the solidification process. [25][26][27][28][29] As we know, the application of a static magnetic field during the solidification process brings an unprecedented approach to realize the non-contact control of flows in the melt. [30][31][32] Normally, three extra forces in the liquid as well as the solid are introduced during solidification process.…”

Section: Introductionmentioning

confidence: 99%

EBSD Study of the Influence of a High Magnetic Field on the Microstructure and Orientation of the Al-Si Eutectic During Directional Solidification

Fautrelle

Gagnoud

et al. 2016

Metall Mater Trans A

View full text Add to dashboard Cite

International audienceThe effect of a high magnetic field on the morphology of the Al-Si eutectic was investigated using EBSD technology. The results revealed that the application of the magnetic field modified the morphology of the Al-Si eutectic significantly. Indeed, the magnetic field destroyed the coupled growth of the Al-Si eutectic and caused the formation of the divorced alpha-Al and Si dendrites at low growth speeds (a parts per thousand currency sign1 mu m/s). The magnetic field was also found to refine the eutectic grains and reduce the eutectic spacing at the initial growth stage. Moreover, the magnetic field caused the occurrence of the columnar-to-equiaxed transition of the alpha-Al phase in the Al-Si eutectic. The abovementioned effects were enhanced as the magnetic field increased. This result should be attributed to the magnetic field restraining the interdiffusion of Si and Al atoms in liquid ahead of the liquid/solid interface and the thermoelectric magnetic force acting on the eutectic lamellae under the magnetic field. (C) The Minerals, Metals & Materials Society and ASM International 201

show abstract

“…It is necessary to develop more practical magnetostrictive materials for engineering applications. Up to now, many room-temperature magnetostrictive materials such as rare-earth metals [ 2 ], Fe-Ga alloys [ 3 ], LaFeSi [ 4 ], NiMn-based alloys [ 5 , 6 , 7 ], and MnCoSi-based alloys have been developed [ 8 , 9 ]. The MnCoSi-based alloys are termed as the most promising candidate owing to their lower cost and higher magnetostrictive coefficient [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Large Cryogenic Magnetostriction Induced by Hydrostatic Pressure in MnCo0.92Ni0.08Si Alloy

et al. 2023

View full text Add to dashboard Cite

Giant magnetostriction could be achieved in MnCoSi-based alloys due to the magneto-elastic coupling accompanied by the meta-magnetic transition. In the present work, the effects of hydrostatic pressure on magnetostrictive behavior in MnCo0.92Ni0.08Si alloy have been investigated. The saturation magnetostriction (at 30,000 Oe) could be enhanced from 577 ppm to 5034 ppm by the hydrostatic pressure of 3.2 kbar at 100 K. Moreover, under a magnetic field of 20,000 Oe, the reversible magnetostriction was improved from 20 ppm to 2112 ppm when a hydrostatic pressure of 6.4 kbar was applied at 70 K. In all, it has been found that the magnetostrictive effect of the MnCo0.92Ni0.08Si compound is strongly sensitive to external hydrostatic pressure. This work proves that the MnCoSi-based alloys as a potential cryogenic magnetostrictive material can be modified through applied hydrostatic pressure.

show abstract

Textured, dense and giant magnetostrictive alloy from fissile polycrystal

Cited by 39 publications

References 43 publications

Magnetocaloric effect and negative thermal expansion in hexagonal Fe doped MnNiGe compounds with a magnetoelastic AFM-FM-like transition

Magnetocaloric effect and negative thermal expansion in hexagonal Fe doped MnNiGe compounds with a magnetoelastic AFM-FM-like transition

EBSD Study of the Influence of a High Magnetic Field on the Microstructure and Orientation of the Al-Si Eutectic During Directional Solidification

Large Cryogenic Magnetostriction Induced by Hydrostatic Pressure in MnCo0.92Ni0.08Si Alloy

Contact Info

Product

Resources

About