An efficient scheme to tailor the magnetostructural transitions by staged quenching and cyclical ageing in hexagonal martensitic alloys

Li, Yong; Zeng, Qingqi; Wei, Zheng; Liu, Enke; Han, Xiao; Du, Zhiwei; Li, Lingwei; Xi, Xuekui; Wang, Wenhong; Wang, Shouguo; Wu, Guangheng

doi:10.1016/j.actamat.2019.05.042

Cited by 38 publications

(17 citation statements)

References 63 publications

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“…Usually, to calculate ΔS M based on the MST with thermal hysteresis, the temperature loop method [10,42,45,46] is used to measure isothermal magnetization curves around MST to avoid misestimating ΔS M . Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Fig. 4b shows the comparison of ΔS M between present ribbon (star) and other compounds (some conventional and all-d-metal magnetic refrigeration materials with MST, triangle) [7,8,17,19,21,24,41,46,[48][49][50] with ΔH of 20 kOe. The value at 0.35 GPa is larger than 15.00 J (kg K) −1 and is comparable to and even larger than the other, such as 14.00 J (kg K) −1 for Gd 5 (Si 2 Ge 2 ) [49], 14.30 J (kg K) −1 for LaFe 11.4 Si 1.6 [7]…”

Section: Resultsmentioning

confidence: 99%

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Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

Qin

Huang

et al. 2021

Sci. China Mater.

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The solid-state magnetic cooling (MC) method based on the magnetocaloric effect (MCE) is recognized as an environmentally friendly and high-energy-efficiency technology. The search or design of suitable magnetic materials with large MCEs is one of the main targets at present. In this work, we apply the chemical and hydrostatic pressures in the Ni 35 Co 15 Mn 35−x Fe x Ti 15 all-d-metal Heusler alloys and systematically investigate their crystal structures, phases, and magnetocaloric performances experimentally and theoretically. All the alloys are found to crystallize in an ordered B2-type structure at room temperature and the atoms of Fe are confirmed to all occupy at sites Mn(B). The total magnetic moments decrease gradually with increasing Fe content and decreasing of volume as well. The martensitic transformation temperature decreases with the increase of Fe content, whereas increases with increasing hydrostatic pressure. Moreover, obviously enhanced magnetocaloric performances can also be obtained by applied pressures. The maximum values of magnetic entropy change and refrigeration capacity are as high as 15.61(24.20) J (kg K) −1 and 109.91(347.26) J kg −1 with ΔH = 20(50) kOe, respectively. These magnetocaloric performances are superior to most of the recently reported famous materials, indicating the potential application for active MC.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

Qin

Huang

et al. 2021

Sci. China Mater.

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“…它的相变温度高于体系的磁有序温度 [4] , 研究者因此采用了各种调控方法来实现磁共结构耦合. (1) 过渡金属空位: 通过减少MM′X合金中某一元素的含量来引入原子空位, 或者通过热处理过程产生热空位, 从而导致马氏体相变温度的显著下降 [5][6][7] . Liu等人 [2,8] 正是在对此问题的研究中, 通过Mn 含量的调控, 发现了"居里温度窗口"现象.…”

Section: 度以使磁相变和结构相变耦合起来是Mm′x材料研究的重要内容之一unclassified

Effect of doping with rare-earth element La in MnCoGe system

Zhang

Shi

Hidayah

et al. 2021

Sci. Sin.-Phys. Mech. Astron.

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“…Therefore, there is considerable research interest in the emerging attractive topic of magnetic refrigeration (MR) [1,2]. Advances in magnetocaloric materials (MCMs) are urgently needed to realize the promise of MR. MCMs which exhibit a giant magnetocaloric effect (MCE) include Gd 5 (Si x Ge 1−x ) 4 [3,4], MnFe(P,As) [5], Mn(Fe,Co)Ge [6], LaFe 13−x Si x [7,8], and Heusler alloys [9], which undergo a first-order magnetic transition (FOMT) near their Curie temperatures (T C s). Recently, other materials, such as RE 2 ZnMnO 6 (RE = Gd, Dy, and Ho) perovskites [10], RE 2 FeAlO 6 (RE = Gd, Dy, Ho) oxides [11], RE 60 Co 20 Ni 20 (RE = Ho and Er) amorphous ribbons [12], LaFe 12 B 6 -based materials [13], and rare earth-based intermetallic compounds [14], were found to exhibit outstanding magnetocaloric performance at cryogenic temperatures.…”

Section: Introductionmentioning

confidence: 99%

One-Step Sintering Process for the Production of Magnetocaloric La(Fe,Si)13-Based Composites

Zhong

Dong

Huang

et al. 2022

Metals

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A one-step sintering process was developed to produce magnetocaloric La(Fe,Si)13/Ce-Co composites. The effects of Ce2Co7 content and sintering time on the relevant phase transformations were determined. Following sintering at 1373 K/30 MPa for 1–6 h, the NaZn13-type (La,Ce)(Fe,Co,Si)13 phase formed, the mass fraction of α-Fe phase reduced and the CeFe7-type (La,Ce)(Fe,Co,Si)7 phase appeared. The mass fraction of the (La,Ce)(Fe,Co,Si)7 phase increased, and the α-Fe phase content decreased with increasing Ce2Co7 content. However, the mass fraction of the (La,Ce)(Fe,Co,Si)7 phase reduced with increasing sintering time. The EDS results showed a difference in concentration between Co and Ce at the interphase boundary between the 1:13 phase and the 1:7 phase, indicating that the diffusion mode of Ce is reaction diffusion, while that of Co is the usual vacancy mechanism. Interestingly, almost 100 % single phase (La,Ce)(Fe,Co,Si)13 was obtained by appropriate Ce2Co7 addition. After 6 h sintering at 1373 K, the Ce and Co content in the (La,Ce)(Fe,Co,Si)13 phase increased for larger Ce2Co7 content. Therefore, the Curie temperature increased from 212 K (binder-free sample) to 331 K (15 wt.% Ce2Co7 sample). The maximum magnetic entropy change (−∆SM)max decreased from 8.8 (binder-free sample) to 6.0 J/kg∙K (15 wt.% Ce2Co7 sample) under 5 T field. High values of compressive strength (σbc)max of up to 450 MPa and high thermal conductivity (λ) of up to 7.5 W/m∙K were obtained. A feasible route to produce high quality La(Fe,Si)13 based magnetocaloric composites with large MCE, good mechanical properties, attractive thermal conductivity and tunable TC by a one-step sintering process has been demonstrated.

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An efficient scheme to tailor the magnetostructural transitions by staged quenching and cyclical ageing in hexagonal martensitic alloys

Cited by 38 publications

References 63 publications

Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

Effect of doping with rare-earth element La in MnCoGe system

One-Step Sintering Process for the Production of Magnetocaloric La(Fe,Si)13-Based Composites

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