13HY系合金是一種極具發(fā)展?jié)摿Φ氖覝卮胖评洳牧?但該材料易粉化,如何成型并保持大磁熱效應(yīng)成為了亟需解決的問(wèn)題。本文采用中頻感應(yīng)爐熔煉La0.8Ce0.2Fe11.51Mn0.19Si1.3母合金并退火,之后制備成粉末。合金粉末在650 ℃, 850 ℃和1050 ℃不同溫度下熱壓成型,將熱壓塊體合金加工成薄片后進(jìn)行飽和氫化。利用X射線衍射儀、掃描電子顯微鏡、VersLab對(duì)樣品的相組成、微觀結(jié)構(gòu)、磁熱性能進(jìn)行了研究。在1050 ℃下熱壓樣品的孔隙率最低,最大體積磁熵變最高,達(dá)到了144.7 mJ/cm3?K。1050 ℃熱壓樣品氫化后居里溫度提高至室溫附近,仍保持了一級(jí)磁相變的大磁熱效應(yīng),且沒(méi)有裂痕產(chǎn)生,保持了完整性。"/>

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高溫?zé)釅悍ㄖ苽銵a(Fe, Si)13Hy系磁制冷材料的磁熱性能研究
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作者單位:

1.西安理工大學(xué);2.包頭稀土研究院

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基金項(xiàng)目:

國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)52066001), 內(nèi)蒙自然科學(xué)基金資助(項(xiàng)目號(hào)2021MS05016), 北方稀土項(xiàng)目資助(項(xiàng)目號(hào)BFXT-2021-D-0013)


Research on the Magnetocaloric Effect of La(Fe, Si)13HyMagnetic Refrigeration Material Prepared by Hot-pressed Method at High Temperature
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1.Xi’an University of Technology,Xi’an;2.Baotou Research Institute of Rear earths

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    摘要:

    La(Fe, Si)13HY系合金是一種極具發(fā)展?jié)摿Φ氖覝卮胖评洳牧?但該材料易粉化,如何成型并保持大磁熱效應(yīng)成為了亟需解決的問(wèn)題。本文采用中頻感應(yīng)爐熔煉La0.8Ce0.2Fe11.51Mn0.19Si1.3母合金并退火,之后制備成粉末。合金粉末在650 ℃, 850 ℃和1050 ℃不同溫度下熱壓成型,將熱壓塊體合金加工成薄片后進(jìn)行飽和氫化。利用X射線衍射儀、掃描電子顯微鏡、VersLab對(duì)樣品的相組成、微觀結(jié)構(gòu)、磁熱性能進(jìn)行了研究。在1050 ℃下熱壓樣品的孔隙率最低,最大體積磁熵變最高,達(dá)到了144.7 mJ/cm3?K。1050 ℃熱壓樣品氫化后居里溫度提高至室溫附近,仍保持了一級(jí)磁相變的大磁熱效應(yīng),且沒(méi)有裂痕產(chǎn)生,保持了完整性。

    Abstract:

    La(Fe, Si)13HY based alloy is regarded as the candidate of the room temperature magnetic refrigeration materials. However as the poor mechanical property of the hydride which is difficult to be used in the magnetic refrigerator. How to prepare the magnetic refrigrant with large magnetocaloric effect is the key problem to be solved. In this paper La0.8Ce0.2Fe11.51Mn0.19Si1.3master alloy was prepared by medium frequency induction furnace and annealed, followed by milling to powder. The alloy podwer was hot pressed at 650 ℃, 850 ℃ and 1050 ℃ respectively. The resulted La0.8Ce0.2Fe11.51Mn0.19Si1.3alloy was cut into plates and then hydrogenated until saturated. The phase constitution, microstructure and magnetocaloric effect of samples was determined by XRD, SEM and VersLab. The porosity is the lowest and the volumetric magnetic entropy change is the alrgest (144.7 mJ/cm3?K) for the sample hot pressed at 1050 ℃. The Curie temperature increase to near room temperature, the large magnetocaloric effect of the first order phase transition is still maintained for the sample hot pressed at 1050 ℃ after hydrogenation. No cracks on the surface are found on the hydride and keep integrity.

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程娟,黃焦宏,游才印,李波,劉翠蘭,郭亞茹.高溫?zé)釅悍ㄖ苽銵a(Fe, Si)13Hy系磁制冷材料的磁熱性能研究[J].稀有金屬材料與工程,2023,52(1):318~322.[CHENG Juan, HUANG Jiaohong, YOU Caiyin, LI Bo, LIU Cuilan, GUO Yaru. Research on the Magnetocaloric Effect of La(Fe, Si)13HyMagnetic Refrigeration Material Prepared by Hot-pressed Method at High Temperature[J]. Rare Metal Materials and Engineering,2023,52(1):318~322.]
DOI：10.12442/j. issn.1002-185X.20211098

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歷史
  • 收稿日期:2021-12-10
  • 最后修改日期:2022-01-24
  • 錄用日期:2022-02-09
  • 在線發(fā)布日期: 2023-02-13
  • 出版日期: 2023-02-08