13系合金;磁熱效應(yīng);顆粒尺寸"/>

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加工對(duì)吸氫La0.6Pr0.4Fe11.4Si1.6B0.2合金磁熱穩(wěn)定性的影響研究
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中國北方稀土(集團(tuán))高科技股份有限公司生產(chǎn)部 內(nèi)蒙古 包頭 包頭稀土研究院 包頭,包頭稀土研究院,北京科技大學(xué)新金屬材料國家重點(diǎn)實(shí)驗(yàn)室 北京

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中圖分類號(hào):

TB64

基金項(xiàng)目:

國家高技術(shù)研究發(fā)展計(jì)劃(863)(項(xiàng)目號(hào)2011AA03A404)、內(nèi)蒙古包鋼稀土(集團(tuán))高科技股份有限公司博士后工作站項(xiàng)目資助(項(xiàng)目號(hào)201H1721)和內(nèi)蒙古自然科學(xué)基金資助(項(xiàng)目號(hào)2013MS0802)


Processing effect on the hydrogenation of La0.6Pr0.4Fe11.4Si1.6B0.2 magnetocaloric alloy
Author:
Affiliation:

China Northern Steel Rare-earth Group Hi-tech Co,Ltd Baotou,,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

Fund Project:

SB RAS Project (III.23.2.1); Fundamental Research Project of Byelorussian AS and Fundamental Research Program OEMMPU RAS “Multiscale Investigation of Properties and Behavior of Advanced Materials”

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    摘要:

    采用工業(yè)原料和感應(yīng)熔煉法制備出La0.6Pr0.4Fe11.4Si1.6B0.2板錠，通過高溫短時(shí)退火獲得NaZn13型主相合金，進(jìn)行氫化處理并研究了合金顆粒尺寸對(duì)吸氫處理后La0.6Pr0.4Fe11.4Si1.6B0.2氫化物磁熱性能的影響。外形尺寸3-5 cm的大尺寸樣品在吸氫后出現(xiàn)嚴(yán)重粉化，呈層片狀剝離的破碎狀態(tài)，但心部仍保持完整塊狀。外形尺寸小于1 cm的小尺寸樣品吸氫后形狀保持完好。La0.6Pr0.4Fe11.4Si1.6B0.2合金存在吸氫粉化臨界尺寸。采用外形尺寸小于1 cm的樣品吸氫能夠防止合金氫化粉化現(xiàn)象發(fā)生，有利于鑄造樣品直接吸氫獲得一定尺寸和幾何形狀的塊狀La0.6Pr0.4Fe11.4Si1.6B0.2Hx樣品。

    Abstract:

    Thick plate of La0.6Pr0.4Fe11.4Si1.6B0.2 alloy was produced with industrial raw materials by induction melting method and NaZn13 type magnetocaloric phase was obtained by annealing at high temperature for short time. The annealed alloy was hydrogenated with various shapes and sizes. The bulk sample with a size of 3-5 cm was broken to powders from the outside to inside like an onion with a smooth ball shape center part left during the hydrogenation process, while the small samples with sizes less than 1 cm still hold their original shapes. The critical crack size for the La0.6Pr0.4Fe11.4Si1.6B0.2 alloy was 1 cm on hydrogenation to avoid breaking down to powders. The processing could be used to develop La0.6Pr0.4Fe11.4Si1.6B0.2Hx alloys with a certain sizes and shapes directly from casting alloy by hydrogenation absorption.

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張濤,劉翠蘭,張勇.加工對(duì)吸氫La0.6Pr0.4Fe11.4Si1.6B0.2合金磁熱穩(wěn)定性的影響研究[J].稀有金屬材料與工程,2017,46(6):1684~1688.[Zhang Tao, Liu Cuilan, Zhang Yong. Processing effect on the hydrogenation of La0.6Pr0.4Fe11.4Si1.6B0.2 magnetocaloric alloy[J]. Rare Metal Materials and Engineering,2017,46(6):1684~1688.]
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  • 收稿日期:2015-01-23
  • 最后修改日期:2015-03-05
  • 錄用日期:2015-05-13
  • 在線發(fā)布日期: 2017-11-07
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