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首页> 外文会议>3rd international conference on magnetic refrigeration at room temperature >MAGNETOCALORIC EFFECT AND PROPERTIES OF LA(FE_(11.1)CO_(0.8)SI_(1.1))B_(0.25) ALLOY MANUFACTURED IN BATCHES
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MAGNETOCALORIC EFFECT AND PROPERTIES OF LA(FE_(11.1)CO_(0.8)SI_(1.1))B_(0.25) ALLOY MANUFACTURED IN BATCHES

机译：分批生产的LA（FE_（11.1）CO_（0.8）SI_（1.1））B_（0.25）合金的磁热效应和性能

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摘要

Every 10 kg of La(Fe_(11.1)Co_(0.8)Si_(1.1))B_(0.25) alloys were melted by intermediate frequency furnace (2500 Hz). One batch of the melted alloys was casted into ingots with thickness of 10 mm in copper mold. Another batch of the melted alloys was strip-casted into thin strips by a water-cooling copper roller. The samples prepared were annealed at 1070 ℃ for 150 h and 30 h respectively. Results indicate that different annealing time does not have much influence on magnetocaloric effect of La(Fe_(11.1)Co_(0.8)Si_(1.1))B_(0.25) alloys. SEM and EPMA analysis shows that the samples are composed of 1:13 main phase, La-rich phase and Fe-rich phase. The La-rich phase contains lanthanum (La), iron (Fe), cobalt (Co) and silicon (Si). The Fe-rich phase mainly contains Fe and small amount of Co. All boron (B) elements are in Fe-rich phase. The isothermal entropy change △S_m and the adiabatic temperature change △T_(ad) of the mold-casting samples of La(Fe_(11.1)Co_(0.8)Si_(1.1))B_(0.25) alloy are larger than those of the strip-casting samples of La(Fe_(11.1)Co_(0.8)Si_(1.1))B_(0.25) alloy.
机译：每10千克La（Fe_（11.1）Co_（0.8）Si_（1.1））B_（0.25）合金通过中频炉（2500 Hz）熔化。一批熔化的合金在铜模中铸成厚度为10毫米的铸锭。用水冷铜辊将另一批熔融合金带铸成细条。制备的样品分别在1070℃退火150 h和30 h。结果表明，不同的退火时间对La（Fe_（11.1）Co_（0.8）Si_（1.1））B_（0.25）合金的磁热效应影响不大。 SEM和EPMA分析表明样品由1:13主相，富La相和富Fe相组成。富镧相包含镧（La），铁（Fe），钴（Co）和硅（Si）。富铁相主要包含铁和少量的钴。所有硼（B）元素均处于富铁相。 La（Fe_（11.1）Co_（0.8）Si_（1.1））B_（0.25）合金压铸样品的等温熵变△S_m和绝热温度变化△T_（ad）大于带钢La（Fe_（11.1）Co_（0.8）Si_（1.1））B_（0.25）合金的铸造样品。

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