压力对热压法制备LaFe_(11.6)Si_(1.4)H_(1.02)-In复合材料组织与性能的影响（英文）  

Indium-Bonded LaFe_(11.6)Si_(1.4)H_(1.02) Magnetocaloric Composites by Hot Pressing

作　　者：庞文凯 陈云贵[1] 唐永柏[1] 周龄童 郭华强 Pang Wenkai Chen Yungui Tang Yongbai Zhou Lingtong Guo Huaqiang(Sichuan University, Chengdu 610065, China)

机构地区：[1]四川大学,四川成都610065

出　　处：《稀有金属材料与工程》2017年第9期2384-2388,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51176050)

摘　　要：主动式磁蓄冷器中的制冷材料需要满足优良的机械性能、磁热性能和导热性能。然而,目前大多数磁制冷材料在成形和导热性能方面存在着一些问题。在本研究中,介绍了一种在430 K的温度下,将LaFe_(11.6)Si_(1.4)H_(1.02)和铟粉混合后在不同压力下进行压制成形的方法。结果显示,当压制压力超过200 MPa时,复合磁工质的磁热性能将会大幅度降低。在压制压力为100 MPa时,厚度为0.8 mm的片状磁工质在0~2 T的磁场下,达到的最大绝热温变为5.88 K。The advanced magnetocaloric composites in active magnetic regenerator（AMR） are required to meet the good mechanical properties,magnetocaloric effect（MCE） and thermal conductivity. However there are challenges in the shape up and heat conduction of most of the magnetocaloric composites currently. In this paper,we reported LaFe_（11.6）Si_（1.4）H_（1.02） magnetocaloric composites which was pressed together with a low melting point metal of indium（In） and the different compaction pressures of 0~800 MPa at 430 K. The results show that the MCE of the composite is deteriorated when compaction pressure exceeds 200 MPa. The In-bonded LaFe_（11.6）Si_（1.4）H_（1.02） composite sheet with a thickness of 0.8 mm pressed with 100 MPa has the maximum adiabatic temperature change of 5.88 K at the magnetic field change of 0~2 T.

关 键 词：磁热效应 热压工艺 LaFe11.6Si1.4H1.02复合材料 

分 类 号：TB33[一般工业技术—材料科学与工程]