Synthesis of bulk nanocrystalline samarium hexaboride

被引：35

作者：

Agaogullari, Duygu ^{[1
]}

Balci, Ozge ^{[1
]}

Ovecoglu, M. Lutfi ^{[1
]}

Suryanarayana, C. ^{[2
]}

Duman, Ismail ^{[1
]}

机构：

[1] Istanbul Tech Univ, Fac Chem & Met Engn, Dept Met & Mat Engn, PML, TR-34469 Istanbul, Turkey

[2] Univ Cent Florida, Dept Mech & Aerosp Engn, Orlando, FL 32816 USA

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 15期

关键词：

Samarium hexaboride; Mechanochemical synthesis; Cold pressing/pressureless sintering; Microstructural properties; Mechanical properties; RARE-EARTH; LAB6; POWDERS; CRYSTALS; BORIDES; SMB6; CEB6;

D O I：

10.1016/j.jeurceramsoc.2015.07.037

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study reports on the preparation and consolidation of nano-sized SmB6 powders via mechanochemical synthesis (MCS) performed at room-temperature using Sm2O3-B2O3-Mg powder blends followed by cold pressing/pressureless sintering. Milling duration was used as an MCS parameter to reveal the optimum production conditions of nanoscale SmB6 powders, which were subsequently subjected to HCl leaching to remove the intermediate products. Microstructural, physical and magnetic properties of the SmB6 powders were evaluated using X-ray diffractometer (XRD), differential scanning calorimeter (DSC), particle size analyzer (PSA), stereomicroscope (SM), scanning electron microscope (SEM), transmission electron microscope/energy dispersive spectrometer (TEM/EDS), atomic absorption spectrometer (AAS), surface area analyzer (SAA) and vibrating sample magnetometer (VSM). The bulk properties of the SmB6 sintered from nanocrystalline SmB6 powders with an average particle size of similar to 80 nm and a minimum purity of 99.99% were described in terms of their microstructure, density, electrical resistivity, surface roughness, friction coefficient, hardness and wear rate. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：4121 / 4136

页数：16

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