Properties and pulsed current activated consolidation of nanostructured MgSiO3-MgAl2O4 composites

Title
Properties and pulsed current activated consolidation of nanostructured MgSiO3-MgAl2O4 composites
Authors
손인진두송이도정만윤진국
Keywords
Sintering; NgAl2O4-MgSiO3; Composite; Nanostructured material; Powder metallurgy
Issue Date
2013-09
Publisher
Metals and Materials International
Citation
VOL 19, NO 5, 1041-1045
Abstract
Nanocrystalline materials have received much attention as advanced engineering materials with improved physical and mechanical properties. As nanomaterials possess high strength, high hardness, excellent ductility and toughness, undoubtedly, more attention has been paid for the application of nanomaterials. Nanopowders of MgO, Al2O3 and SiO2 were made by high energy ball milling. The simultaneous synthesis and consolidation of nanostuctured MgAl2O4-MgSiO3 composites from milled 2MgO, Al2O3 and SiO2 powders was investigated by the pulsed current activated sintering process. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition of grain growth. Highly dense nanostructured MgAl2O4-MgSiO3 composites were produced with a simultaneous application of 80 MPa pressure and a pulsed current of 2000A within 1min. The fracture toughness of MgAl2O4-Mg2SiO4 composites sintered from 60 mol%MgO-20 mol%Al2O3-20mol%SiO2 powders milled for 4 h was 3.2MPa·m1/2. The fracture toughness of MgAl2O4-MgSiO3 composite is higher than that of monolithic MgAl2O4.
URI
http://pubs.kist.re.kr/handle/201004/46007
ISSN
15989623
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE