Mechanical Synthesis and Rapid Consolidation of Nanostructured W-Al2O3 Composite

BooRak Lee; GeolChae Jeong; GeunO Park; In-Jin Shon

doi:10.3740/MRSK.2018.28.6.343

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2018 Vol.28, Issue 6 Preview Page Next Page

Mechanical Synthesis and Rapid Consolidation of Nanostructured W-Al₂O₃ Composite

June 2018. pp. 343-348

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Abstract

Recently, the properties of nanostructured materials as advanced engineering materials have received great attention. These properties include fracture toughness and a high degree of hardness. To hinder grain growth during sintering, it is necessary to fabricate nanostructured materials. In this respect, a high-frequency induction-heated sintering method has been presented as an effective technique for making nanostructured materials at a lower temperature in a very short heating period. Nanopowders of W and Al₂O₃ are synthesized from WO₃ and Al powders during high-energy ball milling. Highly dense nanostructured W-Al₂O₃ composites are made within three minutes by high-frequency induction-heated sintering method and materials are evaluated in terms of hardness, fracture toughness, and microstructure. The hardness and fracture toughness of the composite are 1364 kg/mm2 and 7.1 MPa·m^1/2, respectively. Fracture toughness of nanostructured W-Al₂O₃ is higher than that of monolithic Al₂O₃. The hardness of this composite is higher than that of monolithic W.

Keywords

nanomaterial

sintering

composite

hardness

fracture toughness

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 28
No :6
Pages :343-348
Received Date : 2018-05-10
Revised Date : 2018-05-28
Accepted Date : 2018-05-28
DOI :https://doi.org/10.3740/MRSK.2018.28.6.343

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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