Title

Structure And Properties Of Ultrafine-Grained Mosi2 + Si3N4 Composites Synthesized By Mechanical Alloying

Keywords

Consolidation; Mechanical alloying; Microstructure; MoSi + Si N composites 2 3 4; Transmission electron microscopy; X-ray diffraction

Abstract

Monolithic MoSi2 and MoSi2 + Si3N4 ultrafine-grained composites with 2.5 or 5.0 wt.% Si3N4 were synthesized by mechanical alloying. The microstructure and crystal structure of the phases present in the as-milled powders were determined by electron microscopy and X-ray diffraction methods. The mechanically alloyed powders were successfully consolidated to full density by vacuum hot pressing. A detailed microstructural investigation and mechanical properties (hardness and fracture toughness) evaluation of the consolidated products was presented. After consolidation, the microstructure continued to be fine-grained (in the submicron range), but no appreciable increase in the room temperature fracture toughness of MoSi2 was observed for the composites by the addition of Si3N4. © 2007.

Publication Date

4-25-2008

Publication Title

Materials Science and Engineering A

Volume

479

Issue

1-2

Number of Pages

23-30

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.msea.2007.07.021

Socpus ID

40749105210 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/40749105210

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