In:
Journal of the American Ceramic Society, Wiley, Vol. 99, No. 4 ( 2016-04), p. 1147-1150
Abstract:
MoB and SiC particulate reinforced MoSi 2 matrix composites were synthesized in situ from Mo, Si, and B 4 C powder mixtures by self‐propagating high‐temperature synthesis ( SHS ). The SHS MoSi 2 –MoB–SiC products were vacuum hot‐pressed ( HP ed) at 1400°C for 90 min to fabricate high‐density ( 〉 97.5% relative density) bulk composites. Microstructure refinement and improvements in the Vickers hardness and fracture toughness of the HP ed composites were observed with increasing B 4 C content in the reaction mixture. The HP ed composite of composition MoSi 2 –0.4MoB–0.1SiC exhibited grain size of 1–5 μm, Vickers hardness of 12.5 GP a, bending strength of 537 MP a, and fracture toughness of 3.8 MP a.m 1/2 . These excellent mechanical properties indicate that MoB and SiC particulate reinforced MoSi 2 composites could be promising candidates for structural applications.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2016.99.issue-4
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
Permalink