In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 602-603 ( 2014-3), p. 586-589
Abstract:
In this study, glassy phase is formed by SiO 2 -K 2 O addition to serve as amorphous grain boundary transition layer. SiC (SiO 2 -K 2 O) / Cu composite material were prepared by two-step coating method and hot pressing sintered below 770°C, 30MPa for 1.5h, using α-SiC as main reinforced phase, SiO 2 -K 2 O as grain boundary and Cu as matrix. The Cu-SiC volume ratio was 75:25. The SiO 2 contents were 5vol.%, 10vol.%, 15vol.%, 20vol.% and 25vol.% of the total volume of the SiC / Cu. XRD and SEM techniques were used to characterize the composite particles and the sintered compacts; Archimedes method, Vickers hardness tester, universal testing machine to test the apparent porosity of the composite materials, the Vickers hardness and the bending strength, respectively. The results showed that with increasing of glassy phase contents, the Vickers hardness and the bending strength first rise and then drop, at the same time, it shows the opposite tendency for the apparent porosity. The sintering samples with the SiO 2 content of 15vol.% have the optimum mechanical properties, the Vickers hardness reached 1.49 GPa, and the bending strength was close to 235 MPa.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.602-603
DOI:
10.4028/www.scientific.net/KEM.602-603.586
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2014
detail.hit.zdb_id:
2073306-9
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