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Effects of Al2O3 platelet and VC additive on sintering and mechanical properties of WC-based composites by hot pressing
Ist Teil von
Advances in applied ceramics, 2021-01, Vol.120 (1), p.17-23
Ort / Verlag
London, England: Taylor & Francis
Erscheinungsjahr
2021
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Fully dense WC-Al
2
O
3
platelet composites with VC additive were fabricated by hot-press sintering. Their mechanical properties and microstructure were examined. The contents of Al
2
O
3
platelet (Al
2
O
3pl
) and VC were optimised. The fracture toughness of WC-based composites would be obviously improved with Al
2
O
3pl
addition. The defined addition of VC was beneficial for the densification and improved mechanical properties of the WC-based composites. The microstructure of the composites was fine, compact and homogeneous compared with the composites without VC addition. The range of fracture toughness of WC-Al
2
O
3pl
composites was 9.3-13.5 MPa m
1/2
. The flexural strength of the composites varied a little and the maximum was 1289 MPa when the content of Al
2
O
3pl
was 5 vol.-%, the content of VC was 0.5wt-%.