Effects of Al2O3 platelet and VC additive on sintering and mechanical properties of WC-based composites by hot pressing. (2nd January 2021)

• Record Type: Journal Article
• Authors: Dong, Weiwei; Zhu, Shigen; Han, Bin; Fan, Bowen; Sun, Ze; Luo, Yilan; Bai, Yunfeng
• Is Part Of: Advances in applied ceramics. Volume 120:Number 1(2021)
• Page Start: 17
• Page End: 23
• Publication Date: 2021-01-02
• Subjects: Al2O3 platelet -- VC -- WC-based composites -- mechanical properties; Ceramics -- Periodicals; 620.1405
• DOI: 10.1080/17436753.2020.1840266
• Languages: English
• ISSNs: 1743-6753

Abstract

ABSTRACT: Fully dense WC-Al2 O3 platelet composites with VC additive were fabricated by hot-press sintering. Their mechanical properties and microstructure were examined. The contents of Al2 O3 platelet (Al2 O3pl ) and VC were optimised. The fracture toughness of WC-based composites would be obviously improved with Al2 O3pl 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-Al2 O3pl 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 Al2 O3pl was 5 vol.-%, the content of VC was 0.5wt-%.