A new type of double-layer gradient cemented carbides: Preparation and microstructure characterization. (October 2016)

• Record Type: Journal Article
• Authors: Zhang, Weibin; Du, Yong; Zhou, Peng; Peng, Yingbiao; Li, Na; Xie, Wen
• Is Part Of: Scripta materialia. Volume 123(2016)
• Page Start: 73
• Page End: 76
• Publication Date: 2016-10
• Subjects: Cermets -- Functionally graded materials (FGM) -- Thermodynamics -- Electron probe microanalysis (EPMA) -- Liquid-phase sintering; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.05.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Based on thermodynamic calculations and a concept of miscibility gap, a new type of double-layer gradient WC–Co–Ti(C, N)–ZrC cemented carbides is prepared through liquid-phase sintering under vacuum at 1465 °C for 1 h. The core of the prepared cemented carbides consists of WC, (Co) binder phase and miscibility gap (Ti-rich and Zr-rich cubic phases), in addition to the surface layer (WC and Co-rich binder phase) and second layer (WC, binder phase and Ti-rich cubic phase). The prerequisite and mechanism for the formation of double layers have been clarified by means of microstructure characterization and thermodynamic calculations. Graphical abstract: