Fabrication of gradient cemented carbide with Ni3Al binder: Simulations and experiments. Issue 9 (1st May 2022)

• Record Type: Journal Article
• Authors: Chen, Chong; Dong, Yongzhuang; Hu, Can; Du, Yong; Wei, Shizhong; Long, Jianzhan; Wang, Changji; Xiao, Liqiang; Mao, Feng
• Is Part Of: Ceramics international. Volume 48:Issue 9(2022)
• Page Start: 12756
• Page End: 12763
• Publication Date: 2022-05-01
• Subjects: Gradient cemented carbides -- Ni3Al binder -- Microstructure -- Thermodynamic calculation -- DICTRA simulation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.01.145
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ni3 Al phase with an ordered fcc structure has been extensively investigated as alternative binder in WC/TiC/Ti(C, N)-based cermets. Due to the excellent stability, high temperature performance and oxidation resistance, it shows great potential in γ-free gradient cemented carbides. The possibility to fabricate WC-Ti(C, N)–Ni3 Al gradient cemented carbide using powder metallurgical method was investigated in the present work through both simulations and experiments. The alloys composition and sintering parameters were carefully designed with the guidance of thermodynamic calculations and DICTRA simulations. A gradient layer free of cubic Ti(C, N) phase and enriched in Ni3 Al binder at surface of the cemented carbide sintered at 1723 K for 2 h was generated, with thickness of about 20 μm. The microstructure, elemental concentration distributions and concentration profiles of the new-type gradient cemented carbide with Ni3 Al binder have been analyzed by means of XRD, SEM, EDS and EPMA. The gradient layer formation by DICTRA simulations is in accordance with the experimental data. The present work shows the potential for further design of the gradient cemented carbide with Ni3 Al binder under the powerful guidance of thermodynamic calculations and DICTRA simulations.