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Optimization of Spark Plasma Sintering Parameters for W–B–Co–Ni–Zr–Fe Composites
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Author(s): Kuat Kombayev (D. Serikbayev East Kazakhstan State Technical University, Kazakhstan), Sherzod Kurbanbekov (Khoja Akhmet Yassawi International Kazakh-Turkish University, Kazakhstan), Khrystyna Berladir (Technical University of Košice, Sumy State University, Slovakia), Azamat Urkunbay (D. Serikbayev East Kazakhstan State Technical University, Kazakhstan), Madina Aidarova Aidarova (D. Serikbayev East Kazakhstan State Technical University, Kazakhstan)and Fuad Khoshnaw (School of Engineering, Infrastructure, and Sustainability, De Montfort University, Leicester, UK)
Copyright: 2026
Volume: 15
Issue: 1
Pages: 18
Source title:
International Journal of Manufacturing, Materials, and Mechanical Engineering (IJMMME)
Editor(s)-in-Chief: J. Paulo Davim (University of Aveiro, Portugal)
DOI: 10.4018/IJMMME.408711
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Abstract
This study determined the optimal sintering parameters for tungsten carbide–cobalt cutting inserts produced by spark plasma sintering (SPS) to achieve a balanced combination of structural and mechanical properties for cutting tool applications. Sintering experiments were conducted using a GeniCore U-FAST GC vacuum SPS system. Sintering experiments were conducted using a GeniCore U-FAST GC vacuum SPS unit. A factorial design was applied, varying sintering temperature (1250–1500 °C), applied force (0.4–0.6 kN), dwell time (5–10 min), and pulse current (4000–4800 A). The results indicate that, although all samples exhibited similar phase compositions, pronounced differences in substructural characteristics were observed. Crystallite sizes ranged from 158 to 509 Å, while lattice microstrain varied from 0.17% to 0.645%, correlating with microhardness values between 1875 and 1912 HV. An optimal balance between hardness and plasticity, without evidence of embrittlement, was achieved at a sintering temperature of 1450 °C and a pulse current of 4500 A.
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