Powder Metallurgy of Metals and Composites

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Powder Metallurgy".

Deadline for manuscript submissions: closed (25 August 2025) | Viewed by 417

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Interests: mechanical alloying; microstructural refining; high-energy ball milling; microstructure-property relationship
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Special Issue Information

Dear Colleagues,

Powder metallurgy (PM) encompasses a series of processes used to reduce the need for subtractive processes in manufacturing, lowering material losses and reducing the cost of the final product. PM is revolutionizing materials engineering, offering innovative solutions for the production of novel alloys and composites. Its ability to control microstructures and improve mechanical properties has attracted worldwide attention in the development of high-performance materials in strategic fields such as the aerospace, automotive, and biomedical industries. Trough PM can create engineering materials with unique properties that are difficult or impossible to attain through traditional methods. The scopes of the PM are enhanced by mechanical alloying and high-energy ball milling, enabling the generation of refined microstructures and improving the mechanical properties and functionality of final products. The integration of composite materials into PM enhances material capabilities, allowing for lightweight-strength components with tailored properties. Innovative sintering methods, such as spark plasma, microwave, induction heating, and additive manufacturing-assisted techniques, are improving the boundaries of densification levels and particle bonding, demonstrating significant advancements in achieving microstructural homogeneity and improving mechanical performance, establishing them as essential tools for advanced material design.

This Special Issue invites contributions focusing on the latest developments in PM, including review papers, alloy and composite preparations, microstructure–property relationships, and sintering methods. We aim to foster collaboration among researchers and industry professionals to explore new frontiers in PM technology for material preparation. Your insights and innovations will contribute to advancing this dynamic field and unlocking its potential for future technologies. Join us in consolidating the future of materials science.

Dr. Ivanovich Estrada-Guel
Guest Editor

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Keywords

  • powder metallurgy
  • alloys
  • composites
  • microstructure
  • structure
  • mechanical properties
  • sintering
  • mechanical alloying
  • high-energy ball milling

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Published Papers (1 paper)

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Research

14 pages, 7282 KB  
Article
Effects of Sintering Pressure and Co Content on the Microstructure and Mechanical Performance of WC–Co Cemented Carbides
by Jinhu Ju, Dan Huang, Haitao Xu, Duo Dong, Jiangpeng Lou, Yuan Xu, Jiao Shi and Liu Zhu
Metals 2025, 15(9), 930; https://doi.org/10.3390/met15090930 - 22 Aug 2025
Viewed by 159
Abstract
The fabrication of WC-based cemented carbides faced challenges including inhomogeneous composition and grain coarsening. To solve these problems, WC–Co cemented carbides were fabricated via spark plasma sintering (SPS) using core–shell WC–Co powders prepared by an electroless plating method. The effects of sintering pressure [...] Read more.
The fabrication of WC-based cemented carbides faced challenges including inhomogeneous composition and grain coarsening. To solve these problems, WC–Co cemented carbides were fabricated via spark plasma sintering (SPS) using core–shell WC–Co powders prepared by an electroless plating method. The effects of sintering pressure and Co content on the microstructure and mechanical properties of the cemented carbides were investigated. The results showed that, with increasing sintering pressure, the relative density of the sintered samples was improved (98.4–99.6%) while the grains were coarsened (0.94–1.07 μm). The optimal properties (fracture toughness 11.11 MPa·m1/2, and hardness 2100.3 HV30) were obtained when sintered with a pressure of 20 MPa. Grain coarsening at higher pressure (30 MPa) reduced the toughness of the cemented carbides. When the Co content was increased from 3 wt.% to 8 wt.%, fracture toughness was improved while the hardness of the cemented carbides was reduced, attributed to the intrinsic high toughness and low hardness of the Co phase. The WC–8 wt.% Co cemented carbides exhibited optimized synergic mechanical performance (hardness of 1874.2 HV30 and fracture toughness of 13.77 MPa·m1/2). This work elucidated the relationship between the key sintering parameters (pressure and Co content) and the microstructure and mechanical properties of the cemented carbides. The achievements obtained provide a theoretical foundation for high-quality fabrication of the WC–Co cemented carbides. Full article
(This article belongs to the Special Issue Powder Metallurgy of Metals and Composites)
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