Advances in Hardmetals and Cermets

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (20 June 2024) | Viewed by 4369

Special Issue Editors


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Guest Editor
Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany
Interests: hardmetals; cemented carbides; cermets; thermal analysis; gas analysis
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Guest Editor
Department of Materials Engineering (MTM), KU Leuven, B-3001 Leuven, Belgium
Interests: development of hardmetals and cermets; powder based additive manufacture of hardmetals and cermets; processing and characterization of ceramics and ceramic composites; combination of thermodynamic simulation and materials development

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Guest Editor
Materials and Processes Department, Industry & Mobility Unit, TECNALIA Research & Innovation, 20009 San Sebastián, Spain
Interests: hard materials; cermets; hardmetals; additive manufacturing; sinter based additive manufacturing; non-conventional sintering processes

Special Issue Information

Dear Colleagues,

Tools made from hard metals, cemented carbides, and/or cermets are essential for the industrial fabrication of many products in life science, automotive, oil and gas, and other areas of manufacturing. With increasing changes in production and the need to machine and shape new materials, new challenges for tool materials are also arising. To address many of them, new frontiers (such as the additive manufacturing of hardmetals and cermets), alternative cobalt- and nickel-free binders, as well as novel WC-free hard phases have to be crossed. Thus, we welcome you to publish your contributions of novel developments in hard metals and cermets within this Special Issue.

Dr. Johannes Pötschke
Dr. Shuigen Huang
Dr. Inigo Agote
Guest Editors

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Keywords

  • 3D printing
  • additive manufacturing
  • hardmetals
  • cermets
  • cemented carbides
  • alternative binders
  • high entropy alloys
  • high entropy carbides

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Published Papers (2 papers)

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Research

12 pages, 9549 KiB  
Article
Effects of Sinter-HIP Temperature on Microstructure and Properties of WC–12Co Produced Using Binder Jetting
by Ivan Goncharov, Marco Mariani, Gian Pietro De Gaudenzi, Anatoliy Popovich, Nora Lecis and Maurizio Vedani
Metals 2024, 14(1), 132; https://doi.org/10.3390/met14010132 - 22 Jan 2024
Viewed by 1607
Abstract
This study investigates the influence of different sinter-HIP temperatures and binder saturation levels on the microstructure and properties of WC–12Co cemented carbide, produced using binder jetting. The sinter-HIP process was performed at 1400 °C, 1460 °C, and 1500 °C and binder saturation levels [...] Read more.
This study investigates the influence of different sinter-HIP temperatures and binder saturation levels on the microstructure and properties of WC–12Co cemented carbide, produced using binder jetting. The sinter-HIP process was performed at 1400 °C, 1460 °C, and 1500 °C and binder saturation levels of 60% and 75% were selected during printing. The binder saturation proved to affect the repeatability of the manufacturing process and the sturdiness of the green models. The increase of the sintering temperature from 1400 °C to 1460 °C is correlated with an increase in the density. Nonetheless, a further raise in temperature to 1500 °C leads to significant grain coarsening without clear advantages in terms of porosity reduction. Both the transverse rupture strength and Vickers hardness increase when the sinter-HIP temperature rises from 1400 °C to 1460 °C, where the typical results for traditionally manufactured WC–12Co are met, with a comparable grain size. The transverse rupture strength and Vickers hardness then decrease for samples treated at 1500 °C. Finally, potential issues in the manufacturing process are identified and correlated with the defects in the final components. Full article
(This article belongs to the Special Issue Advances in Hardmetals and Cermets)
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15 pages, 5710 KiB  
Article
TiCN Cermets with MnFeCoNiCu High Entropy Alloy Binder
by Johannes Pötschke, Mathias von Spalden and Anne Vornberger
Metals 2023, 13(7), 1259; https://doi.org/10.3390/met13071259 - 12 Jul 2023
Cited by 2 | Viewed by 1866
Abstract
Cermets are composites of a TiCN hard phase and a metal binder, typically a mixture of Co and Ni. They offer excellent combinations of hardness and fracture toughness as well as bending strength. Due to the current classification of both Co and Ni [...] Read more.
Cermets are composites of a TiCN hard phase and a metal binder, typically a mixture of Co and Ni. They offer excellent combinations of hardness and fracture toughness as well as bending strength. Due to the current classification of both Co and Ni as CRM as well as CMR there is interest that their use shall be limited and their amount within cermets reduced. Within this study, a novel high entropy alloy-based metal binder system, comprising only elements that are not strong oxide or carbide formers is investigated with regard to their mechanical and microstructural properties they offer in TiCN-based cermets. Within the investigated equimolar MnFeCoNiCu composition, small Cu precipitations are found after sintering. Due to this, the Cu content was systematically reduced, and the maximal solubility estimated at which still a full solid solution occurs. With an optimized Cu content, dense cermets with a single FCC binder phase and with hardness values of up to 1213 HV30 and fracture toughness values of 14.8 MPa·m1/2 could be achieved. Full article
(This article belongs to the Special Issue Advances in Hardmetals and Cermets)
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