Effects of WC particle size on densification and properties of spark plasma sintered WC–Co cermet

Zhao, Shixian; Song, Xiaoyan; Wei, Chongbin; Zhang, Li; Liu, Xuemei; Zhang, Jiuxing

doi:10.1016/j.ijrmhm.2009.07.017

Cited by 77 publications

(24 citation statements)

References 28 publications

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“…Contemporary cemented carbides based on WC-Co are non-porous and characterized by fine or ultra-fine microstructure, indeed high modulus of rapture can be obtained [34,35]. However, considering preliminary results for relatively large samples of WC-Co cermets having coarse grains and elevated Co content, similar to those reported in this study (1000-1500MPa) were reported [36].…”

Section: Hardness and Modulus Of Rapturesupporting

confidence: 79%

The Cu matrix cermets remarkably strengthened by TiB2 “in situ” synthesized via self-propagating high temperature synthesis

Ziemnicka-Sylwester

2014

Materials & Design

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The TiB 2 -Cu cermets with predominant concentration of superhard TiB 2 (from 45 to 90vol.%) were fabricated using elemental powders by means of SHS (self-propagating hightemperature synthesis) process and simultaneously densified by p-HIP (pseudo-isostatic pressing technique). The heat released during highly exothermic SHS reaction was "in situ" utilized for sintering. The combustion occurred even for 50vol.% Cu dilution. According to XRD metallic copper binder was formed in those cermets in whole range of investigated compositions. The TiB 2 volume fraction significantly influenced the properties of fabricated materials, especially grain size and hardness. Both the average grain size and hardness significantly increased with TiB 2 content, so the maximum value of 18GPa was measured for TiB 2 -5vol.%Cu composite. Coarse grains of 6.4µm in size were observed for this composite while TiB 2-based submicro-composites were formed for 40-50% of Cu where the average grain size did not exceed 0.6µm. The Vickers hardness of 16-18 GPa obtained for cermets containing from 85 to 90vol.% of TiB 2 and no radial cracks in Vickers hardness test proved that in term of hardness and fracture toughness the composites might be competitive to WCCo cermets.

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Section: Hardness and Modulus Of Rapturesupporting

confidence: 79%

The Cu matrix cermets remarkably strengthened by TiB2 “in situ” synthesized via self-propagating high temperature synthesis

Ziemnicka-Sylwester

2014

Materials & Design

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“…In comparison with other reported values for the microhardness and fracture toughness of similar materials (cemented carbides [32,33] …”

Section: Mechanical Propertiesmentioning

confidence: 53%

Spark plasma sintering of TixTa1−xC0.5N0.5-based cermets: Effects of processing conditions on chemistry, microstructure and mechanical properties

Córdoba

Chicardi

Poyato

et al. 2013

Chemical Engineering Journal

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Nanometric powdered Ti x Ta 1-x C 0.5 N 0.5 -based cermets were fabricated using a mechanically induced self-sustaining reaction and consolidated by spark plasma sintering. Highly dense cermets were obtained, and their chemistry, microstructure and mechanical properties were characterised by X-ray diffraction, scanning electron microscopy, image analysis, microindentation and nanoindentation. The microhardness was found to depend directly on the contiguity and size of the ceramic hard particles.The samples synthesised at the lowest temperature (1150 ºC) exhibited more homogeneous microstructures and smaller ceramic particles and the best combination of microhardness and fracture toughness.

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“…Sample 1 is prepared by the sinter-HIP process, and there is rapid grain growth accomplished by coalescence of WC grains [8] during both the heat up and isothermal hold at the liquid phase sintering temperatures [4]. Sample 2 is prepared by the SPS process, which is performed with a reduced sintering temperature and a much shorter holding time, and grain growth is effectively inhibited during the sintering [9]. Therefore, sample 2 has a finer grain structure as compared with sample 1.…”

Section: Resultsmentioning

confidence: 99%

Effect of densification mechanism on the Σ2 grain boundary plane distribution in WC–Co composites

et al. 2013

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Effects of WC particle size on densification and properties of spark plasma sintered WC–Co cermet

Cited by 77 publications

References 28 publications

The Cu matrix cermets remarkably strengthened by TiB2 “in situ” synthesized via self-propagating high temperature synthesis

The Cu matrix cermets remarkably strengthened by TiB2 “in situ” synthesized via self-propagating high temperature synthesis

Spark plasma sintering of TixTa1−xC0.5N0.5-based cermets: Effects of processing conditions on chemistry, microstructure and mechanical properties

Effect of densification mechanism on the Σ2 grain boundary plane distribution in WC–Co composites

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