Densification of ultrafine WC–12Co cermets by Pressure Assisted Fast Electric Sintering

Deorsola, Fabio Alessandro; Vallauri, Dario; Ortigoza-Villalba, G.A.; Benedetti, Bruno

doi:10.1016/j.ijrmhm.2009.10.007

Cited by 38 publications

(16 citation statements)

References 15 publications

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“…Hardness and fracture toughness values were evaluated and it was found that they fall within an acceptable range keeping in mind the easiness of carrying on such quick procedure. In the line of using novel densification techniques, Field Assisted Sintering Techniques (FAST) were used recently by Deorsola et al [40] to consolidate WC-12Co nanopowders. A novel apparatus was developed belonging to the FAST group which is called Pressure Assisted Fast Electric Sintering (PAFES) and was employed to densify the nanopowders.…”

Section: Advanced Consolidation Techniquesmentioning

confidence: 99%

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The Synthesis of Nanostructured WC‐Based Hardmetals Using Mechanical Alloying and Their Direct Consolidation

Al-Aqeeli

Saheb

Laoui

et al. 2014

Journal of Nanomaterials

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Tungsten carbide- (WC-) based hardmetals or cemented carbides represent an important class of materials used in a wide range of industrial applications which primarily include cutting/drilling tools and wear resistant components. The introduction and processing of nanostructured WC-based cemented carbides and their subsequent consolidation to produce dense components have been the subject of several investigations. One of the attractive means of producing this class of materials is by mechanical alloying technique. However, one of the challenging issues in obtaining the right end-product is the possible loss of the nanocrystallite sizes due to the undesirable grain growth during powder sintering step. Many research groups have engaged in multiple projects aiming at exploring the right path of consolidating the nanostructured WC-based powders without substantially loosing the attained nanostructure. The present paper highlights some key issues related to powder synthesis and sintering of WC-based nanostructured materials using mechanical alloying. The path of directly consolidating the powders using nonconventional consolidation techniques will be addressed and some light will be shed on the advantageous use of such techniques. Cobalt-bonded hardmetals will be principally covered in this work along with an additional exposure of the use of other binders in the WC-based hardmetals.

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Section: Advanced Consolidation Techniquesmentioning

confidence: 99%

“…SEM Microstructural observation (a) and EBSD (b) of a fractured surface of the sintered WC-Co alloy (after Liu et al[35]). SEM micrographs of the surface of the densified alloys; (a) constant current and 300 s total time, (b) variable AC current and 180 s total time (after Deorsola et al[40]). …”

mentioning

confidence: 99%

The Synthesis of Nanostructured WC‐Based Hardmetals Using Mechanical Alloying and Their Direct Consolidation

Al-Aqeeli

Saheb

Laoui

et al. 2014

Journal of Nanomaterials

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“…The cemented carbides (WC-Co) with the attractive characteristics of high hardness and good fracture toughness are widely used for a variety of machining, cutting, drilling and other applications [1]. They consist of a high volume of hard tungsten carbide (WC) phase embedded within the soft cobalt (Co) binder phase.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of WC–40vol%Al2O3 composites hot pressed with MgO and CeO2 additives

Qu¹,

Zhu²,

Di³

et al. 2013

Ceramics International

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“…1. Wpływ zawartości kobaltu i wielkość ziarna WC na: a) twardość HV30, b) wytrzymałość na zginanie R g , węglików spiekanych typu WC-Co [3,5,17] Do najważniejszych metod zalicza się konwencjonalne spiekanie w próżni w temperaturze od 1350 do 1650°C w czasie do kilkunastu godzin [1,2,5]. Oprócz spiekania konwencjonalnego w ostatnich latach do wytwarzania kompozytów WC-Co stosuje się m. in.…”

Section: Wprowadzenieunclassified

The research of technological cutting edges with cemented carbides type WC-6Co produces by pulse plasma method

2015

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StreszczeniePrzedstawiono wyniki badań właściwości technologicznych płytek skrawających z węglików spiekanych typu WC-6% wag. Co. Proszki były spiekane metodą spark plasma sintering, za pomocą urządzenia SPS HP D 25, które znajduje się Instytucie Obróbki Plastycznej w Poznaniu. Do wytwarzania płytek skrawających z węglików spiekanych zastosowano mieszaninę proszków z węglika wolframu i kobaltu typu WC-6% wag. Co. Próbki wytwarzano w tej samej temperaturze, lecz w różnym czasie spiekania i z różną prędkością nagrzewania, w próżni 5·10−2 Pa, pod ciśnieniem 60 MPa. Słowa kluczowe: węgliki spiekane, płytki skrawające, metoda impulsowo-plazmowa THE RESEARCH OF TECHNOLOGICAL CUTTING EDGES WITH CEMENTED CARBIDES TYPE WC-6CO PRODUCES BY PULSE PLASMA METHOD AbstractThe paper present the investigation of technological cutting edges with cemented carbides type WC6%Co-wt. Powder was sintering by Spark Plasma Sintering method and device SPS HP D 25. This device is in Metal Forming Institute in Poznan. In researches used powders with microscopic tungsten carbide size 30-50 µm and cobalt size 4-10 µm. Samples sintering at different time and temperatures in vacuum 5·10-2 Pa and pressure 50 MPa.

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Densification of ultrafine WC–12Co cermets by Pressure Assisted Fast Electric Sintering

Cited by 38 publications

References 15 publications

The Synthesis of Nanostructured WC‐Based Hardmetals Using Mechanical Alloying and Their Direct Consolidation

The Synthesis of Nanostructured WC‐Based Hardmetals Using Mechanical Alloying and Their Direct Consolidation

Microstructure and mechanical properties of WC–40vol%Al2O3 composites hot pressed with MgO and CeO2 additives

The research of technological cutting edges with cemented carbides type WC-6Co produces by pulse plasma method

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