Sintering of nanophase WC–15vol.%Co hard metals by rapid sintering process

Kim, Hwan‐Cheol; Oh, Dong-Young; Shon, In-Jin

doi:10.1016/j.ijrmhm.2004.06.006

Cited by 125 publications

(46 citation statements)

References 26 publications

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“…The consolidation of nanostructured WC-Co powder has been studied using a variety of techniques including the standard liquid phase sintering (LPS) [4][5][6][7][8][9], hot isostatic pressing (HIP) [10], unconventional processes such as microwave sintering [11,12] and spark plasma sintering (SPS) [13][14][15][16][17][18], high frequency induction-heated sintering (HFIHS) [19][20][21], rapid omni compaction (ROC) [22], pulse plasma sintering (PPS) [23] and ultrahigh pressure rapid hot consolidation (UPRC) [24]. Due to the high temperature during sintering, grain growth occurs very quickly and it explains that the finest average grain sizes of sintered WC-Co reported in the literature up to date, using nanograined powders, is around 200-300 nm.…”

mentioning

confidence: 99%

Fabrication of full density near-nanostructured cemented carbides by combination of VC/Cr3C2 addition and consolidation by SPS and HIP technologies

Bonache

Salvador

Fernández

et al. 2011

International Journal of Refractory Metals and Hard Materials

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 AbstractThe aim of present work is to study the effect of VC and/or Cr 2 C 3 in densification, microstructural development and mechanical behavior of nanocrystalline WC12wt.%Co powders when they are sintered by spark plasma sintering (SPS) and hot isostatic pressing (HIP). The results were compared to those corresponding to conventional sintering in vacuum. The density, microstructure, X-ray diffraction, hardness and fracture toughness of the sintered materials were evaluated. Materials prepared by SPS exhibits full densification at lower temperature (1100 ºC) and a shorter stay time (5 min), allowing the grain growth control. However, the effect of the inhibitors during SPS process is considerably lower than in conventional sintering.

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mentioning

confidence: 99%

Fabrication of full density near-nanostructured cemented carbides by combination of VC/Cr3C2 addition and consolidation by SPS and HIP technologies

Bonache

Salvador

Fernández

et al. 2011

International Journal of Refractory Metals and Hard Materials

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“…[23][24][25][26] The PCAS apparatus includes a 30 kW power supply which provides a pulsed current through the sample, and 50 kN uniaxial press. The system was first evacuated and a uniaxial pressure of 80 MPa was applied.…”

Section: Methodsmentioning

confidence: 99%

“…In this regard, the pulsed current activated sintering method (PCASM) which can make dense materials within 2 min has been shown to be effective in achieving this goal. [23][24][25][26] In this work, we investigated the synthesis and sintering of …”

Section: Introductionmentioning

confidence: 99%

Rapid Synthesis and Consolidation of Nanostructured Mg2SiO4-MgAl2O4 Composites

et al. 2011

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Nanopowders of MgO, Al 2 O 3 and SiO 2 were made by high energy ball milling. The rapid sintering of nanostructured MgAl 2 O 4 -Mg 2 SiO 4 composites was investigated by the pulsed current activated sintering process. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition of grain growth. Highly dense nanostructured MgAl 2 O 4 -Mg 2 SiO 4 composites were produced with simultaneous application of 80 MPa pressure and pulsed current of 2800 A within 2 min. The sintering behavior, grain size and mechanical properties of MgAl 2 O 4 -Mg 2 SiO 4 composites were investigated.

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“…High-frequency induction heating sintering (HFIHS) is a new rapid sintering method, which was developed recently for the fabrication of ceramics and composites [18][19][20][21][22]. This method enables the combination of short time high-temperature exposure with pressure application.…”

Section: Introductionmentioning

confidence: 99%

“…During HFIHS, a huge induction current is induced in the sample and in the graphite die. As a result, the sample can be sintered uniformly and rapidly from both inside and outside [18][19][20][21][22]. Thus, the HFIHS method is considered suitable for the fabrication of YSZ materials by using nanocrystalline 8 mol.%Y 2 O 3 -ZrO 2 powder.…”

Section: Introductionmentioning

confidence: 99%

Rapid sintering of nanocrystalline 8 mol.%Y2O3-stabilized ZrO2 by high-frequency induction heating method

et al. 2006

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Using a high-frequency induction-heating sintering (HFIHS) method, nanocrystalline 8 mol.%Y2O3-stabilized ZrO2 was obtained from ultra fine powders. The observed advantages of this process include very quick densification to near theoretical density and prohibition of grain growth in nano-structured materials. Nearly fully dense nanocrystalline 8 mol.%Y2O3-stabilized ZrO2, with a relative density of up to 99.8%, could be obtained with simultaneous application of 100 MPa pressure and an induced current within 10 min of sintering time without significant change in grain size. The influences of the sintering temperature and the mechanical pressure on the final density and grain size of the products were investigated. The hardness and fracture toughness of the dense ZrO2 ceramics produced by HFIHS were investigated.

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Sintering of nanophase WC–15vol.%Co hard metals by rapid sintering process

Cited by 125 publications

References 26 publications

Fabrication of full density near-nanostructured cemented carbides by combination of VC/Cr3C2 addition and consolidation by SPS and HIP technologies

Fabrication of full density near-nanostructured cemented carbides by combination of VC/Cr3C2 addition and consolidation by SPS and HIP technologies

Rapid Synthesis and Consolidation of Nanostructured Mg<SUB>2</SUB>SiO<SUB>4</SUB>-MgAl<SUB>2</SUB>O<SUB>4</SUB> Composites

Rapid sintering of nanocrystalline 8 mol.%Y2O3-stabilized ZrO2 by high-frequency induction heating method

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