Evaluation of mechanical properties and processing conditions of WCCo alloys fabricated by magnetic pulsed compaction

Raihanuzzaman, Rumman Md.; Song, Joon-Woo; Hong, Soon‐Jik

doi:10.1016/j.jallcom.2011.12.108

Cited by 17 publications

(4 citation statements)

References 17 publications

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“…Bulk WC samples containing 7.5 and 12 wt.% Co were produced, from mechanically alloyed powders, through magnetic pulsed compaction followed by conventional vacuum sintering [61,62]. The authors reported that the incorporation of magnetic pulsed compaction prior to sintering yielded a much higher hardness with a maximum value of over 1430 HV for the WC-12 wt.% Co sample.…”

Section: Mechanical Properties' Evaluationmentioning

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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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: Mechanical Properties' Evaluationmentioning

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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“…Not only does this affect the final density, but also affects the hardness of these brittle materials. Unlike ductile materials, when MPC is applied on brittle materials with high pressure, initiation of necking behavior between particles do not occur during sintering, which may induce greater amount of pores or defects in the final sintered bodies, eventually leading to low hardness [13,14]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect Of Ti Powder Addition On The Fabrication Of TiO2 Nanopowders

Raihanuzzaman¹,

Park²,

Ghomashchi³

et al. 2015

Archives of Metallurgy and Materials

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Sintered samples of Ti added TiO 2 nanopowders were fabricated by combined application of magnetic pulsed compaction (MPC) and sintering. The effect of Ti nano powder on density, shrinkage and hardness of the samples were investigated as part of the study. The optimum processing conditions were found to be around 0.5 GPa MPC pressure and 1450 • C sintering temperature, illustrating maximum density, hardness and minimum shrinkage. High pressure compaction using MPC was found to enhance density with increasing MPC pressure up to 0.9 GPa, and significantly reduce the total shrinkage (about 16% in this case) in the sintered bulks compared to other general processes (about 18%). While sintered samples blended with micro Ti showed presence of microstructural cracks, the samples with 1-2% nano Ti had less or no cracks on them. Overall, the inclusion of nano Ti indicated improvement in mechanical properties of TiO 2 nanopowders sintered preforms as opposed to micro Ti-added TiO 2 .

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“…While some of the modern techniques use simultaneous compaction and heating as the method for carbide bits production, the conventional route still uses them as separate processes [7]. Although conventional processing takes a longer time, it is still thought of as one of the stable processing routes for the manufacture of carbide products with economic incentives.…”

Section: Introductionmentioning

confidence: 99%

Conventional sintering of WC with nano-sized Co binder: Characterization and mechanical behavior

Raihanuzzaman

Han

Ghomashchi

et al. 2015

International Journal of Refractory Metals and Hard Materials

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Evaluation of mechanical properties and processing conditions of WCCo alloys fabricated by magnetic pulsed compaction

Cited by 17 publications

References 17 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

Effect Of Ti Powder Addition On The Fabrication Of TiO2 Nanopowders

Conventional sintering of WC with nano-sized Co binder: Characterization and mechanical behavior

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