Effect of Al 2 O 3 ceramic binder on mechanical and microstructure properties of spark plasma sintered WC-Co cermets

Fazili, Ali; Nikzad, Leila; Rahimipour, Mohammad Reza; Razavi, Mansour; Salahi, E.

doi:10.1016/j.ijrmhm.2017.08.010

Cited by 23 publications

(15 citation statements)

References 20 publications

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“…Therefore, besides the mixed carbon content and carbide grain size, the design of chemical composition is also a logical strategy to enhance the sinterability of tungsten carbide in conventional methods. The low melting point of the metal and possibility of carbonation and oxidation make the selection of the transition-metal carbides (TiC [ 68 , 69 ], TaC [ 70 ], and SiC [ 71 , 72 ]) and metal oxides (Al 2 O 3 [ 73 ], ZrO 2 [ 74 ], Y 2 O 3 [ 75 , 76 ], and La 2 O 3 [ 77 ]) binders more favorable for tailoring the densification process of BTC.…”

Section: Densification Of Binderless Tungsten Carbidementioning

confidence: 99%

A Review on Binderless Tungsten Carbide: Development and Application

et al. 2019

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HIGHLIGHTS• Establish processing-composition-microstructure-property relationships governing binderless tungsten carbide (BTC).• Highlight the densification improving strategies and toughening methods for BTC.• Provide key challenges as well as the outlook for superior peformance associated with BTC.ABSTRACT WC-Co alloys have enjoyed great practical significance owing to their excellent properties during the past decades. Despite the advantages, however, recently there have been concerns about the challenges associated with the use of Co, i.e. price instability, toxicity and properties degeneration, which necessitates the fabrication of binderless tungsten carbide (BTC). On the other hand, BTC or BTC composites, none of them, to date has been commercialized and produced on an industrial scale, but only used to a limited extent for specialized applications, such as mechanical seals undergoing high burthen as well as high temperature electrical contacts. There are two challenges in developing BTC: fully densifying the sintered body together with achieving a high toughness. Thus, this review applies towards comprehensively summarize the current knowledge of sintering behavior, microstructure, and mechanical properties of BTC, highlighting the densification improving strategies as well as toughening methods, so as to provide reference for those who would like to enhance the performance of BTC with better reliability advancing them to further wide applications and prepare the material in a way that is environment friendly, harmless to human health and low in production cost. This paper shows that the fabrication of highly dense and high-performance BTC is economically and technically feasible. The properties of BTC can be tailored by judiciously selecting the chemical composition coupled with taking into careful account the effects of processing techniques and parameters.

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Section: Densification Of Binderless Tungsten Carbidementioning

confidence: 99%

A Review on Binderless Tungsten Carbide: Development and Application

et al. 2019

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“…The most commonly used molds/punches are considered to be of graphite for most of the composites and generally graphite sheets are used as a shroud between the sample and the mold-die punch to prevent the sticking of the sample and mold/punch for further use. 11,[68][69][70][71][72][73][74][78][79][80][81][82][83][84][85][86][87][88] The SPS process is entirely divided into four main stages which are (a) removal of gases from the chamber and generation of vacuum, (b) the two intermediate stages involves the simultaneous application of resistance heating and applied pressure, (c) cooling of sintered samples. 75 The existence of spark plasma and the occurrence of discharge have been a controversial issue and highly debatable in SPS sintering process.…”

Section: Sinteringmentioning

confidence: 99%

“…Fazili et al 72 in 2017 successfully sintered Co-Al 2 O 3 -WC based cemented carbides using SPS. In this study, there was a partial replacement of Co binder by Al 2 O 3 to study its effects on the microstructures as well as mechanical properties of the composite.…”

Section: Review Of Properties Of Tungsten Carbide Composites Fabricat...mentioning

confidence: 99%

“…Fazili et al 72 used high energy ball milling to mill WC, Co, and Al 2 O 3 powders using Al 2 O 3 balls in ethanol slurry. Milling was done in polyethylene bottle for 1 h using ball to powder ratio as 10:1 at about 150 rpm.…”

Section: Review Of Literaturesmentioning

confidence: 99%

Section: Review Of Literaturesmentioning

confidence: 99%

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A review of fabrication and properties of spark plasma sintered tungsten carbide based advanced composites

Dar

Sheikh

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The high-performance tool materials have been inevitably used for most of the cutting tool applications where high reliability and difficult to cut materials are of major demand. The cemented carbides and its composites offer an excellent combination of the properties where it can be used for tool materials due to its high wear resistance, high hardness at elevated temperatures, and considerable fracture toughness. However to obtain optimum values of mechanical properties and uniformly distributed ultrafine grains, a number of new fabrication techniques, alteration in the content of cemented carbide composition, and variation in the parameters of fabrication process have been employed. This review paper will come in handy for researchers and scientists working on advanced cemented carbides and spark plasma sintering as it overviews the recent work done on tungsten carbide composites using the novel spark plasma sintering technique considering different process parameters in order to achieve ultrafine microstructures of sintered specimens, enhanced mechanical properties of composites in addition to energy as well as time saving considerations. The thorough review of various research papers revealed that the parameters of the sintering (sintering temperature, applied pressure, surrounding environment), additives in sintering (both content and composition), reinforcement of cemented carbide with other materials, nano-filler/whisker addition, partial or complete removal of metallic phase from the cemented carbide affect the properties of sintered specimens and their calculated as well as optimum setting can provide an excellent combination of properties desired in cutting tool operations.

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Tungsten Carbides

Shabalin

2022

Ultra-High Temperature Materials IV

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Effect of Al 2 O 3 ceramic binder on mechanical and microstructure properties of spark plasma sintered WC-Co cermets

Cited by 23 publications

References 20 publications

A Review on Binderless Tungsten Carbide: Development and Application

A Review on Binderless Tungsten Carbide: Development and Application

A review of fabrication and properties of spark plasma sintered tungsten carbide based advanced composites

Tungsten Carbides

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