A novel technique for production of nano-crystalline mono tungsten carbide single phase via mechanical alloying

Razavi, Mansour; Rahimipour, Mohammad Reza; Yazdani-Rad, R.

doi:10.1016/j.jallcom.2011.03.137

Cited by 25 publications

(5 citation statements)

References 21 publications

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“…But when milling continued due to the existence of hard synthesized carbide which acts as very small ball, crystals became finer. 26 Since heating accelerated production of titanium carbide, crystalline sizes were decreased by increasing temperature in 15 h of milling. In other words, the amount of effective synthesized carbide phase led to decrease in crystalline size with increasing temperature.…”

Section: Resultsmentioning

confidence: 99%

Effect of heating on the properties of nano-crystalline titanium carbide during mechanical alloying process

Razavi

Zamani

Rahimipour

2013

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this research, the effect of heating on the mechanical alloying process for synthesizing of titanium carbide was investigated. Raw materials containing pure titanium and graphite powders were milled in different times and temperature. In order to detect phases and properties of synthesized materials X-ray diffraction was applied. Physical properties including density and specific surface area along with microstructure were studied. Results showed that heating can accelerate the mechanical alloying process. By increasing the temperature during milling, production mechanism of titanium carbide changed from self-propagating high-temperature synthesis to gradual model. Changes of density confirmed this phenomenon too. Increasing the milling time leads to particle size and crystal of synthesized titanium carbides became finer down to nanometer scale. Because of higher effective time span of produced titanium carbide, increasing the temperature produces finer particle sizes of powders in similar milling time.

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Section: Resultsmentioning

confidence: 99%

Effect of heating on the properties of nano-crystalline titanium carbide during mechanical alloying process

Razavi

Zamani

Rahimipour

2013

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…It was observed that a decrease in the particle size and molecular weight of the copolymer effectively absorbs or allows high acidification and increases the segmental motion of ions, respectively. Due to simultaneous synthesis of WC and W 2 C phases in most of the synthesis processes and lower mechanical properties of W 2 C than WC, M.Razavi et al [130] synthesized nano-crystalline WC single phase by means of mechanical alloying. In this process the raw materials containing W and C with WC were milled in a planetary ball mill and the sampling was done in different times.…”

Section: Some Other Nanomaterials and Nano Compositesmentioning

confidence: 99%

Mechanical Milling: a Top Down Approach for the Synthesis of Nanomaterials and Nanocomposites

Yadav¹,

Yadav²,

Singh³

2012

531

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Synthesis of nanomaterials by a simple, low cost and in high yield has been a great challenge since the very early development of nanoscience. Various bottom and top down approaches have been developed so far, for the commercial production of nanomaterials. Among all top down approaches, high energy ball milling, has been widely exploited for the synthesis of various nanomaterials, nanograins, nanoalloy, nanocomposites and nano -quasicrystalline materials. Mechanical alloying techniques have been utilized to produce amorphous and nanocrystalline alloys as well as metal/non-metal nanocomposite materials by milling and post annealing, of elemental or compound powders in an inert atmosphere. Mechanical alloying is a non-equilibrium processing technique in which different elemental powders are milled in an inert atmosphere to create one mixed powder with the same composition as the constituents. In high-energy ball milling, plastic deformation, cold-welding and fracture are predominant factors, in which the deformation leads to a change in particle shape, cold-welding leads to an increase in particle size and fracture leads to decrease in particle size resulting in the formation of fine dispersed alloying particles in the grain-refined soft matrix. By utilizing mechanical milling various kind of aluminium/ nickel/ magnesium/ copper based nanoalloys, wear resistant spray coatings, oxide and carbide strengthened aluminium alloys, and many other nanocomposites have been synthesized in very high yield. The mechanical milling has been utilized for the synthesis of nanomaterials either by milling and post annealing or by mechanical activation and then applying some other process on these activated materials. This review is a systematic view of the basic concept of mechanical milling, historical view and applications of mechanical milling in the synthesis of various nanomaterials, nanosomposites, nnaocarbons and nano quasicrystalline materials.

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“…[10,11] However, W 2 C was considered as metastable phase of tungsten carbide and always synthesizes together with plenty of WC or other tungsten carbides. [12] And WC or W 2 C was prepared by intermittent microwave heating, [13] electron beam induced deposition, [14] eutectic solidification, [15] electro-discharge, [16] chemical synthesis, [17] temperatureprogrammed carburization, [18] dc arc discharge plasma CVD, [19] or carbothermal reduction, [20] etc. However, large scale, nano-sized, ingredient and shape-controllable WC or W 2 C is still hard to prepare.…”

Section: Introductionmentioning

confidence: 99%

Large scale and controllable preparation of W ₂ C nanorods or WC nanodots with peroxidase-like catalytic activity

et al. 2017

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W 2 C nanorods or WC nanodots are prepared via an easy, shape-controllable and large-scale preparation technique. Results reveal that each of the W 2 C nanorods and WC nanodots has a peroxidase-like activity. Besides, the peroxidase-like activity of W 2 C is the first time to be demonstrated. The catalytic efficiency of W 2 C nanorods is much higher than that of WC nanodots and chemical condition range of W 2 C can be wider than that of WC, which indicates that W 2 C is likely to be used as artificial mimetic peroxidase or in-situ amplified colorimetric immunoassay.

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A novel technique for production of nano-crystalline mono tungsten carbide single phase via mechanical alloying

Cited by 25 publications

References 21 publications

Effect of heating on the properties of nano-crystalline titanium carbide during mechanical alloying process

Effect of heating on the properties of nano-crystalline titanium carbide during mechanical alloying process

Mechanical Milling: a Top Down Approach for the Synthesis of Nanomaterials and Nanocomposites

Large scale and controllable preparation of W ₂ C nanorods or WC nanodots with peroxidase-like catalytic activity

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A novel technique for production of nano-crystalline mono tungsten carbide single phase via mechanical alloying

Cited by 25 publications

References 21 publications

Effect of heating on the properties of nano-crystalline titanium carbide during mechanical alloying process

Effect of heating on the properties of nano-crystalline titanium carbide during mechanical alloying process

Mechanical Milling: a Top Down Approach for the Synthesis of Nanomaterials and Nanocomposites

Large scale and controllable preparation of W 2 C nanorods or WC nanodots with peroxidase-like catalytic activity

Contact Info

Product

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Large scale and controllable preparation of W ₂ C nanorods or WC nanodots with peroxidase-like catalytic activity