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DEC – węgliki wzmocnione diamentem: nowy supertwardy materiał o zwiększonej odporności na zużycie

Tsybulia Iurii, Przygucki Hubert, Kasonde Maweja, Mątewski Damian

Mining – Informatics, Automation and Electrical Engineering

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2020

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R. 58, nr 4

65--70

PL

W pracy przedstawiono zastosowanie metody spiekania impulsowo-plazmowego (PPC) w dziedzinie spiekanych kompozytów diamentowych w warunkach termodynamicznej niestabilności diamentu do wytwarzania narzędzi przeznaczonych do cięcia i urabiania różnych kamieni. Węgliki wzmocnione diamentem (DEC – ang. Diamond Enchanced Carbide), w dalszej części tekstu nazywane skrótowo DEC, jako materiał kompozytowy zawierający 30 obj. cząstek diamentu wytworzono, stosując mieszaninę submikronową WC6Co [ wag.]. Dzięki warunkom spiekania PPC uzyskano spieki o wysokiej gęstości z silnym wiązaniem pomiędzy cząstkami diamentu a osnową węglika spiekanego. Badano wartości energii właściwej skrawania i współczynnika tarcia pozornego frezu DEC w porównaniu z podobnymi narzędziami z PCD i zwykłego węglika wolframu. Wyniki badań materiałów DEC spiekanych przez GeniCore potwierdziły dobre perspektywy rynkowe dla tych materiałów do zastosowań w cięciu i górnictwie.

EN

The paper presents the application of the pulse plasma consolidation (PPC) method in the field of diamond composites sintered under conditions of thermodynamic instability of diamond for the manufacture of tools intended for the cutting of different stones. Diamond enhanced carbides (DEC) are a composite material containing 30 vol of diamond particles and were produced using a mixture of submicron WC6Co (wt ). Due to PPC sintering conditions, dense sinters with a strong bond between the diamond particles and the sintered carbide matrix were obtained. The values of the specific cutting energy and the apparent friction coefficient of DEC cutter were investigated in comparison with the similar devices from PCD and ordinary tungsten carbide. DEC materials sintered in GeniCore confirmed the good market prospects for these materials in both cutting and mining applications.

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DEC – diamond enhanced carbides: a new super-hard material with enhanced wear resistance

Tsybulia Iurii, Przygucki Hubert, Kasonde Maweja, Mątewski Damian

Mining – Informatics, Automation and Electrical Engineering

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2020

|

R. 58, nr 4

59--64

EN

The paper presents the application of the pulse plasma consolidation (PPC) method in the field of diamond composites sintered under conditions of thermodynamic instability of diamond for the manufacture of tools intended for the cutting of different stones. Diamond enhanced carbides (DEC) are a composite material containing 30 vol of diamond particles and were produced using a mixture of submicron WC6Co (wt ). Due to PPC sintering conditions, dense sinters with a strong bond between the diamond particles and the sintered carbide matrix were obtained. The values of the specific cutting energy and the apparent friction coefficient of DEC cutter were investigated in comparison with the similar devices from PCD and ordinary tungsten carbide. DEC materials sintered in GeniCore confirmed the good market prospects for these materials in both cutting and mining applications.

PL

W pracy przedstawiono zastosowanie metody spiekania impulsowo-plazmowego (PPC) w dziedzinie spiekanych kompozytów diamentowych w warunkach termodynamicznej niestabilności diamentu do wytwarzania narzędzi przeznaczonych do cięcia i urabiania różnych kamieni. Węgliki wzmocnione diamentem (DEC – ang. Diamond Enchanced Carbide), w dalszej części tekstu nazywane skrótowo DEC, jako materiał kompozytowy zawierający 30 obj. cząstek diamentu wytworzono, stosując mieszaninę submikronową WC6Co [ wag.]. Dzięki warunkom spiekania PPC uzyskano spieki o wysokiej gęstości z silnym wiązaniem pomiędzy cząstkami diamentu a osnową węglika spiekanego. Badano wartości energii właściwej skrawania i współczynnika tarcia pozornego frezu DEC w porównaniu z podobnymi narzędziami z PCD i zwykłego węglika wolframu. Wyniki badań materiałów DEC spiekanych przez GeniCore potwierdziły dobre perspektywy rynkowe dla tych materiałów do zastosowań w cięciu i górnictwie.

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Fabrication of Al-4.5% Cu alloy with fly ash metal matrix composites and its characterization

Mahendra K. V., Radhakrishna K.

Materials Science Poland

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2007

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Vol. 25, No. 1

57--68

EN

Metal matrix composites (MMCs) are engineered materials, formed by the combination of two or more dissimilar materials (at least one of which is a metal) to obtain enhanced properties. In the present investigation, an Al-4.5% Cu alloy was used as the matrix and fly ash as the filler material. The composite was produced using conventional foundry techniques. The fly ash was added in 5%, 10%, and 15 wt. % to the molten metal. The composite was tested for fluidity, hardness, density, mechanical properties, impact strength, dry sliding wear, slurry erosive wear, and corrosion. Microstructure examination was done using a scanning electron microscope to obtain the distribution of fly ash in the aluminium matrix, The results show an increase in hardness, tensile strength, compression strength, and impact strength with increasing the fly ash content. The density decreases with increasing fly ash content. Resistance to dry wear and slurry erosive wear increases with increasing fly ash content. Corrosion increases with increasing fly ash content.

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Sliding wear, slurry erosive wear and corrosive wear behavior of aluminium/SiC composite

Ramachandra M., Radhakrishna K.

Materials Science Poland

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2006

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Vol. 24, No. 2/1

333--349

EN

In this study, an aluminium based metal matrix was reinforced with silicon carbide (SiC) particulates using a conventional casting technique, Vortex method. Macro and microstructural studies conducted on the samples revealed a near uniform distribution of SiC particulates. Sliding wear, slurry erosive wear and corrosive wear of the as cast metal matrix composite (MMC) were studied and found that sliding wear and slurry erosive wear resistance improved considerably with the addition of SiC. Whereas corrosion resistance has decreased with addition of SiC particles. The microscopic examination of the worn surfaces, wear debris and subsurface shows that the base alloy wears primarily because of micro cutting. But the MMC's wear because of micro cutting, oxidation, plastic deformation and thermal softening. In slurry erosive wear the formation of passive layer has retarded the wear of the material. It is observed that pitting corrosion was the dominant corrosion mechanism. The bulk hardness has increased with the increase in percentage of SiC particulates. There was no much change in the density of MMC's compared to base metal.

5

Dry sliding wear behavior of Al2219/SiCp metal matrix composites

Basavarajappa S., Chandramohan G., Subramanian R., Chandrasekar A.

Materials Science Poland

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2006

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Vol. 24, No. 2/1

357--366

EN

The present study deals with investigations relating to dry sliding wear behaviour of Al 2219 alloy, reinforced with SiC particles of 0-15 weight percent in steps of 5. The unlubricated pin-on disc tests were conducted to examine the wear behavior of the aluminium alloy and its composites. The tests were conducted at varying load from 0 to 60 N and sliding speed of 1.53m/s, 3m/s 4.6m/s and 6.1m/s for a constant sliding distance of 5000 meters. The result showed that wear rates of the composites are lower than that of the matrix alloy and further decreased with the increase in SiCp content. As the load increases further cracking of SiCp particle occurs and a combination of abrasion, delamination and adhesive wear were observed. The samples were examined using scanning electronic microscope after wear testing and analyzed.