Microstructure, mechanical properties and tribological behavior of Cu-nano TiO2-MWCNTs composite sintered materials

Piasecki, Adam; Paczos, Piotr; Tuliński, Maciej; Kotkowiak, Mateusz; Popławski, Mikołaj; Jakubowicz, Michał; Boncel, Sławomir; Marek, A.; Buchwald, Tomasz; Gapiński, Bartosz; Terzyk, Artur P.; Korczeniewski, Emil; Wieczorowski, Michał

doi:10.1016/j.wear.2023.204834

Cited by 6 publications

(6 citation statements)

References 48 publications

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“…Moreover, nano-TiC x particles play a role as barriers during the dislocation movement process, which enhances the strength of the copper matrix composite. In contrast, the coefficient of thermal expansion mismatch and Taylor strengthening by modulus mismatch between the matrix and particle are also attributed to the strengthening of the composites' wear resistance [28].…”

Section: Resultsmentioning

confidence: 97%

Abrasive Wear and Physical Properties of In-Situ Nano-TiCx Reinforced Cu–Cr–Zr Composites

Zhang

et al. 2023

Coatings

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Cu–Cr–Zr alloys reinforced in situ with TiCx nanoparticles were prepared via combustion synthesis and electromagnetic stirring casting. The microstructure of TiCx/Cu-Cr-Zr composites with various contents was analyzed. The microhardness and Brinell hardness of the composites were determined; the average volumetric abrasive wear rate and worn surface of the composites were investigated; and the electrical, thermal conductivity and thermal expansion coefficients of the materials were discussed. The results indicated that the addition of TiCx particles transformed the Cu–Cr–Zr matrix alloy microstructure from a dendritic to an equiaxed crystal, and the grain size was significantly refined as the amount added was increased. The composites with high TiCx content possessed higher hardness and abrasive wear resistance. The addition of TiCx particles reduced the electrical and thermal conductivity and thermal expansion coefficients of the materials.

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Section: Resultsmentioning

confidence: 97%

Abrasive Wear and Physical Properties of In-Situ Nano-TiCx Reinforced Cu–Cr–Zr Composites

Zhang

et al. 2023

Coatings

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“…The coefficient of friction slightly increased over the course of the test, stabilizing at approximately 0.27. The use of sinters containing modified carbon nanotubes in the copper matrix causes a 4-fold reduction in the value of the coefficient of friction compared to pure copper sinters, for which the COF in the friction pair with the Inconel ® 625 alloy was 1.08 [ 7 ].…”

Section: Resultsmentioning

confidence: 99%

“…Copper, as a matrix, provides high thermal conductivity and facilitates the efficient dissipation of heat from the friction area of the mating parts. Merging copper and CNTs promises a composite with superior performance due to the CNTs’ unique nanoscale properties [ 6 , 7 , 8 , 9 ]. Despite over three decades of research on their synthesis and processing, their potential is still not being fully utilized, which is crucial for the promise to be accomplished.…”

Section: Introductionmentioning

confidence: 99%

“…Powder metallurgy and nanotube modifications allow the control of their distribution within the matrix and interaction with copper. In the works [ 7 , 22 ], carbon nanotubes were modified by decorating them with copper. MWCNTs were coated with copper nanoparticles to increase their weight and prevent them from escaping to the surface during the preparation of powder mixtures and to increase their adhesion to metallic grains.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

Piasecki,

Sobkowiak,

Boroński

et al. 2024

Materials

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This paper presents the results of research on the microstructure, mechanical, and tribological properties of Cu/0.5 wt.% MWCNT (multi-walled carbon nanotube) sintered composite materials produced by powder metallurgy. The purpose of this research was to investigate the impact of carbon nanotube modifications on the uniformity of their dispersion and the effectiveness of their bonding with the matrix. The MWCNTs were modified by chemical oxidation. Additionally, a modification of the ingredient mixing method utilizing ultrasonic frequencies was employed. The tests were carried out using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Vickers hardness tests, static compression tests, and wear tests using the pin-on-disc method. Furthermore, mechanical properties and strain distribution analyses of the micro-specimens were conducted using the Micro-Fatigue System (MFS). The implemented modifications had a positive effect on the dispersion of MWCNTs in the copper matrix and on the mechanical and tribological properties of the sinters.

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“…Mechanical milling combined with thermo-mechanical processing was found to lead to well-densified composites with favorable strength, hardness, and wear resistance properties [3][4][5][6][7][8]. Investigations of the tribological behavior of Al-CNT composites showed that adding CNTs to aluminum enhances the wear resistance of the matrix [9][10][11][12][13][14][15][16][17][18][19][20]. It has been proposed that the crushed CNTs on the worn surface form a carbon film that works as a solid lubricating film.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Wear Behavior of Dual-Matrix Aluminum–(Aluminum–Carbon Nanotube) Composites

Abdeltawab

Esawi

Wifi

2023

Metals

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Aluminum (Al)–aluminum–carbon nanotube (Al–CNT) dual-matrix (DM) composites are a novel class of nanocomposite materials that combine the ductility of the Al matrix with the hardness and wear resistance of the Al–CNT composite and thus can offer a unique combination of properties that make them suitable for a wide range of wear applications such as cutting tools, bearings, brake pads, wear-resistant coatings, etc. However, the specific properties of the DM Al–(Al–CNT) composite will depend on several factors related to the material’s composition and the friction conditions. This study investigates the wear behavior of DM Al–(Al–CNT) composites consisting of a primary matrix of soft aluminum in which milled hard particles of (Al–CNT) are dispersed as affected by five parameters: (1) wt.% CNT in the reinforcement particles, (2) mixing ratio between the reinforcement particles and the soft Al matrix, (3) sliding speed, (4) applied load, and (5) distance. The experimental design used a Taguchi fractional factorial orthogonal array (OA) L27 to reduce the number of experiments, and analysis of variance (ANOVA) was used to determine the significance and to model the effect of each control parameter. Results showed that the wear rate could be reduced by up to 80% by tailoring the composition and controlling the friction conditions. It was found that the mixing ratio significantly impacts the wear behavior of DM Al–(Al–CNT) composites. A mixing ratio of 50% and a CNT content of 3 wt.% at the lowest applied load gave the lowest wear rate and coefficient of friction. Scanning electron microscopy investigations showed fragmentations in the reinforced matrix at higher loads and mixing ratios, which negatively impacted the wear behavior. Our findings confirm that DM Al–(Al–CNT) composites are promising for wear applications. However, the wear behavior depends on the composition and microstructural design of the composite, which needs to be carefully studied and understood.

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Microstructure, mechanical properties and tribological behavior of Cu-nano TiO2-MWCNTs composite sintered materials

Cited by 6 publications

References 48 publications

Abrasive Wear and Physical Properties of In-Situ Nano-TiCx Reinforced Cu–Cr–Zr Composites

Abrasive Wear and Physical Properties of In-Situ Nano-TiCx Reinforced Cu–Cr–Zr Composites

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

Investigation of the Wear Behavior of Dual-Matrix Aluminum–(Aluminum–Carbon Nanotube) Composites

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