The effect of Cu addition on wear mechanisms and tribological properties of aluminium matrix composites reinforced with SiC

2019 ◽  
Vol 53 (22) ◽  
pp. 3073-3083
Author(s):  
Beata Leszczyńska-Madej ◽  
Marcin Madej ◽  
Anna Wąsik
Keyword(s):  
Friction Coefficient ◽  
Tribological Properties ◽  
Nitrogen Atmosphere ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Friction Process ◽  
Single Action ◽  
Positive Effect ◽  
Carbide Content

The article discusses the results of research on the effect of 4 wt.% Cu addition on the tribological properties of composites based on aluminium matrix reinforced with SiC particles. The research also included the analysis of the microstructure and the hardness. The composites were made of elementary powders in a rigid die on a single-action compaction press and then sintered under the nitrogen atmosphere. The silicon carbide content was: 2.5; 5; 7.5; 10 and 15 wt.%. The tests of tribological properties were carried out using a block-on-ring T05 tester under the technically dry friction conditions, and the counter-sample was made of 100 Cr6 steel. The research covered the determination of mass losses, coefficients of friction as well as friction coefficient changes as the function of process duration and material. The obtained results proved that the addition of 4 wt.% Cu helps to reduce the friction coefficient and for composites that contain above 7.5 wt.% SiC also improves their wear resistance. It was also demonstrated that both the addition of Cu as well as an increase of SiC content in the composites have a positive effect on friction by reducing the adhesive wear share in the friction process.

Determination of mechanical properties of aluminium matrix composites constituents

2006 ◽  
Vol 437 (2) ◽  
pp. 406-412 ◽  
Author(s):  
J. Rodríguez ◽  
M.A. Garrido-Maneiro ◽  
P. Poza ◽  
M.T. Gómez-del Río
Keyword(s):  
Mechanical Properties ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Aluminium Matrix Composites

scholarly journals Effects of TiO2 Nanoparticle Addition on Microstructure and Selected Properties of Ag–xTiO2 Composites

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4846
Author(s):  
Anna Wąsik ◽  
Beata Leszczyńska-Madej ◽  
Marcin Madej
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Nitrogen Atmosphere ◽  
Contact Boundary ◽  
Powder Metallurgy Method ◽  
Tem Analysis ◽  
Single Action ◽  
Steel Balls ◽  
Positive Effect ◽  
Made In

The paper presents the results of a study of the microstructure and selected properties of silver-based composites reinforced with TiO2 nanoparticles, produced by the powder metallurgy method. Pure silver powders were mixed with TiO2 reinforcement (5 and 10 wt%) and 5 mm steel balls (100Cr6) for 270 min in a Turbula T2F mixer to produce a homogeneous mixture. The composites were made in a rigid die with a single-action compaction press under a pressure of 400 MPa and 500 MPa and then sintered under nitrogen atmosphere at 900 °C. Additionally, to improve the density and mechanical properties of the obtained sinters, double pressing and double sintering operations were conducted. As a result, compacts with a density of 90–94% were obtained. The microstructure of the sintered compacts consists of uniform grains, and the TiO2 reinforcement phase particles are located on the grain boundaries. There were no discontinuities at the Ag–TiO2 contact boundary, which was confirmed by SEM and TEM analysis. The use of a higher pressure had a positive effect on the hardness and flexural strength of the tested materials. It was found that the composites with 5 wt% TiO2 pressed under 500 MPa are characterized by the highest level of mechanical properties. The hardness of these composites is 57 HB, while the flexural strength is 163 MPa.

scholarly journals Investigation of tribological properties of CarbonX coating deposited on 100Cr6 steel

2019 ◽  
Vol 25 (25) ◽  
pp. 52-55
Author(s):  
Martin Vicen ◽  
Jozef Bronček ◽  
František Nový
Keyword(s):  
Mechanical Properties ◽  
Friction Coefficient ◽  
Tribological Properties ◽  
Bearing Steel ◽  
Friction Process ◽  
Dlc Coating

Abstract The article deals with a reduction of friction coefficient of bearing steel 100Cr6. Reduction of friction was achieved by means of a CarbonX DLC coating. The coating exhibited excellent friction and mechanical properties. This coating was applied to samples made of 100Cr6 bearing steel. The friction results of the CarbonX coating were compared to the friction results of the 100Cr6 bearing steel. Reducing the friction of 100Cr6 bearing steel resulted in reduced wear and increase lifetime. The friction process of the samples will take place in an environment without lubrication. The aim of the article is to verify the behaviour of the DLC coating without the presence of lubricant in the friction node. The achieved results are to be interpreted in the conclusion of article.

Preparation and tribological properties of homogeneously dispersed graphene-reinforced aluminium matrix composites

2018 ◽  
Vol 34 (11) ◽  
pp. 1316-1322 ◽  
Author(s):  
Xin Gao ◽  
Hongyan Yue ◽  
Erjun Guo ◽  
Shaolin Zhang ◽  
Bao Wang ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Aluminium Matrix Composites

The effects of β-Si3N4 whiskers and Fe–Cr–C alloy on the tribological properties of bronze matrix composites

2020 ◽  
pp. 135065012092980
Author(s):  
Jiaming Pan ◽  
Jinwei Yin ◽  
Yongfeng Xia ◽  
Dongxu Yao ◽  
Hanqin Liang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Interfacial Bonding ◽  
Matrix Composites ◽  
Friction Performance ◽  
Coefficient Stability ◽  
Bronze Matrix ◽  
Properties Of Composites

In order to improve the wear resistance, Fe–Cr–C alloy and β-Si3N4 whiskers were chosen as the hard phases in bronze-graphite to prepare self-lubricating composite. Friction behaviors were tested with counter material 45# steel to evaluate the tribological properties of composites. The results indicated that Fe–Cr–C alloy and β-Si3N4 whiskers played different roles in composites. β-Si3N4 whiskers can obviously decrease the wear rate by excellent wear resistance. While the Fe–Cr–C alloy had better wettability with matrix, which improved the interfacial bonding and provided a continuous wear resistance. Moreover, Fe–Cr–C alloy also played a role in maintaining the friction coefficient stability, and this effect was more significant in the conditions of high rotational speeds. The composite containing 12.5 vol.% β-Si3N4 whiskers and 2.5 vol.% Fe–Cr–C alloy in this research showed good friction performance.

scholarly journals Characteristics of the Surface Topography and Tribological Properties of Reinforced Aluminum Matrix Composite

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 358
Author(s):  
Magdalena Niemczewska-Wójcik ◽  
Manickaraj Pethuraj ◽  
Marimuthu Uthayakumar ◽  
Mohd Shukry Abdul Majid
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Surface Topography ◽  
Tribological Properties ◽  
Aluminum Matrix ◽  
Wear Intensity ◽  
Tribological Characteristics ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Tribological Tests

Due to their excellent synergistic properties, Aluminum Matrix Composites (AMC) have achieved a high degree of prominence in different industries. In addition to strength, the wear resistance of materials is also an important criterion for numerous applications. The wear resistance depends on the surface topography as well as the working conditions of the interacting parts. Therefore, extensive experiments are being conducted to improve the suitability of engineering materials (including AMC) for different applications. This paper presents research on manufactured aluminum metal matrix composites reinforced with 10 wt.% of Al2SiO5 (aluminum sillimanite). The manufactured and prepared samples were subjected to surface topography measurements and to tribological studies both with and without lubricant using a block-on-ring tester. Based on the results, analyses of the surface topography (i.e., surface roughness parameters, Abbott–Firestone curve, and surface defects) as well as of the tribological characteristics (i.a. friction coefficient, linear wear, and wear intensity) were performed. Differences in the surface topography of the manufactured elements were shown. The surface topography had a significant impact on tribological characteristics of the sliding joints in the tests where lubrication was and was not used. Better tribological characteristics were obtained for the surfaces characterized by greater roughness (determined on the basis of both the profile and surface texture parameters). In the case of tribological tests with lubrication, the friction coefficient as well as the wear intensity was significantly lower compared to tribological tests without lubrication. However, lower values of the friction coefficient and wear intensity were still recorded for the surfaces that were characterized by greater roughness. The obtained results showed that it is important to analyze the surface topography because surface characteristics influence tribological properties.

scholarly journals Tribological Properties and a Wear Model of Aluminium Matrix Composites - SiC Particles Designed for Metal Forming

2015 ◽  
Vol 60 (1) ◽  
pp. 111-115 ◽  
Author(s):  
J. Wieczorek
Keyword(s):  
Tribological Properties ◽  
Metal Forming ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Wear Model ◽  
Specific Strength ◽  
Reinforcing Particles ◽  
High Specific Strength ◽  
Sic Ceramic ◽  
The Relationship

Abstract Aluminium based metal matrix composites are well known for their good wear resistance, high specific strength, stiffness and hardness. They have been applied in the aerospace, military and, especially, in the automotive industries. This paper presents the results of tests with regard to the application of a mixture of particles in aluminium matrix (AlCu2SiMn) composites where a mixture of SiC ceramic particles was used. The aim of the research was to determine the tribological properties as well as the phenomena and mechanisms which accompany the tribological wear of composites under dry friction conditions. The tribological investigations were conducted on a pin-on-block tester. The results of the tests show the composite obtained can be applied for sliding elements. Based on microscopic examinations and profilometry of the composites AlCu2SiMn+SiC surfaces at interaction the relationship between the size of reinforcing particles and the geometry of the surface layer of the composite was described. The study made it possible to develop a model of tribological wear of composites depending on the size of reinforcing particles.

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