Tribological Performances of Modified Babbitt Alloy Under Different Sliding Modes

2021 ◽  
Vol 143 (6) ◽  
Author(s):  
Yuquan Ni ◽  
Hui Zhang ◽  
Guangneng Dong
Keyword(s):  
Wear Resistance ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Equivalent Stress ◽  
Sliding Modes ◽  
High Microhardness ◽  
Improve Wear Resistance ◽  
Better Than ◽  
Babbitt Alloy

Abstract This paper aims to improve wear resistance of bare Babbitt modified by CuLa and evaluates the effect of different sliding modes on tribological properties of bare Babbitt, Babbitt modified by 0.5 wt% CuLa (marked by mbabbitt-1), and Babbitt modified by 1 wt% CuLa (marked by mbabbitt-2). First, bare Babbitt was modified with different contents of CuLa. The microstructure, microhardness, and wettability of Babbitt were tested and studied. Then, the tribological properties of bare Babbitt, mBabbitt-1, and mBabbitt-2 were conducted by the reciprocating mode and unidirectional mode under the lubricated condition. The results showed that the SnSb grain of the modified Babbitt was refined and uniformly distributed. The microhardness of mBabbitt-1 was higher than that of bare Babbitt and mBabbitt-2. Compared with bare Babbitt, the wettability of mBabbitt-1 and mBabbitt-2 was improved. Anti-friction and wear resistance of specimens under the reciprocating mode were better than that of specimens under the unidirectional mode, which was attributed to low strain and equivalent stress of bare Babbitt under the reciprocating mode. Moreover, anti-wear of bare Babbitt was improved by adding CuLa due to refined grain and high microhardness.

Tribological properties of the epoxy resin-based solid lubricant coating modified by Kevlar fibers

2018 ◽  
Vol 70 (9) ◽  
pp. 1706-1713 ◽  
Author(s):  
Guotao Zhang ◽  
Yanguo Yin ◽  
Ting Xie ◽  
Dan Li ◽  
Ming Xu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Epoxy Resin ◽  
Tribological Properties ◽  
Dry Friction ◽  
Friction And Wear ◽  
Solid Lubricant ◽  
Transfer Film ◽  
Wear Properties ◽  
Content Type ◽  
Friction And Wear Properties

Purpose This paper aims to obtain high mechanical and good tribological properties of epoxy resin-based coatings under dry friction conditions. Design/methodology/approach Bonded solid lubricant coatings containing Kevlar fibres were prepared by a spraying method. The friction and wear properties of the coatings were experimentally investigated with a face-to-face tribometre under dry friction conditions. Scanning electron microscopy, energy dispersive X-ray spectroscopy and 3D laser scanning technologies were used to characterise the tribological properties. The action mechanism of the Kevlar fibres on a solid lubricant transfer film was also analysed. Findings Adding Kevlar fibres can significantly improve the wear resistance of the coatings. When the Kevlar fibre content increases, the tribological properties of the coatings improve and then worsen. Superior properties are obtained with 0.03 g of Kevlar fibres. Appropriately increasing the load or speed is beneficial to the removal of the outer epoxy resin and the formation of a lubricant film. During friction, the solid lubricants wrapped in the epoxy resin accumulate on the surface to form a transfer film that shows a good self-lubricating performance. In the later friction stage, fatigue cracks occur on the solid lubricant film but cannot connect to one another because of the high wear resistance and the entanglement of the rod-like Kevlar fibres. Thus, no large-area film falls from the matrix, thereby ensuring the long-term functioning of solid lubricant coatings. Originality/value Epoxy resin-based solid lubricant coatings modified by Kevlar fibres were prepared, and their friction and wear properties were investigated. Their tribological mechanisms were also proposed. This work provided a basis for the analysis of the tribological properties and design of bonded solid lubricant coatings containing Kevlar fibres.

scholarly journals Effect of temperature and mating pair on tribological properties of DLC and GLC coatings under high pressure lubricated by MoDTC and ZDDP

Friction ◽  
2020 ◽  
Author(s):  
Kang Liu ◽  
Jia-jie Kang ◽  
Guang-an Zhang ◽  
Zhi-bin Lu ◽  
Wen Yue
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Effect Of Temperature ◽  
Wear Properties ◽  
Dlc Coatings ◽  
Base Oil ◽  
Two Temperatures ◽  
Friction And Wear Properties ◽  
Lubrication Conditions ◽  
Better Than

AbstractDiamond-like carbon (DLC) and graphite-like carbon (GLC) coatings have good prospects for improving the surface properties of engine parts. However, further understanding is needed on the effect of working conditions on tribological behaviors. In this study, GLC and two types of DLC coatings were deposited on GCr15 substrate for investigation. The friction and wear properties of self-mated and steel-mated pairs were evaluated. Two temperatures (25 and 90 °C), three lubrication conditions (base oil, molybdenum dithiocarbamate (MoDTC)-containing oil, MoDTC+zinc dialkyldithiophosphate (ZDDP)-containing oil), and high Hertz contact stress (2.41 GPa) were applied in the experiments. The results showed that high temperature promoted the effect of ZDDP on steel-mated pairs, but increased wear under base oil lubrication. The increased wear for steel-mated pairs lubricated by MoDTC-containing oil was due to abrasive wear probably caused by MoO3 and β-FeMoO4. It was also found that in most cases, the tribological properties of self-mated pairs were better than those of steel-mated pairs.

scholarly journals PHYSICAL AND MECHANICAL PROPERTIES OF MULTI-ELEMENT COATINGS

2021 ◽  
Vol 7 (2(38)) ◽  
pp. 31-32
Author(s):  
G. A. Zharmagambetova ◽  
I. A. Kudusova ◽  
V. Ch. Laurinas
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction And Wear ◽  
Physical And Mechanical Properties ◽  
Magnetron Deposition ◽  
Nickel Chromium ◽  
High Microhardness

A number of experiments were conducted to measure the physical and mechanical properties of multielement coatings. To apply CrNiTiFeCu coatings on a nickel-chromium substrate, the technology of magnetron deposition in an atmosphere of argon or nitrogen was used. The results of measurements of the microhardness as well as the coefficients of friction and wear resistance of the applied CrNiTiFeCu thin films are presented. The findings indicate that the studied samples show a high microhardness and wear resistance. Consequently, there is a possibility to extend the lifespan of mechanisms and machines parts.

Renovate Tribological Properties of Nanostructured Alumina Templates by Diverse Electrolytes

2020 ◽  
Vol 12 (6) ◽  
pp. 806-809
Author(s):  
Ghanshyam Dass ◽  
Anil Kumar ◽  
Manoj Kumar Kushwaha
Keyword(s):  
Wear Resistance ◽  
Pore Structure ◽  
Tribological Properties ◽  
Energy Dispersive Spectroscopy ◽  
Friction And Wear ◽  
Applied Load ◽  
Energy Dispersive ◽  
Pore Density ◽  
Wear Properties ◽  
Friction And Wear Properties

Friction and wear properties of NAAO templates were calculated in affinity to pore dimensions and applied load. Homogeneously uniformly decorative synthesized by anodization of nanoporous aluminium oxide films having 65–95 μm thick and pores of 143.5, 105, 84.4 nm diameter. A tribological competency of the material checked out with loads and 250 rpm on the pin on a dry wear disc. The anodized NAAO sample has wear resistance increased by 25% as compared to the non-anodized sample. The pore density little bit impressed the frictional characters of NAAO template. We counsel that these course templates basically contribute to the reduction of friction distrait the pore structure by proving energy-dispersive spectroscopy (EDS).

Influences of Nano-Silica on Friction and Noise Properties of Urea Grease

2010 ◽  
Vol 450 ◽  
pp. 189-193 ◽  
Author(s):  
Ji Hui Yin ◽  
Jian Jun Qu ◽  
Bao Yu Song ◽  
Dai Zhong Su
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Tribological Properties ◽  
Noise Level ◽  
Friction And Wear ◽  
Nano Silica ◽  
High Frequencies ◽  
Noise Characteristics ◽  
Bearing Vibration ◽  
Vibration Tester

Tribological properties of the urea grease containing nano-silica were investigated with a four-ball tester, and its noise characteristics were evaluated with a BVT-1 bearing vibration tester. The results showed that the nano-silica has good effects on friction and wear resistances, the urea grease with 3% nano-silica has the least value of friction coefficient, and the urea grease with 2% nano-silica showed the best wear resistance. A proper amount of nano-silica can decrease the noise of the urea grease, and when lubricated by the grease with 1% nano-silica, the bearing achieved its lowest noise level as well as the best velocity values of both intermediate and high frequencies.

Research on Friction Property of the Ni/ZrO2 Composite Infiltrated Layer on Cast Steel Surface under High Temperature

2014 ◽  
Vol 687-691 ◽  
pp. 4299-4302
Author(s):  
Xian Ming Sun ◽  
Gui Rong Yang ◽  
Lei Wei ◽  
Yu Lan Liu
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Friction And Wear ◽  
Steel Surface ◽  
Cast Steel ◽  
Composite Layer ◽  
Friction Property ◽  
Surface Composite Layer ◽  
Change Trend ◽  
Better Than

The surface composite layer Ni/ZrO2 on the ZG45 cast steel surface was fabricated through vacuum infiltration casting method. This paper researched on the Ni/ZrO2 composite infiltrated layer morphology, hardness and the friction property under fry friction. The results show that the added of the ZrO2 ceramic particles increase the composite infiltrated layer hardness and the wear resistance. The 15% ZrO2 composite infiltrated layer wear resistance is better than the 10% ZrO2 composite infiltrated layer. Different ZrO2 contents have same change trend. The friction coefficient decreases with the temperature increasing. The 10% ZrO2 friction coefficient changes obviously with the temperature increasing. The 15% ZrO2 friction coefficient changes evener than the 10% ZrO2 but the protection of friction and wear is more obvious.

scholarly journals Microstructure and Tribological Properties of Fe-Based Laser Cladding Layer on Nodular Cast Iron for Surface Remanufacturing

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 974
Author(s):  
Dongya Zhang ◽  
Zhongwei Li ◽  
Hongwei Fan ◽  
Hongbin Rui ◽  
Feng Gao
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Tribological Properties ◽  
Dry Friction ◽  
Equivalent Stress ◽  
Nodular Cast Iron ◽  
Friction Coefficients ◽  
Cladding Layer ◽  
Starved Lubrication ◽  
Lubrication Conditions

In this study, a cladding layer and nitriding layer were prepared on nodular cast iron, to provide guidance for remanufacturing of nodular cast iron. Their microstructure and composition and the tribological properties under dry and starved lubrication conditions were studied. Meanwhile, the contact stresses at different friction stages were simulated through the finite element method. The micro-hardness of the cladding layer and nitriding layer were 694 HV0.5 and 724.5 HV0.5, which were 4 times and 4.2 times higher than that of the substrate. For dry friction conditions, the wear resistance of the cladding layer and nitriding layer were 113.2 times and 65.5 times that of the substrate. For starved lubrication conditions, the friction coefficients of the cladding layer and nitriding layer were lower than that of the substrate. In addition, their average friction coefficients and wear resistance were gradually reduced with the increase in load. Contact simulation showed that the maximum equivalent stress gradually increased with the friction coefficient during the dry friction, and the peak value of von Mises stress on the nitriding layer was larger than that of the cladding layer, and the nitriding layer was more likely to yield and peel off.

scholarly journals Research of Microstructure, Friction and Wear on Siliconized Aluminum-Bronze With Different Silicon Powder Ratio

2021 ◽  
Vol 7 ◽  
Author(s):  
Feng Tian ◽  
Chunyan Wu ◽  
Bin Zhu ◽  
Liang Wang ◽  
Yong Liu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Friction And Wear ◽  
Surface Hardness ◽  
Silicon Powder ◽  
Aluminum Bronze ◽  
Bronze Alloy ◽  
Si Content ◽  
Powder Content ◽  
Improve Wear Resistance

In order to enhance the wear resistance without changing the mechanical properties of the substrate, the aluminum-bronze alloy was siliconized by pack cementation in this paper. Its surface hardness was improved by a certain thickness of siliconized layer. The different processes and their influences on the siliconized layer and the substrate were investigated by changing the ratio of siliconizing powder. The microstructure and phase composition of the siliconized layer was detected and analyzed. Compared with the non-siliconized sample, the hardness of the siliconized layer of 30% Si content is increased by 93.54%, and the average friction coefficient is reduced to 40.38%. The maximum thickness of siliconized layer in the experiment is 200 μm when the silicon powder content is 30%. It can be concluded that surface siliconizing is effective to reduce the friction coefficient of aluminum-bronze and improve wear resistance.

Tribological properties of hydrogenated boron carbide (BxC:Hy) thin films on stainless steel deposited by RF-PECVD technique

2020 ◽  
Vol 91 (2) ◽  
pp. 21301
Author(s):  
Arundhati Bute ◽  
Neelima Khare ◽  
Sanjiv Kumar ◽  
Debarati Bhattacharya ◽  
Kulwant Singh ◽  
...  
Keyword(s):  
Thin Films ◽  
Wear Resistance ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
High Hardness ◽  
Self Bias ◽  
Deposition Parameters ◽  
Frequency Plasma

This study narrates the findings regarding investigation of tribological properties of BxC:Hy thin films deposited by Radio Frequency Plasma Enhanced Chemical Vapour Deposition (RF-PECVD) technique. To study tribological properties, two sets of films were prepared with variation in composition and thickness by tuning deposition parameters. Tribological properties were studied in ambience for three different applied vertical load values (5, 10 and 15 N). Lower self-bias (−75 V) seems advantageous for synthesis of BxC:Hy films offering superior hardness, lubricity and wear resistance in tribologically stressed conditions. For a given composition, the film with the highest thickness (∼3 μm) exhibited better friction and wear resistance, offering lowest co-efficient of friction (COF) ∼0.23 for 5 N load and specific wear rate of 2.56 × 10−5 mm3/Nm for 10 N load. Lower self-bias during deposition (−75 V) seems advantageous for synthesis of BxC:Hy films having high hardness (∼2800 HK) and excellent Co-efficient of friction (COF).

scholarly journals The Effective Role Played by Graphene Fillers for Improving the Tribological Properties of Ceramics

2015 ◽  
Author(s):  
M. Belmonte ◽  
J. Llorente ◽  
M. I. Osendi ◽  
P. Miranzo
Keyword(s):  
Wear Resistance ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Ceramic Materials ◽  
Proof Of Concept ◽  
New Materials ◽  
Sliding Motion ◽  
Effective Role ◽  
Contact Pressures

Nowadays, new materials with enhanced tribological properties are required to fulfil the new demanding working conditions of more efficient and eco-friendly industrial processes. To achieve this goal, we propose the addition of graphene nanofillers, a very attractive self-lubricating solid, to ceramic materials for improving their tribological responses. As proof of concept, here we present the role of the graphene nanoplatelets (GNPs) on the friction and wear resistance of two different graphene/ceramic nanocomposites, in particular, GNPs/silicon nitride and GNPs/silicon carbide materials. The tribological tests evidence that GNPs are ideal nanofillers to increase the wear resistance, especially under high contact pressures, because the nanoplatelets are exfoliated during the sliding motion and lead to the formation of a carbon-based protecting film; whereas the benefits on the friction depend on the tribo-testing conditions.

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