Tribological Behavior and Surface Characteristics of Metal Microtube in Flaring Test

Burnishing is a Severe Plastic Deformation process having the potential to replace expensive finishing post processes. It is considered a super finishing process due to its results in terms of drastic roughness reduction. Also, additional advantages include the surface integrity improvement functionalized to the specific application. Even though burnishing is widely applied for surface improvement of conventional materials, knowledge about its effect on additively manufactured metals is still limited. This paper aims to fill this gap presenting experiments on roller burnishing on additively manufactured stainless steel in order to improve its tribological performance. The experimental campaign was carried out to find suitable process parameters able to drastically improve the tribological behavior of the final product. In particular, the influence of the burnishing forces on the whole surface quality has been addressed. The overall results demonstrate that the selected burnishing configuration is able to successfully modify the surface characteristics of the steel, making it appropriate for critical applications. Furthermore, the experimental findings allow to conclude that burnishing process can replace a series of post processes needed after additive manufacturing, drastically reducing the time and costs associated to the manufacturing process and meeting Industry 4.0 requirements.

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Tribological Behavior and Surface Chemistry Characteristics of Quasicrystal Coatings

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.124-126.1541 ◽

2007 ◽

Vol 124-126 ◽

pp. 1541-1544 ◽

Cited By ~ 1

Author(s):

Bong-Hwan Kim ◽

Sang Mok Lee ◽

Je Sik Shin ◽

B.M. Moon

Keyword(s):

Process Parameters ◽

Tribological Behavior ◽

Surface Characteristics ◽

Air Plasma ◽

Micro Hardness ◽

Air Plasma Spraying ◽

Porosity Level ◽

Surface Method ◽

Plasma Spraying Process ◽

Spraying Process

The aim of this study was to investigate the effects of air plasma spraying process parameters on the tribological behavior and surface characteristics of quasicrystal coatings. For this purpose, the response surface method (RSM), one of the designs of experiment (DOE) was utilized to systematically investigate the combined effects of each process parameters. The RSM analysis revealed that the superior tribological performance of quasicrystal coatings was obtained by the optimized condition of specific micro-hardness and porosity level. It was specially quoted that the relatively low hardness of quasicrystal coatings caused the improvement of abrasive wear resistance during the current investigation.

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Microfrictional Properties of Titanium Carbide

MRS Proceedings ◽

10.1557/proc-782-a8.6 ◽

2003 ◽

Vol 782 ◽

Author(s):

Syed Imad-Uddin Ahmed ◽

Giuseppe Bregliozzi ◽

Henry Haefke

Keyword(s):

Thin Films ◽

Relative Humidity ◽

Titanium Carbide ◽

Microelectromechanical Systems ◽

Tribological Behavior ◽

Surface Characteristics ◽

Operating Conditions ◽

Film Material ◽

Self Assembled Monolayer ◽

Silicon Based

ABSTRACTThe tribological issues associated with silicon-based microelectromechanical systems (MEMS) are well known. A popular solution to improve the tribological behavior is to apply different kinds of thin films. One film material, shown to have favorable properties in specialty applications, and which may also be suited for MEMS, is titanium carbide (TiC).This paper examines the microfrictional properties of titanium carbide surfaces with two surface roughnesses sliding against polished 2 mm diameter TiC counterbodies. A comparison of the microfrictional behavior is made with various other surfaces sliding against the same material. Results indicate that the microfriction of smooth TiC sliding against a smooth TiC surface is low and similar to silicon or TiC sliding against a hydrophobic self-assembled monolayer. However, friction increases when the polished TiC ball slides against a rough TiC surface. Experiments at various relative humidities show that friction increases with increase in the relative humidity for two smooth TiC surfaces sliding against one another, but is reduced at higher relative humidity if the surface of one of the sliding partners is considerably rough.This microfrictional study shows that TiC is well suited for microtribological applications. However, for optimal performance, the surface characteristics need to be tailored to the operating conditions.

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Process Characteristics and Experiment on Micro Arc Oxidation of Light Metals

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.2067 ◽

2013 ◽

Vol 690-693 ◽

pp. 2067-2070

Author(s):

Yi Wang ◽

Hong You Li ◽

Mao Lin Shi

Keyword(s):

Stainless Steels ◽

Ceramic Coating ◽

Tribological Behavior ◽

Influence Factors ◽

Surface Characteristics ◽

Light Metals ◽

X Ray ◽

Process Characteristics ◽

Eds Analysis ◽

Micro Arc Oxidation

Micro arc oxidation (MAO) is a relatively new method of surface treatments which has been used to improve the mechanical and tribological behavior of light metals. Due to the ceramic coating generated by MAO, light metals can be used more widely. The fundamental of MAO and the influence factors of MAO process are discussed here. The surface characteristics of aluminum, titanium, magnesium, Zirconium and stainless steels have been improved by MAO. Scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDS) were used to study the surface morphology and the elemental composition of the MAO coating. The EDS analysis of the coating shows the elements in the electrolyte and oxygen have incorporated into the coating.

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Effect of plasma electrolytic oxidation process on surface characteristics and tribological behavior

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2019.06.104 ◽

2019 ◽

Vol 375 ◽

pp. 824-832 ◽

Cited By ~ 3

Author(s):

Ran Cai ◽

Chen Zhao ◽

Xueyuan Nie

Keyword(s):

Plasma Electrolytic Oxidation ◽

Oxidation Process ◽

Tribological Behavior ◽

Surface Characteristics ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Evaluation of Mechanical and Tribological Behavior, and Surface Characteristics of CMP Pads

MRS Proceedings ◽

10.1557/proc-671-m1.8 ◽

2001 ◽

Vol 671 ◽

Cited By ~ 10

Author(s):

A. K. Sikder ◽

I. M. Irfan ◽

Ashok Kumar ◽

A. Belyaev ◽

S. Ostapenko ◽

...

Keyword(s):

Elastic Properties ◽

State Of The Art ◽

Tribological Behavior ◽

Chemical Mechanical Planarization ◽

Critical Role ◽

Surface Characteristics ◽

Mechanical Analysis ◽

Successful Implementation ◽

Polishing Pads ◽

Non Destructive

ABSTRACTChemical Mechanical Planarization (CMP) occurs at an atomic level at the slurry/wafer interface and hence slurries and polishing pads play a critical role in the successful implementation of this process. Surface roughness, visco-elastic properties, thickness and pore size also play an important role in this process. Unfortunately the mechanical properties of polyurethane polishing pads used in CMP are poorly understood. Here we have studied the mechanical and visco-elastic properties and surface morphology of CMP pads using nano-indentation and dynamic mechanical analysis along with high resolution scanning electron microscopy. A state-of-the-art Universal Micro-Tribometer was used to measure the pad deformation behavior under load. A novel non-destructive scanning ultrasonic transmission technique was also used to characterize inhomogeneity of the visco-elastic properties of full-size CMP pads. Results obtained by different techniques were analyzed to demonstrate methods for quick and reliable evaluation of pad quality for current CMP technology.

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Investigation of surface characteristics and tribological behavior of clutch plate materials

Wear ◽

10.1016/j.wear.2012.10.024 ◽

2013 ◽

Vol 302 (1-2) ◽

pp. 1378-1383 ◽

Cited By ~ 5

Author(s):

Qian Zou ◽

Chethan Rao ◽

Gary Barber ◽

Ben Zhou ◽

Yucong Wang

Keyword(s):

Tribological Behavior ◽

Surface Characteristics

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Medial Smooth Muscle Cell Proliferation in the Balloon Injured Rabbit Aorta: Effect of a Thiazole Compound with Platelet Inhibitory Activity

Thrombosis and Haemostasis ◽

10.1055/s-0038-1661024 ◽

1984 ◽

Vol 51 (01) ◽

pp. 075-078 ◽

Cited By ~ 8

Author(s):

R G Schaub ◽

C A Simmons

Keyword(s):

Smooth Muscle ◽

Platelet Aggregation ◽

Balloon Catheter ◽

Rabbit Aorta ◽

Surface Characteristics ◽

Inhibitory Effect ◽

Lesion Size ◽

Blue Staining ◽

Morphologic Characteristics ◽

Time Period

SummaryTwenty-seven adult male New Zealand rabbits (3–4 kgs) were used in this study. Six rabbits received vehicle, 3 groups of 6 each received doses of 4,5-bis(p-methoxyphenyl)-2-(trifluoromethyl)- thiazole, (U-53,059), at 0.3 mg/kg, 3.0 mg/kg and 30.0 mg/kg/day respectively. Drug and vehicle doses were given orally each day starting 3 days before balloon injury and continuing for the entire 2 week time period. Three rabbits were used as nontreated sham controls. In the vehicle and U-53,059 treated groups aortae were denuded of endothelial cells by balloon catheter injury. Two weeks after injury platelet aggregation to collagen was measured and the aortae removed for analysis of surface characteristics by scanning electron microscopy and lesion size by morphometry. All doses of U-53,059 inhibited platelet aggregation. The 3.0 and 30.0 mg/kg groups had the greatest inhibitory effect. All balloon injured aortae had the same morphologic characteristics. All vessels had similar extent and intensity of Evan’s blue staining, similar areas of leukocyte/platelet adhesion, and a myointimal cell cover of transformed smooth muscle cells. The myointimal proliferative response was not inhibited at any of the drug doses studied.

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Photocatalytic activity of TiO2 synthesized by anodization and anodic spark deposition

MRS Advances ◽

10.1557/adv.2020.405 ◽

2020 ◽

Vol 5 (61) ◽

pp. 3141-3152

Author(s):

Alma C. Chávez-Mejía ◽

Génesis Villegas-Suárez ◽

Paloma I. Zaragoza-Sánchez ◽

Rafael Magaña-López ◽

Julio C. Morales-Mejía ◽

...

Keyword(s):

Electron Microscopy ◽

Photocatalytic Activity ◽

Surface Characteristics ◽

Amorphous Solids ◽

X Ray Diffraction ◽

X Ray ◽

Catalytic Activities ◽

Anodic Spark Oxidation ◽

Porous Surfaces ◽

Scanning Electron

AbstractSeveral photocatalysts, based on titanium dioxide, were synthesized by spark anodization techniques and anodic spark oxidation. Photocatalytic activity was determined by methylene blue oxidation and the catalytic activities of the catalysts were evaluated after 70 hours of reaction. Scanning Electron Microscopy and X Ray Diffraction analysis were used to characterize the catalysts. The photocatalyst prepared with a solution of sulfuric acid and 100 V presented the best performance in terms of oxidation of the dye (62%). The electric potential during the synthesis (10 V, low potential; 100 V, high potential) affected the surface characteristics: under low potential, catalyst presented smooth and homogeneous surfaces with spots (high TiO2 concentration) of amorphous solids; under low potential, catalyst presented porous surfaces with crystalline solids homogeneously distributed.

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