METAL SURFACE MODIFICATION BY A NANOSECOND DIFFUSE DISCHARGE IN NITROGEN

2015 ◽  
Vol 19 (1) ◽  
pp. 71-75
Author(s):  
M. Erofeev ◽  
M. Shulepov ◽  
Victor Tarasenko
Keyword(s):  
Surface Modification ◽  
Metal Surface ◽  
Diffuse Discharge

scholarly journals Control of Local Hardness Gradient of Metal Surface by Inclined Surface Treatment Using Ultrasonic Nanocrystal Surface Modification

2021 ◽  
Vol 8 (2) ◽  
pp. 533-546
Author(s):  
Yeong-Kwan Jo ◽  
Yeong-Wook Gil ◽  
Do-Sik Shim ◽  
Young-Sik Pyun ◽  
Sang-Hu Park
Keyword(s):  
Surface Modification ◽  
Surface Treatment ◽  
Metal Surface ◽  
Incident Angle ◽  
Surface Hardness ◽  
Parameter Study ◽  
Local Hardness ◽  
Practical Usefulness ◽  
Inclined Surface ◽  
Hardness Gradient

AbstractWe propose an effective method to control the local hardness and morphology of a metal surface by tilting the incident angle of a horn during ultrasonic nanocrystal surface modification (UNSM). In this study, surface treatment using UNSM was performed on an S45C specimen and a parameter study was conducted for optimization. The process parameters were the feeding rate, static load, striking force, and processing angle (Ф). In particular, the Ф was analyzed by tilting the horn by 0°, 10°, 20°, 30°, 40°, and 45° to understand its effect on surface hardness and changes in the morphology. From fundamental experiments, some important phenomena were observed, such as grain-microstructure changes along the processing and thickness directions. Furthermore, to verify the practical usefulness of this study, a flat and a hemispherical specimen of S45C material were treated using UNSM with various values of Ф. A significant change in hardness (an increase from 2–45%) and a gradual hardness gradient on the tested specimens could be easily realized by the proposed method. Therefore, we believe that the method is effective for controlling the mechanical hardness of a metal surface.

A Novel Approach for Metal Surface Modification

2007 ◽  
Vol 280-283 ◽  
pp. 1805-1806
Author(s):  
Zhi Jun Cao ◽  
Jia Chen Liu ◽  
Li Bin Liu ◽  
Hao Ye ◽  
Yan Qiu Wei
Keyword(s):  
Surface Modification ◽  
Wear Rate ◽  
Charge State ◽  
Metal Surface ◽  
Surface Hardness ◽  
Metallic Surface ◽  
New Approach ◽  
Novel Approach ◽  
Complex Shapes ◽  
Enhanced Surface

A new approach was developed for surface modification of metallic surface. By treating nano-zirconia particles and metal surface in different charge state, nano-zirconia particles can be dispersedly inlaid in metal surface owing to electrostatic and nanometer effects. By using this method, metal components of complex shapes, especially those having inside surfaces, might be easily improved, i.e., enhanced surface hardness and wear rate.

A homogeneous focusing system for diode lasers and its applications in metal surface modification

2018 ◽  
Vol 102 ◽  
pp. 197-206 ◽  
Author(s):  
Fei Wang ◽  
Lijing Zhong ◽  
Xiahui Tang ◽  
Chengwen Xu ◽  
Chenhao Wan
Keyword(s):  
Surface Modification ◽  
Metal Surface ◽  
Diode Lasers

scholarly journals Metal Surface Modification with Vibration-Aided Micro-Forging

2012 ◽  
Vol 53 (3) ◽  
pp. 489-494 ◽  
Author(s):  
Yang Bai ◽  
Kenji Nishikawa ◽  
Ming Yang
Keyword(s):  
Surface Modification ◽  
Metal Surface

The Impact of Surface Modification on the Degree of Metal-Composite Adhesion

10.12737/2557 ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 137-143
Author(s):  
Андрей Тулинов ◽  
Andrey Tulinov ◽  
Александр Шубенков ◽  
Aleksandr Shubenkov
Keyword(s):  
Surface Modification ◽  
Empirical Research ◽  
Metal Surface ◽  
Adhesive Strength ◽  
Mixed Method ◽  
Metal Composite ◽  
Phosphate Coating ◽  
Pre Treatment ◽  
The Impact

The article is devoted to the issues of improving metal-composite adhesion by modifying the connecting surfaces with phosphate coating applied to the metal surface prior to introducing the ChesterSuper composite. The authors provide the results of their empirical research to demonstrate that the mixed method improves adhesive strength by 40%. The mixed method proposed by the authors presupposes abrasive pre-treatment and subsequent phosphatizing.

scholarly journals An overview of biofunctionalization of metals in Japan

2009 ◽  
Vol 6 (suppl_3) ◽  
Author(s):  
Takao Hanawa
Keyword(s):  
Surface Modification ◽  
Metal Surface ◽  
Surface Composition ◽  
Polyurethane Composite ◽  
Modification Technique ◽  
Composition Structure ◽  
Poly Ethylene ◽  
Surface Modification Techniques ◽  
The Relationship ◽  
Metal Polymer

Surface modification is an important and predominant technique for obtaining biofunction and biocompatibility in metals for biomedical use. The surface modification technique is a process that changes the surface composition, structure and morphology of a material, leaving the bulk mechanical properties intact. A tremendous number of surface modification techniques using dry and wet processes to improve the hard tissue compatibility of titanium have been developed. Some are now commercially available. Most of these processes have been developed by Japanese institutions since the 1990s. A second approach is the immobilization of biofunctional molecules to the metal surface to control the adsorption of proteins and adhesion of cells, platelets and bacteria. The immobilization of poly(ethylene glycol) to a metal surface with electrodeposition and its effect on biofunction are reviewed. The creation of a metal–polymer composite is another way to obtain metal-based biofunctional materials. The relationship between the shear bonding strength and the chemical structure at the bonding interface of a Ti-segmentated polyurethane composite through a silane coupling agent is explained.

Development Status of Laser Clad Cobalt-Based Alloy Coatings

2013 ◽  
Vol 748 ◽  
pp. 192-195
Author(s):  
Hui Jun Yu
Keyword(s):  
Surface Modification ◽  
Metal Surface ◽  
Laser Cladding ◽  
Influence Factors ◽  
Chemical Properties ◽  
Alloy Coating ◽  
Research Progress ◽  
Development Status ◽  
Existing Problems ◽  
And Chemical Properties

Laser cladding, as an effective method of metal surface modification, is to fuse an alloy coating of enhanced mechanical and chemical properties on the surface of a substrate. Therefore, laser cladding has been attracting continuous and extensive research for years. In this paper, the research progress in laser clad cobalt-based alloys is summarized. The preparing processes, microstructures, properties and influence factors of laser clad cobalt-based alloys coatings and their ceramic particles strengthened composites coatings are analyzed systematically. And the existing problems, some solving measures, the development tendencies and industral uses are presented.

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