A study on the relationship between the magnetic properties of a worn surface layer and the wear resistance

Wear ◽  
1993 ◽  
Vol 162-164 ◽  
pp. 611-613
Author(s):  
Zhang Baofa ◽  
Liu Yingjie ◽  
Shen Wanci
Keyword(s):  
Wear Resistance ◽  
Magnetic Properties ◽  
Surface Layer ◽  
Worn Surface ◽  
The Relationship

The Wear Behavior of Pulse Current Electroforming Ni-P-SiC Composite Coatings

2007 ◽  
Vol 364-366 ◽  
pp. 358-363 ◽  
Author(s):  
Kung Hsu Hou ◽  
Ming Chang Jeng ◽  
Yung Kang Shen ◽  
Ming Der Ger
Keyword(s):  
Weight Loss ◽  
Wear Resistance ◽  
Pulse Current ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Wear Weight Loss ◽  
Sic Particles ◽  
The Coefficient Of Friction ◽  
Worn Surface ◽  
The Relationship

In this study, the SiC particles with a mean diameter of 300nm were used to be codeposited with Ni-P base to produce Ni-P-SiC composite coatings by means of the pulse current electroforming technology. The relationship between the SiC particles and phosphorous contents in the composite coatings has been constructed. The wear behavior of the Ni-P-SiC composite coatings was examined by that measurements data including the wear weight loss, the coefficient of friction, and the temperature increments under the wear tests, in which were correlated to the observation and analysis of the worn surface of the composite coatings. Experimental results show that the wear resistance of Ni-P-SiC composite coatings is superior to Ni-P composite coatings, if they are under the same level of hardness. In addition, the wear weight loss of Ni-P-SiC composite coatings is even about 62% less than that of Ni-P composite coatings, if they are based on the same production conditions. Further more, both the hardness and wear resistance of Ni-P-SiC composite coatings are superior to pure Ni coating, wherein its wear resistance is even up to 10 times better than that of pure Ni coating.

scholarly journals Strengthening of the Restored Surface Layer of Steel Parts 45 by Laser Boring

2018 ◽  
Vol 7 (4.3) ◽  
pp. 71
Author(s):  
Oleg Cherneta ◽  
Vadim Kubich ◽  
Roman Voloshchuk ◽  
Vladimir Averyanov ◽  
Dmytro Shmatko ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Laser Treatment ◽  
Complex Structure ◽  
Pulsed Laser ◽  
Thin Layers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Processing Zone ◽  
The Relationship

By means of the proposed technologies, the relationship and strengthening of the optimal modes of recovery of the restoring layer and the optimal laser treatment modes with bat-retaining straps are chosen. The microstructural, X-ray diffraction studies of the restored surfaces of the cams of the distributing shaft of the car were determined, the wear resistance and microhardness of the working surfaces were determined. By means of the proposed technologies of restoration and strengthening, optimum modes of applying the restoring layer and optimal modes of laser treatment (pumping energy of 20 kJ without melting of the surface) with bat-retaining coatings (thickness 2 mm) were chosen. The unevenness of the pulsed laser treatment with the restriction of the diameter of the laser spot and the treatment of a boron-rich surface layer with overlapping of the corresponding zones leads not only to the quenching but also to the release of individual local microparticles. New phases such as boron carbide, carbides - borides, iron borides, and others are formed. The strengthened surface layer has a complex structure and generally contains a martensite base with thin layers of borides, сarbides. The microhardness of the processing zone rises 3-4 times (Нμ 6500-7000 MPa).  

Investigation of the relationship between wear resistance in dry friction and mechanical properties of sintered composites of the Al-Sn system

2020 ◽  
Vol 5 ◽  
pp. 55-65
Author(s):  
N.M. Rusin ◽  
◽  
A.L. Skorentsev ◽  
M.G. Krinitsyn ◽  
◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Grain Boundaries ◽  
Dry Friction ◽  
Aluminum Matrix ◽  
Treatment Method ◽  
Mechanical And Tribological Properties ◽  
Angular Pressing ◽  
Silicon Doped ◽  
The Relationship

Effect of tin-insoluble alloying elements (Zn, Si) on the mechanical and tribological properties of the Al-40Sn sintered composite has been studied. Powder mixtures with alloying additions were sintered at a temperature above the melting point of tin (232°C). Sintered specimens had residual porosity, which negatively affected the strength, ductility, and wear resistance of the composite under dry friction. Compression in a closed die and equal channel angular pressing (ECAP) at a temperature of 250°C reduced the porosity of the material and significantly increased its strength and ductility. Regardless of the pressure treatment method, the compacted specimens showed good wear resistance. The main mechanism of composite wear is the exfoliation of matrix grains in the surface layer due to their shift along the tin interlayers in the direction of friction. The shear and peeling of grains were preceded by a strong deformation of the surface layer, in which the grain boundaries with tin interlayers were stretched in the direction of friction, that is, a layered structure was formed. Composites in which most of the grain boundaries of the aluminum matrix are oriented perpendicular to the sliding direction have the maximum wear resistance. A similar structure is formed in the plane of the material flow during ECAP processing. It was found that the wear resistance of a composite with a zinc-doped matrix is higher than with a silicon-doped matrix.

scholarly journals The relationship between the wear resistance of CMC and MMC and the worn surface structure parameters

2018 ◽  
Author(s):  
N. L. Savchenko ◽  
I. N. Sevostyanova ◽  
V. R. Utyaganova ◽  
T. Yu. Sablina ◽  
S. F. Gnyusov
Keyword(s):  
Wear Resistance ◽  
Surface Structure ◽  
Structure Parameters ◽  
Worn Surface ◽  
The Relationship

Investigation on Wear Resistance of Al-Si-Ti Piston Alloys Produced by Electrolysis

2007 ◽  
Vol 546-549 ◽  
pp. 905-910
Author(s):  
Jing Pei Xie ◽  
Jie Fang Wang ◽  
Ai Qin Wang ◽  
Wen Yan Wang ◽  
Ji Wen Li ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Yield Strength ◽  
Wear Mechanism ◽  
Aluminium Alloys ◽  
Density Of Dislocations ◽  
Eutectic Si ◽  
Worn Surface ◽  
The Relationship ◽  
Ti Content ◽  
Titanium Aluminium

The wear resistance, microstructures, worn surface morphology, TiAl3 phases, eutectic Si particles and the high density of dislocations of the Al-Si-Ti piston alloys have been studied by means of SEM and TEM. The electrolytic low-titanium aluminium alloys were used to make the Al-Si-Ti pistons alloy, the experiment results showed that the wear resistance of the Al-Si-Ti alloy was 1.49 times of that of the Al-Si alloy, and the wear mechanism was mainly plastic deformation wear. The relationship between wear resistances and the yield strength of the Al-Si-Ti piston alloys were established, and the wear mechanism investigated by mean of plastic-elasticity theory. When Ti content is reached to 0.12%, the yield strength of the Al-Si-Ti piston alloy increased from 255 Mpa to 358 Mpa.

Magnetostructural relationships in [Ni(dmit)2] − radical anions

2021 ◽  
Author(s):  
Jhon Enrique Zapata Rivera ◽  
Carmen J. Calzado
Keyword(s):  
Magnetic Properties ◽  
Radical Anions ◽  
The Relationship

This work explores the relationship between the magnetic properties of salts based on the [Ni(dmit)2]− radicals and the different arrangement that these radicals can adopt in the crystals, induced by...

Magnetic properties of Fe and Co nanoclusters embedded in the first Cu(100) surface layer

JETP Letters ◽  
2014 ◽  
Vol 99 (11) ◽  
pp. 646-649 ◽  
Author(s):  
A. L. Klavsyuk ◽  
S. V. Kolesnikov ◽  
A. M. Saletsky
Keyword(s):  
Magnetic Properties ◽  
Surface Layer

Variations in magnetic properties of Mexican serpentinites and related micro-textures 

2021 ◽  
Author(s):  
Sandra B. Ramírez-García ◽  
Luis M. Alva-Valdivia
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Ultramafic Rocks ◽  
Magnetic Carrier ◽  
Temperature Dependent ◽  
Geochemical Studies ◽  
The Relationship ◽  
Magnetite Formation

<p>Magnetite formation of serpentinized ultramafic rocks leads to variations in the magnetic properties of serpentinites; however, magnetite precipitation is still on debate.</p><p>In this work, we analyzed 60 cores of ultramafic rocks with a variety of serpentinization degrees. These rocks belong to the ultramafic-mafic San Juan de Otates complex in Guanajuato, Mexico. Geochemical studies have been previously conducted, enabling us to compare changes in the magnetic properties against the chemical variations generated by the serpentinization process. By studying the density and magnetic properties such as anisotropy of magnetic susceptibility, hysteresis curves as well as magnetic and temperature-dependent susceptibility and, we were able to identify the relationship between magnetic content and serpentinization degree, the predominant magnetic carrier, and to what extent the magnetite grain size depends on the serpentinization.  Variations in these parameters allowed us to better constrain the temperature at which serpentinization occurred, the generation of other Fe-rich phases such as Fe-brucite and/or Fe-rich serpentine as well as distinctive rock textures formed at different serpentinization degrees.</p>

Effects of attapulgite on the worn surface and fretting wear resistance property of UHMWPE composites

2020 ◽  
Vol 72 (7) ◽  
pp. 821-827
Author(s):  
Zhaojie Meng ◽  
Yunxia Wang ◽  
Xiaocui Xin ◽  
Hao Liu ◽  
Yunfeng Yan ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Peer Review ◽  
Filler Content ◽  
Resistance Mechanism ◽  
Three Dimensional ◽  
Fretting Wear ◽  
Wear Property ◽  
Pressing Method ◽  
Content Type ◽  
Worn Surface

Purpose The purpose of this study is to examine the fretting wear property of ultra-high molecular weight polyethylene (UHMWPE)-based composites reinforced by different content of attapulgite. Design/methodology/approach A series of composites were prepared by a hot-pressing method. Fretting tests were carried out using an SRV-IV oscillating reciprocating friction wear tester with a load of 10 N and a frequency of 100 Hz. The morphology of the fracture structure and the worn surface was observed by field-emission scanning electron microscopy, X-ray diffraction and a non-contact three dimensional surface profiler. Findings With the addition of attapulgite, the microstructure of the composites become more regular, and their heat resistance improved. Furthermore, the friction coefficient and the specific wear rate of the composites with lower filler content reduced compared with that of neat UHMWPE, and the optimum filler content is 1 per cent. Originality/value The study investigated the fretting resistance mechanism of the attapulgite in the UHMWPE matrix. The results could help to provide some experimental evidence for the broader application of silicates on the fretting wear resistance of polymers. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0420/

Sign in / Sign up

Export Citation Format

Share Document