The Investigation of Material Transfer Characteristics and Surface Morphology of PtIr Contact Materials

2012 ◽  
Vol 271-272 ◽  
pp. 305-309
Author(s):  
Sai Bei Wang ◽  
Ming Xie ◽  
You Cai Yang ◽  
Ji Ming Zhang ◽  
Yong Tai Chen ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Low Voltage ◽  
Testing Machine ◽  
Material Surface ◽  
Resistive Load ◽  
Contact Material ◽  
Material Transfer ◽  
Contact Materials ◽  
Transfer Characteristics ◽  
Electrical Erosion

Material transfer characteristics and surface morphology of contact material reflects their electrical erosion performance. In this paper, by using a JF04C contact material testing machine, the characteristics of electrical erosion of PtIr contact materials are acquired under low voltage, resistive load and small current. By means of an electronic balance and SEM, the material transfer values of the PtIr contact materials and the characteristics of contact material surface profile are obtained and analyzed. The results show that PtIr alloy contact materials mainly transfer from cathode to anode and its breaking arcs are metallic phase.

THE RESISTANCE AND ARC EROSION CHARACTERISTICS OF Ag/LaFe1-xNixO3 CONTACT MATERIAL

2007 ◽  
Vol 21 (15) ◽  
pp. 2635-2645
Author(s):  
NA YIN ◽  
CHENG-JIAN WANG ◽  
XUE-YAN LIU ◽  
CHUN-MING WANG ◽  
DONG-GANG RAN ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Low Voltage ◽  
Contact Material ◽  
Contact Materials ◽  
Arc Erosion ◽  
Arc Characteristics ◽  
Conductive Ceramics ◽  
Surface Analysis Method ◽  
Resistance Performance ◽  
Transfer Properties

The resistance, mass transfer, erosion and arc properties of a new contact material named Ag/LaFe 1-x Ni x O 3 conductive ceramics were investigated. Ag/LaFe 1-x Ni x O 3 performed well under low voltage conditions in contrast with other contact materials such as Ag/CdO and Ag/SnO 2. After 5000 make-and-break operations, life test was made and the surface analysis method together with an arc voltage waveform was used to research the corrosion resisting and mass transfer properties. It was found that the conductive ceramics used in the contact materials could influence the resistance performance and, in turn, influence the mass transfer, erosion and arc characteristics.

Material transfer behavior of AgTiB2 and AgSnO2 electrical contact materials under different currents

2017 ◽  
Vol 114 ◽  
pp. 139-148 ◽  
Author(s):  
Hangyu Li ◽  
Xianhui Wang ◽  
Xiuhua Guo ◽  
Xiaohong Yang ◽  
Shuhua Liang
Keyword(s):  
Electrical Contact ◽  
Material Transfer ◽  
Contact Materials ◽  
Transfer Behavior ◽  
Electrical Contact Materials

scholarly journals The Effect of Immersion Time of Coconut Fiber in Limestone Water on Tensile Strength and Surface Morphology

2020 ◽  
Vol 55 (3) ◽  
Author(s):  
Sutrisno ◽  
Rudy Soenoko ◽  
Yudy Surya Irawan ◽  
Teguh Dwi Widodo
Keyword(s):  
Tensile Strength ◽  
Surface Morphology ◽  
Mass Fraction ◽  
Immersion Time ◽  
Testing Machine ◽  
Coconut Fiber ◽  
Tensile Testing Machine ◽  
X Ray ◽  
Coir Fibers ◽  
Infrared Spectrometer

This study aims to identify the effect of immersion of coconut fiber in limestone water on surface morphology and tensile strength, including chemical reactions during immersion. Coconut coir fibers were immersed in a solution of limestone water for 0, 4, 8, 12, 16, and 20 hours, with a mass fraction of limestone of 5%, then dried for 1 hour. Coconut fiber was characterized by a single fiber tensile testing machine, Scanning Electron Microscope, X-ray diffractometer, and Fourier transform infrared spectrometer. The results showed that the percentage of 5% with 8 hours of immersion in the fiber had a cleaner surface morphology with a tensile strength of 234.62 MPa. Therefore, as an alternative to improving the characteristics of a single thread, immersion in limestone water needs to be applied.

scholarly journals Electrochemical Analysis of Some Biodegradable Mg-Ca-Mn Alloys

2020 ◽  
Vol 70 (12) ◽  
pp. 4525-4531
Keyword(s):  
Surface Morphology ◽  
Optical Microscope ◽  
Ringer Solution ◽  
Mechanical Tests ◽  
Electrochemical Analysis ◽  
Material Surface ◽  
Electrochemical Tests ◽  
Potential Benefits ◽  
Qualitative Resistance ◽  
Bioresorbable Implants

The potential benefits of magnesium (Mg) over the other non-resorbable biomaterials, especially for orthopedic applications, are obvious. When fully realized, functional bioresorbable implants based on Mg alloys offer the mechanical advantages of a metal combined with the degradable and biological advantages of polymers and biomaterials. <1>In this article we obtained aMg-based prelate alloyed with Ca and Mn. It is known that Mn helps to refine the alloy’s microstructure, which adds to the elasticity of the material. Surface morphology was performed using the optical microscope and the electron microscope while the mechanical tests were performed using the tribometer. Also, the electrochemical tests were executed in the ringer solution. It has been mentioned that the electrochemical resistance is quite low. This study was conducted to determine the corrosion resistance of Mg-Ca-Mn alloys. It has been demonstrated that the addition of Mn refines the microstructure, increases the modulus of elasticity but does not have a qualitative resistance to corrosion.Also, the hardness of the material is quite low in comparison to other pre-alloys of Mg. Keywords: Surface morphology,mechanical tests, electrochemical tests

Performance of Different Silver/Tin Oxide Contact Materials for Applications in Low Voltage Circuit Breakers

2009 ◽  
Author(s):  
Jutta Rohberg ◽  
Thomas Honig ◽  
Norbert Witulski ◽  
Michael Finkbeiner ◽  
Volker Behrens
Keyword(s):  
Tin Oxide ◽  
Low Voltage ◽  
Circuit Breakers ◽  
Contact Materials

Noise-related roughness of railway wheel treads-full-scale testing of brake blocks

2000 ◽  
Vol 214 (2) ◽  
pp. 63-77 ◽  
Author(s):  
M Petersson
Keyword(s):  
Cast Iron ◽  
Hot Spots ◽  
Testing Machine ◽  
Full Scale ◽  
Spatial Distributions ◽  
Material Transfer ◽  
Railway Wheel ◽  
Rolling Noise ◽  
Brake Block ◽  
Abrasive Property

Results from full-scale tread braking experiments on an inertia dynamometer (brake testing machine) are presented. Eighteen prototypes of brake blocks are investigated. Two braking characteristics relating to the influence of the blocks on the wheel tread are studied: generation of hot spots and generation of roughness (corrugation, waviness). Wheel tread temperatures are measured during braking using an infrared (IR) technique. The wheel roughness is measured after each brake cycle when the wheel has cooled down. A roughness indicator, RλCA, relates measured roughness to expected rolling noise as generated by the wheel in operation. A correlation between the spatial distributions of temperatures and roughnesses is normally found: stronger for cast iron blocks and composition blocks and weaker for sinter blocks. The cast iron blocks are found to produce high tread roughness levels, partly owing to material transfer from brake block to wheel tread. The composition blocks are found to result in lower roughness levels than the cast iron blocks. Finally, the sinter metal blocks are found to lead to the lowest roughness levels, a fact which is probably due to the abrasive property of these blocks. Friction coefficients during braking are also measured.

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