Antibioitc Disk Testing v1 (protocols.io.ugfettn)

protocols.io ◽  
2018 ◽  
Author(s):  
Aubrey Reed ◽  
Nicole Sunshine ◽  
Renae Lyons
Keyword(s):  
2014 ◽  
Vol 40 (4) ◽  
pp. 185-192 ◽  
Author(s):  
S. D. Buliga ◽  
Yu. N. Gnedin ◽  
T. M. Natsvlishvili ◽  
M. Yu. Piotrovich ◽  
N. A. Silant’ev

Author(s):  
Markus A. Wimmer ◽  
Valentina Ngai ◽  
Joachim Kunze

Current protocols employed to measure wear of ultra-high molecular weight polyethylene (UHMWPE) utilize gravimetric and/or topographic measurement techniques. However, these methods may be subject to error due to creeping and fluid absorption capabilities of polyethylene. A novel process designed to avoid these errors was developed using Europium (Eu) as a tracer material to quantify polyethylene wear. Eu is a rare earth element that does not naturally occur in the human body and can be quantified using ICP-MS. By combining a solution of Eu – stearate with nascent UHMWPE powder, 9.5 mm diameter pins were molded and subjected to pin-on-disk testing. Samples of the testing lubricant were obtained at regulated intervals. These samples were analyzed for Eu quantification, which were then compared with the gravimetric pin measurements.


2019 ◽  
Vol 28 (6) ◽  
pp. 369-377
Author(s):  
Oleg V Lebedev ◽  
Olga I Bogdanova ◽  
Galina P Goncharuk ◽  
Alexander N Ozerin

The relationship between surface- and bulk-related physical and mechanical characteristics of polypropylene (PP)-based composites filled with nanodiamond soot (NDS) particles was investigated. The tribological properties of a composite were considered as surface properties. Wear and friction coefficient values were measured using a steel pin-on-composite disk testing procedure under the justified set of test parameters. Loading of NDS particles to the PP matrix resulted in a drastic increase in the composite’s wear resistance. A significant increase in friction coefficient and contact temperature was observed for the composites with NDS content below a certain value assumed to be the percolation threshold for the selected processing method and components used. After the percolation threshold is reached, the friction coefficient decreases sharply and returns to the value characteristic of a filler-free PP. The effects observed were attributed to changes in properties of polymer matrix and composite melt.


2021 ◽  
Author(s):  
Rodolpho F. Vaz ◽  
Sergi Dosta ◽  
Irene G. Cano ◽  
Anderson G.M. Pukasiewicz

Abstract FeMnCrSi and 316L alloy coatings were deposited on carbon steel substrates via high-pressure cold gas spraying and their microstructure, hardness, and wear resistance were obtained. Ball-on-disk testing (ASTM G99) was used to measure sliding wear behaviors. The mechanism of wear was found to be the same for both coatings, although FeMnCrSi had a higher coefficient of friction while 316L had less volume loss.


2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Antoszewski Bogdan ◽  
Evin Emil ◽  
Audy Jaromír

Recent advances in the commercial exploitation of electrospark coatings have focused on improving surface roughness by depositing Ti, Mo, V, or W over an interlayer of Cu, Sn, Pb, or Cd on the top of a tool steel material. This paper presents results of a systematic pin-on-disk experimental study of different type bilayer coatings (Cu–Sn/bronze, bottom layer; Ti and Mo, top layer) deposited on a Type 45 steel. The results are discussed in terms of friction coefficients obtained under different dry-friction conditions (speeds ranging from 0.3m∕sto0.8m∕s, and pressures ranging from 10Nto40N). An additional focus is on scuffling resistance of faces in friction, microhardness and surface roughness of coated items, and the competitive advantage of using advanced surface coatings.


1991 ◽  
Vol 239 ◽  
Author(s):  
C. Tsai ◽  
J. Nelson ◽  
W. Gerberich ◽  
J. Heberlein ◽  
E. Pfender

ABSTRACTA three-step process for producing a composite diamond film is presented. Plasma deposited diamonds are reinforced by an electroplated metal binder and the diamonds regrown to produce a continuous, strongly adhered diamond film on molybdenum and tungsten substrates. Microscratching and pin-on-disk testing indicate that the composite films are more adherent than plasma deposited diamonds alone.


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