Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Pin-on-disk

Fig. 10. Wear rates for iron, as measured in a pin-on-disk machine (-) unimplanted and implanted with ( ) nitrogen at rates in atoms /cm of A,... Fig. 10. Wear rates for iron, as measured in a pin-on-disk machine (-) unimplanted and implanted with ( ) nitrogen at rates in atoms /cm of A,...
Table 11 gives Older of magnitude wear rates for high temperature materials sliding against themselves in pin-on-disk tests (30). [Pg.7]

The temperature during test is often not known. A comprehensive investigation of the temperature for the test wheel in a modified Lamboume abrader has been made by Ramakrishnan et al81 using an infrared camera. The predicted rise for thermoplastics in a pin on disk system has been compared with measurements82 and, presumably, the calculation could be applied to other circumstances. [Pg.239]

DePalma and Tillman investigated self-assembled monolayer films from three silanes, tridecafluorooctyltrichlorosilane, undecyltrichlorosilane, and octadecyl-trichlorosilane, on silicon, a popular model substrate for such studies with great relevance to potential semiconductor coating applications. They characterized the films by ellipsometry and contact angle measurements (data for trideca-fluorooctyltrichlorosilane are included in Table 1), but more usefully from an applicational viewpoint, they carried out friction and wear measurements with a pin-on-disk device where the silicon wafer substrate, coated with monolayer, is moved under a spherical glass slider. Optical microscopy was used to assess wear. Table 2 summarizes DePalma and Tillman s data and their comparison with the classical self-assembled monolayer friction studies of Levine and Zisman [18]. [Pg.71]

Classical, macroscopic devices to measure friction forces under well-defined loads are called tribometers. To determine the dynamic friction coefficient, the most direct experiment is to slide one surface over the other using a defined load and measure the required drag force. Static friction coefficients can be measured by inclined plane tribometers, where the inclination angle of a plane is increased until a block on top of it starts to slide. There are numerous types of tribometers. One of the most common configurations is the pin-on-disk tribometer (Fig. 11.6). In the pin-on-disk tribometer, friction is measured between a pin and a rotating disk. The end of the pin can be flat or spherical. The load on the pin is controlled. The pin is mounted on a stiff lever and the friction force is determined by measuring the deflection of the lever. Wear coefficients can be calculated from the volume of material lost from the pin during the experiment. [Pg.230]

Typical industrial plastic selection criteria have focused on pin-on-disk tests (involving plastic sliding over steel) and sand slurry abrasion tests. The CMP environment, however, is very different from these typical industrial tests. In CMP, the retaining ring plastic is subjected to a plastic-to-plastic adhesive force component involving the polyurethane pad, chemical attack from the chemicals in the slurry, as well as an abrasive component associated with slurry particles. [Pg.111]

Extensive study has been carried out on the tribological properties of DLC. Different types of tribo-testers such as ball-on-disk and pin-on-disk have been used at low sliding speed or reciprocating conditions to find the friction coefficient as well as the wear rate of the coating. [Pg.358]

A novel method is the small punch analysis, or pin on disk test, which is used to evaluate the weight loss of friction material. It is performed with a metallic pin in friction contact on a sample (small disk) the pin, moving cyclically, yields a stress-strain curve related to the specimen wear. This test is generally performed on retrieved, or aged, UHMWPE components. [Pg.583]

L-P106, LB102, LB106, and L-T102 were studied as 1 wt.% additives of PGDO in pin-on-disk tests for AISI 52100 steel/ASTM 2011 Al contacts at 25°C and 100°C... [Pg.218]

Pin-on-disk tests for neat PA6 and for PA6+3 wt.% IL blend disks were carried out against AISI 52100 steel pins at varying temperatures (-35,25, and 67°C) [51]. The results showed that PA6+3% IL produced low constant friction values under the entire range of temperatures, so the addition of IL reduced the influence of temperature on the tribological properties of PA6. This was attributed to the formation of stable adsorbed layers of highly polar IL molecules on the steel surface. [Pg.220]

Bermudez et al. [67] studied the tribological properties of PC+0.5%ZnO+1.5% IL composites and showed an 80% friction reduction and wear reduction of nearly two orders of magnitude with respect to PC+0.5% ZnO. They then investigated ILs as an effective lubricant additive of epoxy resin under the pin-on-disk configuration and showed a friction reduction higher than 50% and a wear rate reduction of two orders of magnitude for epoxy resin (RE)+1.5% IL with respect to the neat Re and Re+0.5% ZnO [68], The ability of ILs to act as lubricant additives of polymers under sliding conditions can thus be confirmed by the above report. [Pg.220]

The flash temperature is also related to types of tribomachines. Each type of machine has its specific type of contact geometry and style. For example, on a four-ball lubricant testing machine, the flash temperature is totally different from that of a sliding pin on disk. The A7max temperature for a standard four-ball wear contact may be calculated from a Blok equation 18... [Pg.72]

Pin on disk, hardened alloy cast iron. MPa). From data by A. Dorinson [15]. [Pg.189]

Pure sliding Journal in bearing Piston/cylinder Cam/fixed follower Pin on disk Pin on ring Block on ring... [Pg.351]

T. Tanaka, J. Tamura, K. Kawanabe, M. Nawa, M. Uchida, T. Kokubo, and T. Nakamura. Phase stability after aging and its influence on pin-on disk wear properties of Ce-TZP/A Os nanocompopsite and conventional Y-TZP. J. Biomed. Mater. Res. A, 67, 200-07 (2003),... [Pg.412]

Wear-Testing Apparatus and Experimental Procedures. To study the effect of temperature on the wear behavior of specimen polymers, the pin-on-disk type wear testing apparatus used in our previous work (] J was employed and the frictional force and wear depth of the flat ended polymer pins 3 mm in diameter were measured at a sliding speed of 0.1 m/s under a load of 10 N and at various experimentally possible disk temperatures up to 300. The disk was made of stain-... [Pg.104]

Figure 4 presents what is commonly referred to as the pin-on-disk friction and wear device. A hemispherical rider mounted in a beam is loaded against a rotating disk. The disk is rotated uni-direct ionally. The beam containing the rider is mounted in a gimbal which is connected to a strain gage assembly for measuring friction force. [Pg.290]

With the X-ray technique described stresses in polymer wear films can be measured. One could incorporate a pin-on-disk friction device within the opening of the X-ray camera and conduct in situ measurements. The stresses developed in the film with repeated passes, increasing load, varied sliding speeds and polymer compositions can be measured. This could lead to a better understanding of the role of stresses in polymers on their wear behavior. [Pg.298]

In order to study the effect of the degree of crystallinity on friction and wear of PET, the friction measurements in which the steel sphere was slid on flat PET surfaces were carried out. Measurements of the friction and wear rate were also made on the PET pins sliding against a smooth steel surface at a speed 0.1 m/s under a load 10 N by means of a pin-on-disk type apparatus. The PET specimens of four different crystallinity (8, 39, 55 and 75 % ) were used in the present work. The specimen of the lowest crystallinity had a structure similar to an amorphous polymer, while two specimens of crystallinity, 39 % and 55 % had a spherulite-like structure. The highest crystallinity had a fiber-like structure. Conclusions obtained are as follows ... [Pg.373]

Studies with a pin-on-disk apparatus have been performed to elucidate the tribological behavior of aramid containing pol5mier composites. These studies include theoretical considerations and can serve as a diree-tive on how to get information about tribologieal and wear properties in other related systems. ... [Pg.433]

Friedersdorf FJ., Holcomb R. Pin-on-disk corrosion wear test. Journal of Testing and Evaluation JTEVA, 26(4) 1998 352-357. [Pg.183]

As with other mechanical properties there are standard tests to measure wear resistance. The main method is described in ASTM G99, which uses a pin-on-disk apparatus. This test is used to measure sliding wear of ceranucs and ceramic coatings. [Pg.338]


See other pages where Pin-on-disk is mentioned: [Pg.8]    [Pg.162]    [Pg.275]    [Pg.8]    [Pg.231]    [Pg.178]    [Pg.178]    [Pg.183]    [Pg.216]    [Pg.464]    [Pg.541]    [Pg.604]    [Pg.30]    [Pg.303]    [Pg.305]    [Pg.307]    [Pg.309]    [Pg.311]    [Pg.314]    [Pg.364]    [Pg.60]   
See also in sourсe #XX -- [ Pg.358 ]




SEARCH



Pin, pins

Pinning

© 2024 chempedia.info