... the material surface and promote oxidation. On the other hand, the oxide layer formed on the surface can protect the surface from wear or promote wear damage, which depends on its characteristics influenced by the environment. Email: zsz@tju.edu.cn Email: c_tian@tju.edu.cn Email: liuliyan...

... to the presence of BN which act as solid lubricant. The wear mechanisms are thermal softening, melting, oxidation, abrasion, and delamination. Fig. 12 EDS analysis of the samples ( a ) Mg and ( b ) Mg/0.25 BN (load of 10 N for a sliding speed of 80 mm s −1 ) Figure 13 shows the worn surfaces...

.... Second, the compactly oxide layers resulting from oxidation of the α-Fe on the worn surfaces also decreases the wear rate of Fe-B alloys. On the whole, the wear rate of the Fe 94.3 B 5.7 is lower than Fe 67 B 33 and Fe 75 B 25 . 02 11 2010 06 09 2011 10 10 2011 10 10 2011...

.... It was interesting to find that the wear mechanisms were influenced by the process of tribotesting. There are three competing wear mechanisms found, abrasion, adhesion, and oxidation. Each of those dominates the tribological performance under different conditions. The tribological performance of the samples...

...S. K. Das; Shubha Hegde; K. M. Godiwalla; S. P. Mehrotra; P. K. Dey A probabilistic model based methodology has been applied to describe the relative rate of material loss from the steel surface subjected to simultaneous action of high temperature oxidation and mechanical erosion. Growth...

... performed much better at 260 ° C than at 370 ° C , due to thermal oxidation. On the other hand, silicone oil exhibited the worst performance at 260 ° C and the best performance at 370 ° C . In both boron nitride lubricant variants, the polydimethyl siloxane facilitated hydrostatic/hydrodynamic lubrication...

... with oxidation or hot corrosion resistance, is required. In the present work, NiCrAlY and Ni - 20 Cr metallic coatings were deposited on an iron-based superalloy by a shrouded plasma spray process. The coatings were characterized by scanning electron microscopy, optical microscopy, microhardness testing, and x...

... specimens failed by subsurface cracking during tribotesting on the machine, and the failures were similar to those that occur in-vivo. The fatigue behavior of the polymer was analyzed to determine its relationship to oxidation and stress state in the rolling/sliding cylinder. At the 20 MPa test load...

... for increasing alumina mole percentage. Titanium carbide additions markedly increased the activation energy. This increase indicates a competitive oxidation reaction that forms titanium oxide, as confirmed by X-ray diffraction (XRD). As a result of these observations, titanium oxide was also mixed with graphite...

... graphitization for carbon debris and smears but not for carbon within wear tracks. The carbon of wear tracks was also considered graphitized but was very superficial. Decomposition of TiC in DLC-coated and uncoated sliders was also observed and caused by carbon diffusion and titanium oxidation. Diffused carbon...

...Sarah K. Young; Tony S. Keller; Keith W. Greer; Michael C. Gorhan An AMTI knee simulator was used to evaluate the wear of UHMWPE tibial inserts which were gamma sterilized in air and displayed a high or low level of oxidation. After 5 million cycles, four out of five samples from the high oxidation...

..., along with analysis of the properties of UHMWPE material from retrieved bearings, had shown that a large number of the bearings suffered from subsurface oxidation. This oxidation was related to the gamma irradiation used to sterilize the tibial bearings. Mechanical properties of the polymer were...