Continuous Method for Assessment of Wear under Conditions of Technically Dry Friction

2006 ◽  
Vol 113 ◽  
pp. 415-419
Author(s):  
Czesław Pakowski ◽  
Tomasz J. Kałdoński ◽  
Tadeusz Kałdoński
Keyword(s):  
Thermal Expansion ◽  
Dry Friction ◽  
Linear Dimension ◽  
Continuous Method ◽  
Kinematic Pair ◽  
Size Change ◽  
Simple Method ◽  
Total Wear ◽  
Pin On Disk

In the article a continuous method for measurement of wear under conditions of technically dry friction of tribological kinematic pairs of the type pin–on–disk of T–11 tester, as an example is presented. Also taken up was a test of an evolved simple method for evaluation of correction on the participation of thermal expansion in size change of a frictional kinematic pair. The analysis of obtained results showed the existence of correlation between total experimental wear and analytical value of total wear (decrease of linear dimension of pin).

Shape Memory Ceramics

1999 ◽  
Vol 604 ◽  
Author(s):  
T. Matsumura ◽  
T. Nakamura ◽  
M. Tetsuka ◽  
K. Takashina ◽  
K. Tajima ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Shape Memory ◽  
Silica Glass ◽  
Size Change

AbstractThree types of shape memory ceramics were introduced. They were the irreversible shape memory silica glass, the reversible shape memory bi-ceramics glass and reversible shape memory silica and Si-C-O glassy fiber samples (the small size change) induced by thermal expansion.

scholarly journals A Pin-on-Disk Experimental Set-up for Vibrational Smoothing of Dry Friction

PAMM ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 275-276 ◽  
Author(s):  
Simon Kapelke ◽  
Wolfgang Seemann
Keyword(s):  
Dry Friction ◽  
Set Up ◽  
Pin On Disk ◽  
Vibrational Smoothing

scholarly journals Critical and co-operative phenomena. V. Specific heats of solids and liquids

1940 ◽  
Vol 174 (956) ◽  
pp. 102-109 ◽  
Keyword(s):  
Free Energy ◽  
Thermal Expansion ◽  
Quantum Effects ◽  
Dense Gas ◽  
Critical Temperatures ◽  
Simple Method ◽  
Specific Heats ◽  
Lennard Jones ◽  
Boiling Points ◽  
Satisfactory Theory

In the first two papers in this series (Lennard-Jones and Devonshire 1937-8) we developed a simple method of calculating the free energy of a dense gas or a liquid in terms of interatomic forces. We used this to calculate critical temperatures and also vapour pressures and boiling-points. In later papers (Lennard-Jones and Devonshire 1939) we showed that the model used in the earlier papers was more appropriate to a solid than to a liquid, and that to obtain a satisfactory theory for a liquid we must modify it by introducing the concept of disorder. In this way we were able to account satisfactorily for the phenomenon of melting. In this paper we propose to use the expression for the free energy obtained in the earlier papers to calculate the specific heats of solids and liquids, and also the coefficients of thermal expansion and compressibilities. As before, we confine ourselves to the case when quantum effects are negligible.

THE FRICTION AND WEAR CHARACTERISTICS OF SI3N4 CERAMIC AGAINST SI3N4 CERAMIC ZRO2 CERAMIC AND CHILLED CAST IRON AND AL2O3 CERAMIC UNDER DRY FRICTION

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2700-2705
Author(s):  
XIAO TIAN ◽  
JIANGANG NIU ◽  
CUIBIAO WANG
Keyword(s):  
Cast Iron ◽  
Silicon Nitride ◽  
Dry Friction ◽  
Friction And Wear ◽  
Normal Load ◽  
Si3n4 Ceramic ◽  
Pin On Disk ◽  
Wear Maps ◽  
Chilled Cast Iron ◽  
Friction And Wear Characteristics

The friction and wear of silicon nitride ( Si 3 N 4) against silicon nitride ( Si 3 N 4) and zirconia (Y–TZP) and chilled cast iron and Alumina sliding under dry friction at room temperature conditions were investigated with pin-on-disk tribometer at sliding speed of 0.56ms-1 and normal load of 50N, 80N, respectively. Based on the variety regulation of the wear maps, the wear mechanisms of the two couples were analyzed. Get the result of friction coefficient and maps of wear Rate of the Pin and the Disk. The results of comparing this couple is Si 3 N 4/ chilled cast iron < Si 3 N 4/ ZrO 2< Si 3 N 4/ Si 3 N 4< Si 3 N 4/ Al 2 O 3.

Influences of Gases on the Tribological Properties of Pure Iron

2011 ◽  
Author(s):  
Kanao Fukuda ◽  
Joichi Sugimura
Keyword(s):  
Tribological Properties ◽  
Dry Friction ◽  
Pure Iron ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
The Other ◽  
Vacuum Vessel ◽  
Friction Coefficients ◽  
Wear Rates ◽  
Pin On Disk

In this study, trace oxygen and water as impurities in experimental gas environments were reduced to less than 10 ppb to eliminate their influences on the tribological properties. A pin-on-disk apparatus in an ultra-high vacuum vessel equipped with a gas filtering system enabled pure experimental gas environments. Dry friction tests clarified that the tribological properties of pure iron in ultra-high vacuum and argon were similar to each other. On the other hand, friction coefficients obtained in hydrogen and nitrogen were considerably lower than those obtained in ultra-high vacuum and argon. Specific wear rates of pin and disk were close to each other in ultra-high vacuum, argon and hydrogen while those took very different values in nitrogen. Hydrogen influenced the tribological properties of pure iron to some extent but the influences were not as much as that of nitrogen.

Study of the Effect of Type (Cu, Ti and Cu, Mo) Electrospark Coatings on Friction in Pin-on-Disk Testing

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Antoszewski Bogdan ◽  
Evin Emil ◽  
Audy Jaromír
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Competitive Advantage ◽  
Dry Friction ◽  
Bottom Layer ◽  
Surface Coatings ◽  
Commercial Exploitation ◽  
Steel Material ◽  
Pin On Disk ◽  
Disk Testing

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.

scholarly journals Microstructure and Tribological Performance of Mesocarbon Microbead–Silicon Carbide Composites

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3127 ◽  
Author(s):  
Xiaojie Wang ◽  
Xiumin Yao ◽  
Hui Zhang ◽  
Xuejian Liu ◽  
Zhengren Huang
Keyword(s):  
Silicon Carbide ◽  
Tribological Properties ◽  
Dry Friction ◽  
Tribological Performance ◽  
Wear Process ◽  
Lubricating Film ◽  
Sic Composites ◽  
Pin On Disk ◽  
Disk Method ◽  
Pls Method

Mesocarbon microbead–silicon carbide (MCMB–SiC) composites with 0–30 wt % MCMBs were prepared by pressureless sintering (PLS) method at 2200 °C in Ar. The microstructure and tribological properties of the prepared composites were investigated. The results show that there was a finer grain size of SiC with the increase in MCMB content because MCMBs hinder the growth of SiC grains. The hardness of the composites decreased with increasing MCMB content, whereas the fracture toughness fluctuated showing a complex trend. The tribological properties of the composites under dry friction conditions were evaluated using the pin-on-disk method against a SiC counterpart. We found that the tribological properties of the samples were influenced by the oxide film or lubricating film that formed during the wear process on wear surfaces. Different wear mechanisms were found to be associated with differing MCMB contents.

Fractal Prediction Model of Friction Coefficient in Dry Friction Pair

2011 ◽  
Vol 301-303 ◽  
pp. 315-320
Author(s):  
Jun Jie Zhou ◽  
Shi Hua Yuan ◽  
Chao Wei
Keyword(s):  
Friction Coefficient ◽  
Friction Pair ◽  
Surface Profile ◽  
Real Contact Area ◽  
Size Change ◽  
Contact Loads ◽  
Fractal Parameters ◽  
Dimension Change ◽  
Model Of Friction ◽  
Pin On Disk

To research the friction coefficient of rough surface under different contact loads. A mathematical model is proposed between the fractal parameters D and G and the non-dimensional real contact area based on M-B fractal contact model, surface profile curves are scanned by APE500 surface morphology, dimension change index k and size change index s are identified in tests, the model is verified on UMT-3 pin-on-disk wear apparatus. Results showed that the modeling method relying on limiting cases is feasible, this model could improve prediction accuracy of friction coefficient, and the experimental results are consistent with the theoretical prediction.

Investigation of Vibrations Induced by Dry Friction in a Pin-on-Disk Experimental Set-up

PAMM ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. 375-376
Author(s):  
Simon Kapelke ◽  
Lukas J. Oestringer ◽  
Wolfgang Seemann
Keyword(s):  
Dry Friction ◽  
Set Up ◽  
Pin On Disk
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