Paper Tribology

Paper, an essential commodity in our day to day life. The following articles describes how Tribology plays an important role in paper manufacturing industries.

Friction in paper

Friction coefficient is an important parameter in paper production. Friction coefficient of paper is modified according to...Read More »

Ancient Tribology artifacts looted ??

Today’s article is neither about advances in Tribology nor about its application, its about the beginning of Tribology. Everyone who has studied tribology via formal or informal education must be familiar with the image of a wall painting (Image 1) inside the tomb of Djehutihotep in Deir el-Bersha...Read More »

Tribotronics: A merger of Tribology and Electronics

Tribotronics is a term coined by The Division of Machine Elements at Lulea University of Technology. Tribotronics in simple terms mean developing an active tribological system or converting a passive tribological system in to an active one. Tribotronics is still a concept and requires a lot of research...Read More »

Impact of water on Grease film thickness in rolling point contacts

In a rolling bearing, the load transmission is often accompanied by high contact stresses which may eventually lead to wear and/or fatigue. In order to ensure separation of moving parts leading to a long life, bearings are usually grease or oil lubricated. The separation of the moving parts in a...Read More »

Tribology in Abrasive Waterjets

Waterjet machining can be referred to as a material removal process which uses a high velocity stream of water or a mixture of water and abrasives. Waterjet machining can be categorized into: [1][3]

  1. Pure water jet: Soft materials such as paper products, sealing materials, plastics, foams, textiles,...Read More »

After the Mystery of Rotary Lip Seals

Lip seals compete with mechanical face seals in sealing oil or grease in rotary shaft applications. Under certain running conditions both kinds of seals can be used however, the latter ones are generally used for applications where a significant pressure difference needs to be preserved. Rotary lip seals are preferred...Read More »

Tribology in metal forming

Metal forming is a manufacturing process in which forces are applied on raw material such that stresses induced in the material are greater than yield stress and less than ultimate stress. The material experiences plastic deformation to change the shape of the component and converted to the desired...Read More »

Tribocatalysis: An overview


A catalyst is a substance that speeds up a chemical reaction, but is not consumed by the reaction; hence a catalyst can be recovered chemically unchanged at the end of the reaction it has been used to speed up, or catalyze. Catalysis is the increase in the rate of a...Read More »

Triboluminescence: Light it up

The term triboluminescence was coined by Wiedemann in 1888 and it basically means light from friction. The term triboluminescence comes from the Greek word tribein (meaning to rub) and the Latin prefix lumin (meaning light). Triboluminescence is a flash of light produced when a material is subjected to friction, impact or...Read More »

Friction is a possible reason for SpaceX Falcon 9 explosion

September 1 of 2016 at Cape Canaveral SpaceX lost is Falcon 9 rocket on a launch pad due to dramatic explosion. During a routine preflight fueling test, the  rocket and the $200 million Israeli Earth communication satellite Amos-6 were lost. No one was injured.

A...Read More »

Happy New Year and 2016 tribonet Awards

The holidays are here!  And here at tribonet, we would like to wish all our readers the very best for the new year.  Many blessings, love and happiness to the entire tribonet community!

It was a great year for tribonet, thanks to the readers and the authors! With the ending of...Read More »

Cryogenic treatment for increased wear resistance

The word cryogenics is taken from two Greek words “Cryo” – meaning frost or freeze and “genics” – meaning produce or generate. In physics, cryogenics is the study of production of low temperatures and to study behavior of materials at very low temperatures. Some of the advantages of...Read More »

Slurry Tribology

In technical terminology, a slurry is a mixture of solid particles in a liquid that can be readily pumped. The following article describes the use of tribology in understanding slurry related wear prevalent in drilling operations.

Non-productive time (NPT) is a three letter acronym which may be...Read More »

Triboelectricity: Generating electricity by friction

Friction is a necessary evil. Without friction, we cannot walk, we cannot hold objects in our hands, cannot light matchsticks and cannot even stop fast moving vehicle. But apart from these things there is very useful side of friction which can be utilized to develop clean energy. Triboelectricity...Read More »

Sports tribology

Tribology is a term used to define combination of friction, wear and lubrication. Tribology has been used in various fields to improve reliability and longevity of systems. Sports engineering applies engineering disciplines like mathematics, physics, and material science in order to solve sporting problems [1]. Tribological problems are...Read More »

Space tribology

The universe is an ocean of mysteries. The space science community has been working very hard to solve this massive puzzle. Space exploration missions have played a key role in enhancing our knowledge about planets, comets, space phenomenon’s and theories of birth of universe. NASA, ISRO, ESA and...Read More »

What contributes to thicker grease films ?

A rolling bearing preferably runs under EHL conditions. The film thickness between the rolling elements and the rings is determined by the lubricant properties, operating conditions and bearing design. During the initial phase of operation, macroscopic flow (churning) of the grease takes place. It is usually during this churning phase...Read More »

Argonne Embraces Concept of "in operando" Formation of Carbon-based Tribofilms

Earlier this month, tribologists and physicists at the U.S. Department of Energy (DOE) Argonne National Laboratory published news of their (self-described) “self-healing diamond-like carbon coating [that] could revolutionize lubrication” in the journal Nature.  The researchers claim...Read More »

Contact Area vs. Load: Simple Scaling Laws

“God made the bulk; surfaces were invented by the devil”, a Nobel prize winning physicist Wolfgang Ernst Pauli said. In tribology, as in many other sciences, surface features (asperities, roughness) play an important role. In many cases, the surface roughness dramatically alters the friction, contact area,...Read More »

Small Particles - Big Problems

Tiny particles are all over around us and sometimes they may create problems. This is especially of concern with metal particles formed due to wear in man-made engineering devices. Particles formed in car disk brakes may harm lung cells, metal particulate limits the service life of artificial hip...Read More »

Determining Fatigue Wear Using Wear Particle Analysis Tools

...Read More »

Nordtrib 2016: conference summary and outlook on the field of tribology 50 years after the Jost report

Nordtrib 2016 came to a close last Friday and I returned home inspired and energized for the next stint in my PhD research. This post is an overview of the conference and summarises the outlook on the field for the years to come based on the round table discussions and...Read More »

Who is The First? Leonardo da Vinci!

Leonardo di ser Piero da Vinci, the famous Italian engineer, architect, painter, musician, mathematician can also be considered as The First Tribologist! Although the term itself was invented approximately 450 years after Leonardo da Vinci (1452-1519), he was the first one to perform the systematic study on friction,...Read More »

Bio-lubricants and Environmentally Acceptable Lubricants (EAL)

The increasing awareness on environmental pollution caused by many chemicals, including lubricants, promotes the use of environmentally friendly products. There is a clear trend towards a more responsible use of lubricants and several legislations already limit the use of certain oils in some applications. Bio-lubricants are present in construction, mining...Read More »

In Situ Nanopolishing (ISN): A New Lubrication Paradigm Aimed at Permanent Surface Perfection

All conventional lubricants borne of classic hydrodynamic theory are designed to provide lubricity. Inherent in the desire to provide lubricity to mechanical systems is the desire to protect the interacting metal surfaces from wear. Much effort in tribology...Read More »

Surface Replication Compounds

The first challenge when measuring a surface topography via optical techniques is getting the sample to the lab. Although optical surface roughness measurement does not damage the component per se (NDT), the fact of fitting it into a microscope generally requires the destruction of the original component. The surface replication...Read More »

Wear in nanoscale: optimum AFM tip roughness

Wear is a gradual removal of the material of the bodies during their interaction. The process appears in many mechanical systems, ranging from large scales, as in wind mills, to nanoscales, as in the AFM tip – substrate contact. The macroscale wear is a relatively well developed field of tribology,...Read More »

"Car 2020" and Tribology Research

Friction has been a challenge for the mankind throughout the whole history since it resists the motion. It resists the transportation of goods. And transportation shares 20% of the global energy consumption and approximately 18% of the greenhouse gas emissions. Out of this share, road transportation builds up to 72%...Read More »

Ice Lubrication and the Forbidden City

Forbidden City is a historical symbol of China, located in the center of Beijing and was constructed between 1406 and 1420 . It served as an imperial palace for almost 500 years and consists of 980 buildings on 180 acres area. Large number of massive buildings required mining and transportation...Read More »

So, what is it, superlubricity?

From the first friction quantitative experiments by Leonardo da Vinci (1452-1519) and most notably from our everyday life experience, it is known that there is an inevitable force opposing to the initiation of motion of one body on the surface of another. This force has to be exceeded, in order...Read More »

Modeling rough adhesive surfaces

Imagine a new type of tyres whose structure has been designed to have greater adhesion on the road. Quite a timely discussion during the long winter nights. French physicists have now developed a model to study the importance of adhesion in establishing contact between two patterned, yet elastic, surfaces. Nature...Read More »