Sökning: "sliding friction"

Visar resultat 21 - 25 av 150 avhandlingar innehållade orden sliding friction.

1. 21. Metal release from stainless steel and CoCrMo alloys in protein-rich environments – effects of protein aggregation, friction, and irradiation

   Författare :Zheng Wei; Yolanda Hedberg; Inger Odnevall Wallinder; Daniel Klint; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metal release; stainless steel; CoCrMo; protein aggregation; friction; irradiation; Vroman effect; Kemi; Chemistry;

   Sammanfattning : Highly corrosion-resistant alloys are used in sensitive environments such as the human body and food environments. However, even tiny amounts of released metals from these surfaces could potentially cause adverse effects. It is hence important to study the biointerface between corrosion-resistant alloys and protein-rich environments. LÄS MER

3. 22. Wet clutch friction reliability : influence of water contamination and system design

   Författare :Nowshir Fatima; Donald McCarthy; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Sammanfattning : Wet clutches are machine components using friction to transfer torque and providing interruptible connection between rotating shafts in different automobile applications including automatic transmissions. Like any friction generating machine components, wet clutches are susceptible to continuous wear and degradation during sliding. LÄS MER

4. 23. Formation and Function of Low-Friction Tribofilms

   Författare :Harald Skiöld Nyberg; Staffan Jacobson; Allan Matthews; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tribology; tribofilm; PVD; coating; low-friction; tungsten disulphide; transition metal dichalcogenide; tribochemistry; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

   Sammanfattning : The use of low-friction coatings on machine elements is steadily increasing, and they are expected to play an important role in the reduction of fuel consumption of future motorized vehicles. Many low-friction coatings function by transformation of the outermost coating layer into tribofilms, which then cover the coating surface and its counter surface. LÄS MER

5. 24. Force measurements using scanning probe microscopy : Applications to advanced powder processing

   Författare :Anders Meurk; KTH; []
   Nyckelord :atomic force microscope; AFM; SPM; van der Waals interaction; DLVO-theory; surface forces; colloidal probe; force curve; friction; adhesion; stick-slip; cantilever; calibration; spring constant; silicon nitride; iron; silica;

   Sammanfattning : The object of this thesis is to apply scanning probemicroscopy (SPM) to the field of advanced powder processing.Measurement of interparticle surface forces at conditionsrelevant to ceramic processing has been performed together withthorough studies of powder friction. LÄS MER

7. 25. Graphene as Solid Lubricant in Polymer Composites : With Application in Hydropower Bearings

   Författare :Julian Somberg; Nazanin Emami; Jan Ukonsaari; Gil Gonçalves; Sergei Glavatskih; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Graphene; Solid Lubricant; Polymer Composite; Friction; Hydropower; Machine Elements; Maskinelement;

   Sammanfattning : With a rising global demand for green energy production, hydropower plays a key role in securing a reliable and sustainable energy supply. Hydropower is the largest and most efficient renewable energy source, with an ever-increasing capacity. LÄS MER