Search for dissertations about: "tribochemistry"

Found 3 swedish dissertations containing the word tribochemistry.

  2. 1. Formation and Function of Low-Friction Tribofilms

    Author : Harald Skiöld Nyberg; Staffan Jacobson; Allan Matthews; Uppsala universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 2. On the Formation of Low-Friction Tribofilms in Me-DLC – Steel Sliding Contacts

    Author : Nils Stavlid; Urban Wiklund; Sture Hogmark; Erik Johansson; Uppsala universitet; []
    Keywords : Materials science; tribofilms; tribochemistry; boundary-lubrication; ESCA; Materialvetenskap;

    Abstract : The present thesis thoroughly treats a special friction reduction phenomenon that may appear in boundary lubricated tribological contacts, of the type encountered in numerous mechanical components made of steel. The phenomenon involves the formation of a special type of tribofilm that offers very low coefficients of friction. READ MORE

  5. 3. Semi-deterministic numerical simulations of wear on various scales : From chemo-mechanical effects to the wear of components in orbital type hydraulic motors

    Author : Joel Furustig; Staffan Björklund; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : A costly effect, caused by the relative motion of machine components in contact, is wear. Solid surfaces come into contact when the lubricant film thickness is thin, resulting in locally high pressures and high wear rates. Components and machines will, due to this wear, eventually lose their functionality. READ MORE