Friction treatment

NANOCRYSTALLIZATION IN IRON ALLOYS INDUCED BY FRICTION TREATMENT AND NITROGEN DIFFUSION... [Pg.113]

Abstract It was found that both surface friction treatment in inert gas (FT) and friction... [Pg.113]

Key words nanostructured materials, iron-alloys, friction treatment, nitriding... [Pg.113]

The use of severe high rate friction treatment can give grain structure of different scale, i.e. nano-, submicro-, and micro-sized grain structures. These structures of different grain scale take place one after another in the direction to center of sample when deformed surface layer has been formed. [Pg.113]

Objective of this work is to investigate the specific features of modified layer structure formed on the surface of Fe alloys by friction treatment being occurred in nitrogen medium. [Pg.114]

According to procedure published previously the cylindrical samples were heated by friction during sample rotation [1], Hard alloy blocks being pressed to sample surface were used for friction process. Friction treatment was held either in Ar-gas (FT) or in ammonia medium (FN). The temperature of sample ranged from 773 to 853K was controlled by chromel-alumel thermocouple. Duration of treatment was about to 60 min. After FT and FN processes the sample surface was smooth similar to that of original polished one. [Pg.114]

The structure of modified surface layer was investigated using powerful optical microscope Neophot-21 (resolution up to 0.4 pm). Furthermore, TEM images and selected area electron diffraction (SAED) patterns were obtained to study structural evolution caused by simultaneous friction treatment and nitriding. [Pg.114]

Table 1 shows structural parameters and Vickers hardness of modified layers formed by simultaneous friction treatment and nitriding. [Pg.114]

Table 1. Surface layers parameters after friction treatment.

Irrespective of these models for ion binding, the two-state approach is inherent in the dynamic frictional treatment of conductivity in polyelectrolyte solutions, since strongly interacting counterions have to be classified as... [Pg.217]

Ayres S Jnr, Mihan R (i979) Facial dermatitis following friction treatment of acne. Cutis 24 610-611... [Pg.114]

The surface of PTFE articles is sHppery and smooth. Liquids with surface tensions below 18 mN/m(=dyn/cm) are spread completely on the PTFE surface hence, solutions of various perfluorocarbon acids in water wet the polymer (78). Treatment with alkafl metals promotes the adhesion between PTFE and other substances (79) but increases the coefficient of friction (80). [Pg.351]

B. Bhushan and B. K. Gupta, Handbook of Tribology Materials, Coatings, and Surface Treatments, McGraw-HiU Book Co. Inc., New York, 1991 P. J. Blau, Friction, Eubrication, and Wear Technology, Vol. 18 Mmerican Society of Metals (A.SM) Handbook Series, ASM International, Metals Park, Ohio, 1992. [Pg.402]

The fabric may also be given one or more of a number of other finishing treatments, either ia tandem with web formation and bonding or off-line as a separate operation, as a means of enhancing fabric performance or aesthetic properties. Performance properties iaclude functional characteristics such as moisture transport, absorbency, or repeUency flame retardancy electrical conductivity or static propensity abrasion resistance and frictional behavior. Aesthetic properties iaclude appearance, surface texture, and smell. [Pg.155]

The treatment of vent flow calculations in most typical relief wstem configurations involves two classes of computation models flow in low-fric tion geometries such as nozzles and frictional flow in pipes and fittings. [Pg.2292]

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