Sliding-Block Friction Apparatus

Figure 24. Sliding-block friction apparatus (top) and block assembly and striker (bottom) [12].

Fig 1 Sliding-block Friction Apparatus (top) and Block Assembly and Striker (bottom)... 

A sliding-block friction test apparatus is located at Picatinny Arsenal. 

With the Julius Peters apparatus lead azide and mercury fulminate ranked in the same order (Table XV) as those obtained with grit or the sliding-block friction test. 

Figure 25. Representation of the emery-paper friction apparatus [12] (a) sliding block (b) fixed block.

Figure 7-12. Dead-weight tractive force method for measurement of friction. (a) Schematic diagram of apparatus. A Plate. B Block. D Displacement transducer. W Loading weight. X, Y Leads to X-Y recorder, (b) Tractive force vs. displacement. 1 Elastic portions of the displacements 2 microslips 3 sliding. After T. E. Simkins [11].

The friction coefficient and the specific wear rate of the nanocomposites were determined by sliding wear tests on a block-on-ring apparatus against a 100 Cr 6 (German standard) steel ring as the counterpart. A pressure of 1 MPa and a velocity of 1 m/s were used over a duration of 20 h for each sample. Additional wear tests of the composite systems were carried out under fretting test conditions against a ceramic ball as the counterpart. 

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