Insulation

Figure 3. Schematic Diagram of the Four-Ball

Wear Tester in the Vapor Lubrication Mode

Figure 3. Schematic Diagram of the Four-Ball

Wear Tester in the Vapor Lubrication Mode electrobalance. As shown in Figure 3, the TCP vapor in a nitrogen carrier gas can be fed into. a four-ball wear tester. The four-ball wear tester, using M50 tool steel balls is run at 600 rpm and the desired load. The ball wear scars are measured in standard fashion.

RESULTS AND DISCUSSION - The deposition on quarts wires with 1.55 percent TCP in a nitrogen stream at elevated temperatures is shown in Figure 4. At 500°C, the deposit fo£ 30-minute exposure was less than five g/cm which is within the limit of error of this measurement.

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