Breviary Technical Ceramics






5.7.3 Abrasion Mechanisms

Abrasion Mechanisms can be divided according to the fundamental processes that result from the action of the stress complex on the elements of the tribological system. According to our present understanding, four different principal abrasion Mechanisms must be distinguished:

Figure 95:
Boundary layers form and are separated (e.g. cold welding)

Figure 96:

Material is removed as a result of scratching stress (microchips)

Figure 97:
Tribo-chemical reaction:

The formation of reaction products through tribological stress in chemical reactions (e.g. hot spots)

Figure 98:
Surface spalling:

Fatigue and crack growth in the surface region as result of cyclical tribological stress causing material to separate.




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