Question

Which material minimizes wear rate and hardness? (3 pts) 104 103 Dimensionless wear contant K = KM 10-5 Wear rate - Hardness Cu alloys 104 Al alloys Low carbon Metals steels 106 10-5 PTFE Medium carbon steels Stainless steels High carbon steels Low alloy steels 107 10-6 Wear-rate constant, ka (1/(MPa)) Tool steels WC 10% 107 10- PA Com Unfilled thermoplastics PE PP PMMA Polymers and elastomers Cast PC won Bronze Silica glass 10-10 SIC Al Oy Technical ceramics Filled thermoplastics MFA 04 10-11 10 100 10,000 100,000 1000 Hardness, H (MPa)

Answer 1

Out of the given material, PC has minimum wear rate as well as Hardness. Other materials have lowest wear rate but have high Hardness like Bronze and Cast Iron.

Other which have low Hardness buy have High wear rate like, Unfilled Thermoplastic, PP, PE etc. But PC have minimum Hardness with lower wear rate.