Lubricating Effect of Tungstates on Sliding Friction of Metals at High Temperature

摘要

For survey of new solid lubricants which are effective in high temperature, 18 oxides were examined on stainless steel in high temperature up to 1 000℃. Test equipment used was a ring/disk type friction tester, and test condition uiere 10 mm/s in speed and 1 MPa in contact pressure. The results showed that potassium tungstate allowed smooth sliding up to 1 000℃ without seizure. The combination of acid oxide and basic one causes low friction, and coefficient of friction shows relation to the difference of Ionic Field Strength.