Accession Number : AD0870978

Title :   The Effect of Oxygen Partial Pressure on the Friction and Wear of Nickel on Copper.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Petersdorf, Paul K.

Report Date : JUN 1970

Pagination or Media Count : 92

Abstract : An experimental study was made to determine the effect that varying the oxygen partial pressure in an oxygen-argon gas mixture had on the friction and wear of copper-nickel friction couples. Tests were conducted using a pin on disk apparatus for oxygen partial pressures from 10 to the minus 10th power atm to 1 atm and for a hydrogen reducing atmosphere. The friction coefficient was found to be dependent upon the oxygen pressure above 10 to the minus 10th power atm, increasing from a low value of 1.1 for 1 atm of oxygen to approximately 1.7 for oxygen partial pressures below 0.0001 atm and for the reducing atmosphere. Qualitative examination of the wear produced during the friction experiments indicated that it was characterized by the transfer of copper from the flat specimens to the nickel rider. The amount of metal transfer was dependent upon the oxygen partial pressure of the gas atmosphere in which the testing was conducted and varied in the same manner as was noted for the friction coefficient. (Author)

Descriptors :   (*NICKEL, FRICTION), (*COPPER, FRICTION), WEAR RESISTANCE, CONTROLLED ATMOSPHERES, OXYGEN, ARGON, THESES.

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE