금속계와 유기계 마찰재의 분포에 따른 하이브리드 마찰재의 마찰 특성

Abstract

Tribological properties of hybrid type friction materials were studied. Hybrid friction materials were produced by combining non-steel(NS) and low-steel(LS) type friction materials. The emphasis of the inves- tigation was given to possible synergistic effects from the two different friction materials, in terms of friction sta- bility at high temperatures and the amplitude of friction oscillation, also known as stick-slip at low sliding speeds. The high temperature friction test results showed that the friction effectiveness of the hybrid friction material was well sustained compared to LS and NS friction materials. Wear resistance of the hybrid type was similar to LS friction materials. Examination of the rubbing surfaces after tests revealed that the friction characteristics of the hybrid friction material were attributed to the wear debris produced from low-steel friction materials, which were migrated to the surface of the non-steel friction material, forming new contact plateaus. The stick-slip amplitude and its frequency were pronounced when non-steel friction material was tested, while hybrid and low-steel types showed relatively small stick-slip amplitudes. These results suggest possible improvement of tribological prop- erties by designing a hybrid composite of low-steel and non-steel friction materials. Keywordsstick-slip(스틱-슬립), friction( 마찰), wear( 마모), temperature( 온도), low-steel( 금속성 마찰재), hybrid(하이브리드), non-steel(유기계 마찰재)