Fe계 벌크 비정질 합금의 미끄럼 마찰마모 특성에 미치는 Mo, Cr 첨가 원소의 영향

• Published in: 대한금속·재료학회지, 53(7) Vol. 53; no. 7; pp. 519 - 528
• Main Authors: 장범택, Beom Taek Jang, 김영인, Young In Kim, 이승훈, Seong Hoon Yi
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 31.07.2015; 대한금속·재료학회
• Subjects: amorphous materials; casting; micro structure; wear; X ray photoelectron spectroscopy analysis; 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2015.53.7.519

Effects of Mo (1~7%) or Cr (2.3~8.3%) content on the friction and wear characteristics of Fe-based bulk metallic glasses (BMGs) were investigated using a pin-on-disc-type tribo-tester, micro-hardness tester, optical microscope (OM) and scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS). Tribo-oxidational behavior of a worn surface was also analyzed by X-ray photoelectron spectroscopy (XPS). The friction coefficient was found to be less than 0.4 for Cr-containing BMG, which is lower than that of Mo-containing BMG. As Mo content increased, the mass loss of BMG decreased gradually. In the case of Cr content, the friction coefficient showed minimal change up to 6.3% composition, but significant reduction at 8.3%. EDS and XPS results indicate the formation of an oxide film on the worn surface. This film was identified as various iron oxides in all compositions, but as molybdenum at high composition and chromium oxides at 2.3% and 8.3% compositions.