Articles
  • High-temperature Sliding Wear Properties of GraphiteFe3Al Composites
  • Yong-In Kima, Gye Seok Ana,c, Jin Man Janb, WonSik Leeb, Bong-Geun Parka, Hyung-Bin Parka, YooJin Kimc, Jung-Ju Leed, Se-Hyun Kob,* and Sung-Churl Choia,*
  • a Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea b Advanced Process and Materials Group, Korea Institute of Industrial Technology(KITECH) 156 Gaetbeol-ro, Yeonsu-gu, Incheon 21999 Korea c Engineering Ceramic Center, Korea Institute of Ceramic Engineering & Technology, 3321 Gyeongchung-daero, Sindunmyeon, Icheon 17303, Korea d School of Materials Science and Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41533, Korea
Abstract
Sliding wear properties of graphite-Fe3Al composites were investigated for their applications in the manufacture of sintered bearings capable of withstanding high temperatures and loads. The sliding wear properties of the composites were measured at a high temperature according to the change of graphite content, which added as a solid lubricant. With increase in the graphite content, the sliding wear properties improved; however, when the graphite content exceeded 12 wt%, the sliding wear properties were deteriorated. Analysis by scanning electron microscopy and X-ray diffraction confirmed that graphite and Fe3Al formed a Fe3AlC0.5 phase by partial reaction with the matrix. The reaction dominated with increase of the graphite content. In addition, the Fe3AlC0.5 phase was also formed during wear test and was act as debris, causing deterioration of the sliding wear properties

Keywords: Graphite, Wear, Fe3AlC0.5, High temperature, Sintered bearing.

This Article

  • 2017; 18(8): 599-603

    Published on Aug 31, 2017