Seock sam Kim, Kohji Kato, Kazuo Hokkirigawa

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4 Citations (Scopus)


Alumina ceramics and steel for ball bearing were tested in a four-ball tester to investigate their properties in seizure and wear. A load range per unit ball of 66 N to 871 N and a sliding velocity range of 0. 095 m/s to 0. 630 m/s were selected. Turbine oil was used as a lubricant in this test. Coefficient of friction of alumina ceramics in seizure increase gradually to 0. 4 with the load, but that of steel increased abruptly to 0. 4 regardless of load. After seizure coefficient of friction of alumina ceramics increased from 0. 1 to 0. 15 with the load, but that of steel remained at 0. 1 independently of the load. Scanning electron microscope observations revealed that the wear mechanism in alumina ceramics was brittle fracture and plastic deformation, but brittle fracture predominated when seizure occurred.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalJournal of Japan Society of Lubrication Engineers
Issue number5
Publication statusPublished - 1986 Jan 1

ASJC Scopus subject areas

  • Engineering(all)


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