Microscopic observations of sliding wear surface of alumina by TEM

Yoh Ichi Kawagoe, Tetsuya Senda, Kenji Murakami, Chiori Takahash, Koshi Adachi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In a sliding contact between alumina ceramics in atmospheric environment without lubrication, the specific wear rate is significantly low at room temperature. To explore the mechanism of this mild wear of alumina, a series of ball-on-disk sliding wear tests were carried out at various temperatures. TEM observations of the wear surfaces show that a layer of very fine particles (10nm or less) is formed on the top surface in the mild wear regime, which is identified as a meta-stable phase γ-alumina. The layer appears to act as a lubrication film at the contact surface to reduce the wear loss. In a severe wear regime above 300°C, where the wear rate is relatively high, a surface structure consisting of a fine-particle layer and a deformed thin region beneath the layer is observed. Many microcracks exist in the surface structure, which may cause further material removal during a wear test, resulting in a high wear rate.

Original languageEnglish
Title of host publicationMechanical Properties and Performance of Engineering Ceramics and Composites II - A Collection of Papers Presented at the 30th International Conference on Advanced Ceramics and Composites
Pages761-766
Number of pages6
Edition2
Publication statusPublished - 2006
EventMechanical Properties and Performance of Engineering Ceramics and Composites Symposium - 30th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
Duration: 2006 Jan 222006 Jan 27

Publication series

NameCeramic Engineering and Science Proceedings
Number2
Volume27
ISSN (Print)0196-6219

Other

OtherMechanical Properties and Performance of Engineering Ceramics and Composites Symposium - 30th International Conference on Advanced Ceramics and Composites
Country/TerritoryUnited States
CityCocoa Beach, FL
Period06/1/2206/1/27

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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