• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1992 Fiscal Year Final Research Report Summary

Study on Wear of a Ceramics/Metal Composite

Research Project

Project/Area Number 03650121
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 機械要素
Research InstitutionThe University of Tokyo

Principal Investigator

KATO Takahisa  The University of Tokyo, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60152716)

Project Period (FY) 1991 – 1992
KeywordsComposite / Wear / Friction / Frictional Heating / Elastic Deformation
Research Abstract

In order to understand characteristics of friction and wear of composites, a composite slider consisting of ceramics (MnNiO ceramics) and metal (CoNbZr amorphous metal) is tested against a rotating disk made of zirconia. The results show that gross wear rate of composites is governed by the inverse rule to some extent. The inverse rule is useful for material design since it is possible to predict gross wear volume of composites by using the this rule.
On the other hand, when a composite material is worn out, an uneven worn surface with a level difference is generally formed between constituents. It is necessary to clarify the mechanism of formation of the uneven surface in order to understand the mechanism of wear of composites. We carry out wear tests of composites with respect to the uneven surface, and then take applied load and sliding velocity as parameters of test conditions. It is observed that the shape and the level difference between ceramics surface and metal surface strongly depend on the sliding conditions. The notable features are as follows: (1) With the increase of pressure, the level difference between constituents becomes large. (2) In case of large pressure and high sliding velocity, a shape like a hawk nose appears at the leading edge of ceramics surface and a relatively deep groove at the leading edge of metal surface. In this study, the mechanism of formation of the uneven surfaces is also investigated theoretically by using the theories of elastisity and heat conduction. It is obtained from the numerical analysis that elastic deformation of constituents and local reduction in strength due to frictional heating play important roles in forming uneven worn surfaces of composites.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 小原 新吾: "セラミックス・金属複合体の摩耗" 日本潤滑学会トライボロジー会議予稿集(東京). 111-114 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小原 新吾: "セラミックス・金属複合体の摩耗-摩耗面の弾性変形を仮定した理論的検討-" 日本トライボロジー学会トライボロジー会議予稿集(盛岡). 523-526 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] OBARA,S.,: "Wear of a Ceramics/Metal Composite" Proc. of JAST Trib. Conf. Tokyo. 111-114 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] OBARA,S.,: "Wear of a Ceramics/Metal Composite --- Analytical Study based on Assumption of Elastic Deformation of Frictional Surfaces ---" Proc. of JAST Trib. Conf. Morioka. 523-526 (1992)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1994-03-24  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi