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Evaluation of Adhesion Strength in a Ti/Al2O3 Composite

Published online by Cambridge University Press:  15 February 2011

Hsin-Fu Wang ,
John C. Nelson ,
Chien-Li Lin ,
William W. Gerberich ,
Charles J. Skowronek  and
Herve E. Deve
Hsin-Fu Wang
Affiliation:
University of Minnesota, Minneapolis, MN 55455.
John C. Nelson
Affiliation:
University of Minnesota, Minneapolis, MN 55455.
Chien-Li Lin
Affiliation:
University of Minnesota, Minneapolis, MN 55455.
William W. Gerberich
Affiliation:
University of Minnesota, Minneapolis, MN 55455.
Charles J. Skowronek
Affiliation:
Metal Matrix Composites Program, 3M Company, MN 55144.
Herve E. Deve
Affiliation:
Metal Matrix Composites Program, 3M Company, MN 55144.
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Abstract

The mechanical properties of interfaces in Ti/Al2O3 composites were characterized by four point bending and fiber pushout tests. To determine the bi-material fracture toughness with four point bending tests, planar interfaces were evaluated as sandwich composites. By changing the processing temperature from 700°C to 1000°C, the interfacial fracture energy was found to increase ug to 950°C. It then decreases when the processing temperature is further increased to 1000°C. This is because of the formation of the intermetallic compound (Ti3Al). Interfacial shear strength and interfacial frictional stress of 323MPa and 312 MPa were obtained, respectively, by performing pushout tests of the Al2O3 fiber reinforced Ti matrix composites. These values are smaller than the shear yielding strength of the Ti matrix which is 525 MPa.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 314: Symposium R – Joining and Adhesion of Advanced Inorganic Materials , 1993 , 103
Copyright
Copyright © Materials Research Society 1993

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