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Designing Interfaces

Published online by Cambridge University Press:  29 November 2013

James A. Cornie
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Extract

During the 20 years I have been working in the field of metal matrix composites, I have always been drawn to the study of interfaces. Any problems the materials researcher or developer encounters will eventually be tied to some issue involving the interface. The interface controls the in-situ fiber strength and hence the axial strength of the composite. The transverse strength of composites is also controlled directly by the strength of the interface. It follows that in order to optimize a fiber/matrix reinforcement system, one must also optimize the interface. It is no accident, then, that so soon after the two excellent issues on interfaces edited by D. Wolf and S. Yip (MRS Bulletin, September and October 1990), we launch into the subject again. This time, we approach the interface from the point of view of integrating the fields of materials science and engineering, i.e., integrating the structure-processing-properties-materialssynthesis relationships.

The concept of interface design is relatively new. Until recently, we simply controlled damage and limited fiber degradation by controlling processing variables, and contented ourselves with what nature allowed. For the most demanding applications, nature was not permitting reliable structures.

Our emphasis in this issue of the MRS Bulletin is the development of the skills and strategies to design interfaces to a specifie application. In the future, we will be asking materials to perform structurally at temperatures approaching 3000°C in some propulsion applications. The success of such applications will depend on how well we design the interfaces.

Type
Engineered Interfaces in Composites
Information
MRS Bulletin , Volume 16 , Issue 4 , April 1991 , pp. 27 - 30
Copyright
Copyright © Materials Research Society 1991

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