Composite Materials Comprising Two Jonal Functions And Methods For Making The Same

Official Gazette of the United States Patent and Trademark Office

Composite Materials Comprising Two Jonal Functions and Methods for Making the Same

The present invention generally relates to mechanisms for preventing undesirable oxidation (i.e., oxidation protection mechanisms) in composite bodies. The oxidation protection mechanisms include getterer materials which are added to the composite body which gather or scavenge undesirable oxidants which may enter the composite body. The getterer materials may be placed into at least a portion of the composite body such that any undesirable oxidant approaching, for example, a fiber reinforcement, would be scavenged by (e.g., reacted with) the getterer. The getterer materials) may form at least one compound which acts as a passivation layer, and/or is able to move by bulk transport (e.g., by viscous flow as a glassy material) to a crack, and sealing the crack, thereby further enhancing the oxidation protection of the composite body. One or more ceramic filler materials which serve as reinforcements may have a plurality of super-imposed coatings thereon, at least one of which coatings may function as or contain an oxidation protection mechanism. Specifically, a coating comprising boron nitride which has been engineered or modified to contain some silicon exhibits improved corrosion resistance, specifically to oxygen and moisture. The coated materials may be useful as reinforcing materials in high performance composites to provide improved mechanical properties such as fracture toughness. The present invention also relates to improved composites which incorporate these materials, and to their methods of manufacture.

Advanced Weaving Technology

This book sets the fundamentals of modern weaving at a new level. It contains information for the design of woven structures with complex cross section and multiple layers for modern applications, in the way that leading product developers, professors and researchers are using them now. It starts with the classical weaving principles and patterning and extends these quickly to multilayer structures, produced with single and multiple weft insertion devices, woven structures with complex cross section or direct 3D shape. The engineering methods for design of the structures using modern software and modern algorithms are also explained. Finally, an overview of different application areas is given. The book is written by the world leading experts in their fields and is prepared as learning tool for people interested in modern weaving. Exercises and end-of-chapter summaries will help the reader to check his own knowledge.