Proceedings of submicron multiphase materials
This book contains the papers presented at Symposium R of the spring 1992 Materials Research Society meeting held in San Francisco, California. The title of the symposium, Submicron Multiphase Materials, was selected by the organizers to encompass the realm of composite materials from those smaller than conventional fiber matrix composites to those with phase separation dimensions approaching molecular dimensions. The development of composite materials is as old as the development of materials. Humans quickly learned that, by combining materials, the best properties of each can be realized and that, in fact, synergistic effects often arise. For example, chopped straw was used by the Israelites to limit cracking in bricks. The famed Japanese samurai swords were multilayers of hard oxide and tough ductile materials. One also finds in nature examples of composite materials. These range form bone to wood, consisting of a hard phase which provides strength and stiffness and a softer phase for toughness. Advanced composites are generally thought of as those which are based on a high modulus, discontinuous, chopped or woven fiber phase and a continuous polymer phase. In multiphase composites, dimensions can range from meters in materials such as steel rod-reinforced concrete structures to angstroms. In macrophase separated composite materials, properties frequently follow the rule of mixtures with the properties approximating the arithmetic mean of the properties of each individual phase, if there is good coupling between the phases. As the phases become smaller, the surface to volume ratio grows in importance with respect to properties. Interfacial and interphase phenomena being to dominate. Surface free energies play an ever increasing role in controlling properties. In recent years, much research in materials science has been directed at multiphase systems where phase separations are submicron in at least some dimension.
- OSTI ID:
- 7181886
- Report Number(s):
- CONF-920402-; ISBN: 1-55899-169-7; TRN: 92-038786
- Resource Relation:
- Conference: 1992 Material Research Society (MRS) spring meeting, San Francisco, CA (United States), 27 Apr - 2 May 1992
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COMPOSITE MATERIALS
DUCTILITY
MEETINGS
PHASE DIAGRAMS
SMALL ANGLE SCATTERING
SOL-GEL PROCESS
SILICIC ACID
ESTERS
ALKOXIDES
CHEMICAL REACTION KINETICS
INORGANIC POLYMERS
LEADING ABSTRACT
MOLECULAR WEIGHT
NEUTRON BEAMS
ORGANIC POLYMERS
POLYMERIZATION
REINFORCED MATERIALS
SILANES
SILOXANES
ABSTRACTS
BEAMS
CHEMICAL REACTIONS
DIAGRAMS
DOCUMENT TYPES
HYDRIDES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MATERIALS
MECHANICAL PROPERTIES
NUCLEON BEAMS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PARTICLE BEAMS
POLYMERS
REACTION KINETICS
SCATTERING
SILICON COMPOUNDS
TENSILE PROPERTIES
360602* - Other Materials- Structure & Phase Studies
360601 - Other Materials- Preparation & Manufacture
360603 - Materials- Properties
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures