Nonmetallic Materials and Composites at Low Temperatures

This was the third meeting in the series of special topical conferences on Non-Metallic materials at low temperatures. The first meeting was in Munich in 1978, the second in Geneva (1980) and so Heidelberg 1984 seemed an obvious time to review some of the hopes and objectives of the earlier meetings. It is also appropriate to consider the changing needs of the cryogenic community and how best the theory and practice of Non-metallic materials can be applied to suit this dynamic young science. The aims and objectives of the International Cryogenic Materials Board in sponsoring this meeting remain the same. Namely, to provide a forum where practicing Engineers can meet with materials suppliers and researchers in an attempt to ensure that a real understanding exists between the two sides of the Cryogenic Materials Community. In this atmosphere, real problems can be addressed together with full discussions of tried and tested practical solutions. It is in this way that knowledge and confidence may grow hand in hand with the logical growth of the industry.

Contenu

Thermal Expansion of Non-Metals.- The Low Temperature Thermal Conductivity of Rubber.- The Thermal Conductivity of Polymers Below 1K.- Mechanical Properties of Three Candidate Organic Insulator Materials for Fusion Reactors.- A New Way to Calculate the Fracture Toughness of Mouldings on Impact Load in Comparison with Linear Fracture Mechanics.- Craze Formation and Cryogenic Toughness.- A Simple Device for Short Time Cryogenic Tests and its Application in High Velocity Tensile Measurements.- Apparatus Permitting Rapid Consecutive Flexural Testing at 4.2 K.- Radiation Effects on Polybutyleneterephthalate Resins at Low Temperature.- Low Temperature Properties Probed by Selective Laser-Excitation.- Optical Investigation of Pressure-Induced Matrix Changes in Polymers under Low Temeprature Conditions.- Low Frequency Measurements on Polymethylmethacrylate.- Very Low Frequency Loss Measurements in Glasses.- Mechanical and Dielectric Losses of Polymers in the Temperature Range of 5K to 293K.- Mechanical Properties of Unidirectionally Reinforced Materials.- Dynamic Young's Modulus and Internal Friction in Composite Materials.- Low Temperature Ductile Matrices for Advanced Fiber Composites.- Fabrication of Carbon Fibre Reinforced Thermoplastics Polycarbonate and Polysulfone.- Interlaminar Shear Strength of Carbon-Fibre Reinforced Thermoplastics Polycarbonate and Polysulfone.- Acoustic Emission and Interlaminar Shear Strength.- Mechanical Properties of Low Thermal Contraction GFRP.- Adhesive Properties at Low Temperature of Epoxy Resin Pre-Impregnated Tape.- MDF Cements for Low Temperature Applications.- Present and Future Application of Nonmetallic Materials in Cryogenic Technology: Summary of the Panel Discussion.