The Thermal and Electrical Conductivity of Metal-Powder/Resin Composites.
Abstract
The results of provisional measurements are given on the thermal and electrical properties in the temperature range from room temperature down to 2 K of the following composite materials: HERA-type polymer-moulded samarium-cobalt magnets and two kinds of carbon fibre reinforced plastic - the high tensile and the high strength types. The HERA material has a thermal conductivity typical of a heavily-loaded composite and an electrical conductivity which is typical of a metallic alloy. The carbon fibre thermal conductivity both perpendicular and parallel to the fibres is exceedingly low at helium temperatures but it increases rapidly as room temperature is approached. Its electrical resistance increases slightly down to 20 K but it decreases as the temperature is further reduced. The thermal expansion of carbon fibre composite has been measured down to 20 K. On cooling it expands in the direction of the fibre axis but it contracts perpendicular to the axis and this suggests a method of making a material of high dimensional stability. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADA040950
Entities
People
- F. F. T. De Araujo
- H. M. Rosenberg
Organizations
- University of Oxford