This memorandum summarizes information on refractory materials and composites that was presented at the Thirteenth Meeting of the Refractory Composites Working Group in Seattle, Washington on July 18-20, 1966. The memorandum is based on 34 papers that were presented at the meeting. They are reviewed and discussed briefly within the framework of the following four broad areas: materials technology, process technology, specific hardware applications and tests, and evaluation techniques. Included in the section on materials technology are discussions dealing with bulk refractory materials, coated systems, and fiber-reinforced composites. The section on process technology discusses cladding and general fabrication processes. The specific hardware applications and tests cover rocket-motor components, and cladding of a probe used in the glass industry. The section on evaluation techniques covers thermal testing, and non-destructive testing. (Author).

This memorandum summarizes information on refractory materials and composites that was presented at the Twelfth Meeting of the Refractory Composites Working Group in Denver, Colorado, on October 17-19, 1966. The memorandum is based on 38 papers that were presented at the meeting. They are reviewed and discussed briefly within the framework of the following four broad areas: materials technology, process technology, specific hardware applications and tests, and evaluation techniques. Included in the section on materials technology are discussions dealing with bulk refractory materials, coated systems, and fiber-reinforced composites. The section on process technology discusses cladding and general fabrication processes. The specific hardware applications and tests cover rocket-motor components, and jet-engine components. The section on evaluation techniques cover thermal, rain erosion, and wear testing. (Author).

The report is a compilation of 36 papers describing the information discussed at the Thirteenth Refractory Composites Working Group Meeting held at The Olympic Hotel, Seattle, Washington on 18, 19, and 20 July 1967. Representatives of various organizations presented informal discussions of their current activities in the fields of development, evaluation and application of inorganic refractory composites for use in high temperature environments.