Creep Resistant Oxide Fibers.
Abstract
Yttrium aluminate garnet ("YAG"-Y3Al5O12) fibers were fabricated by two methods: a sol-gel method and a carboxylate precursor method. Both methods yielded fine diameter fibers of dense, phase-pure YAG. Green fibers were continuously spun from the sol-gel system and the carboxylate systems. Sintering was done in a batch mode. The sol-gel fibers were fabricated from commercial oxide colloidal sols, mixed with water-soluble polymers. The sintered YAG fibers had excellent bend stress relaxation (BSR) creep resistance. The BSR creep temperature for the YAG fibers was increased by 220 deg C over DuPont's alumina-based PRD 166 fibers and 275 deg C over DuPont's Fiber FP alumina fibers. The room temperature strength of the sol-gel YAG fibers was 500-700 MPa, limited by processing defects. The fabrication, spinning, sintering, and YAG phase development are reported in detail. jg p10
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1994
- Accession Number
- ADA305170
Entities
People
- Bruce H. King
- John W. Halloran
- Richard M Laine
- Yin Liu
Organizations
- University of Michigan