Development of polycrystalline yttrium aluminum garnet (YAG) fibers. Issue 15 (December 2015)

• Record Type: Journal Article
• Authors: Kim, Hyun Jun; Fair, Geoff E.; Hart, Allison M.; Potticary, Santeri A.; Usechak, Nicholas G.; Corns, Randall G.; Hay, Randall S.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 15(2015:Dec.)
• Page Start: 4251
• Page End: 4258
• Publication Date: 2015-12
• Subjects: Polycrystalline -- YAG -- Extrusion -- Mechanical strength -- Transparency; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.07.011
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Polycrystalline yttrium–aluminum garnet (YAG) fibers are attractive for high-power lasers and for high-temperature structural materials. Processing methods for <30 μm diameter polycrystalline YAG fibers suitable for single-mode laser operation are presented. The methods use extrusion of classified YAG powders with binders. Extrusion rheologies and rates, and heat-treatment temperatures, times, and environments that yield the most dense, defect-free fibers were explored. Fiber tensile testing, followed by fractography, was used to identify defects and to guide determination of optimal processing conditions. The effects of processing variables on fiber microstructures and properties are discussed. Advantages and disadvantages of processing methods are compared.