Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1503551 | Scripta Materialia | 2006 | 4 Pages |
Abstract
The tensile strength of sapphire fibers coated with NiAl and BN before and after annealing was evaluated. Fibers without BN interlayer cracked during annealing. This may be due to thermal stress induced fiber fracture during cooling. Fibers coated with BN interlayer retained approximately 60% of their strength after annealing. Fiber surface diffusion and surface reactions with impurities may, in combination with thermal stress, be responsible for the strength degradation.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
David E. Hajas, Stepan Kyrsta, Jochen M. Schneider,